Chevy Truck Bogs Down When Accelerating

Mostly about the accelerator pump, but when I look down the barrel and push the throttle gas squirts out both sides in a steady stream. 1995 Chevy 1500 1/2 Ton Truck (350, 5. Details Chevy Cavalier Car Repair Help. replace if needed. I have a 93 chevy silverado and the other day was idling fine then the truck just died. Currently it will cut in and out and lose power or bog down almost like a misfire but its not a misfire if that makes any sense. You could try disconnecting all the sensors except the TPS , O2 and MAF/MAP and see how it runs. On a TBI motor with Electronic Spark Timing, you unplug the Tan/black stripe wire next to the brake booster to disable the EST and time the motor to 0. 1988 chevy silverado bogging down when accelerated, idles fine with MAP sensor unhooked, With MAP hooked up, idle is erratic, and bogs out when accelerating, occasional backfire through carb. as for fuel injection u might want to have the throttle position sensor tested. My car has an automatic transmission. I replaced the temperature sensor and IAC and still have the same problem. If you want to submit your truck, make sure it meets the criteria. The truck runs fine while. I highly doubt that my cat is plugged because I can rev up the engine to 6500 rpms no problem. I accelerate more to a higher speed to get past this but still sputters and pops. the sound it makes is like its bogging down when im trying to speed up. New to the site. ---Summary: New Fuel pressure regulator EGR valve plugs and wires Runs very sluggish. Every body seam every interior fit is perfect. You probably have a 3. I noticed it the other day when I was hauling a small trailer. In that graph you aren't going to bog you engine at any point because of torque. I can drive it around the neighborhood and even get on the freeway but if I try to accelerate at all the motor just goes slower and slower the rpms continue to fall untill I let completely off the pedal and lightly press down again. Thought it was lack of fuel getting to the motor. every time this happened to me it was the egr. The service manual calls for a pressure of 58-62 psi - 1992-1999 Chevrolet Tahoe. The truck idles strong, even maybe a 100 rpms or so higher then normal (when in neutral) but the idle settles down as the truck warms up. 67 1 TON- work truck 396 sm 420 4-speed, flat bed 4. 3 Bogging down? Answer. com (Normally a launch shudder or left under hard acceleration). Just within the last month, it has started to hesitate off the line when cold -- then runs ok when it warms and then it st. Then one day it starts bucking and hesitating on take off to the point it wasn't driveable. sensor, tried new computer, at a loss starts right up and idles great, take in down the road and starts surging. Thanks in. I own a '98 Chevy 1500 with the 5. I have a 93 Chevy C1500 4. Bogs down when trying to accelerate (1994 Chevrolet C1500) replaced: fuel filter, dist cap, rotor, plugs & wires, catalytic converter, water pump, timing chain. 7 350 tbi in this truck w/123000 miles engine stumbles when light pressure is applied on go pedal but give it just a little more and she goes just fine runs great other wise no service engine soon light some things i did right before i noticed this problem were put stp fuel system. Poor idling and loud engines usually go hand-in-hand. Finally figured out a bad connection somewhere down the line. 30 if that's available for his truck. I limped it home and parked it. I replaced all the sparkplugs yesterday, replaced my fuel filter, and also checked the air flter. It has 127,00 miles on it. The 6 speed trans gives very smooth acceleration not bogging down at all and I get 33. It does this worse when it is first started, but I kind of expect that. Average repair cost is $3,090 at 62,950 miles. If the lines get clogged, the vehicle can accelerate slowly or hesitate and stall. I just purchased a 82 silverado last night, the engine runs great, starts right up and when I give it gas it revs fine. had to rebuild cosmetics myself truck ran fine until exhaust filter issues, regenerated after fixing radiator support, ran fine until bog down issues, whinning or rubbing sound when tranny switches gears , better in manuel shifting , diesel cummins, sounds like its climbing hill or hauling at 55mph no external damage or computer lites? ?????. Partially plugged catalytic converter changed, TBI pumping fuel, new fuel pump, when you step down hard to accelerate it bogs down and then slowly comes back alive once it reaches a higher rpm. Took the truck down the street and now it has trouble accelerating from a cold start as well. I push on the gas and it starts to take off then it bogs down at about 1k rpm. At idle it has a slight miss, and under load any sort of load or while accelerating through mid range RPMs, it runs like absolute crap and will even feel like a shutter at times. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. I put it on, drove it down the street a couple times and it felt fine so I took it out on the road. It doesn't do that all that often though. truck bogs down when accelerating. The 2001 Chevrolet Impala has 10 problems reported for hesitation when accelerating. When I hit the gas the engines just bogs down, begins to hesitate, and will not accelerate. It doesn't do it at slower speeds like 50-55mph. 88 Chevy Blazer 4X4. But when you accelerate past 1000 RPM the engine "bogs" down and sputters, and sometimes backfires under the hood. Call (765) 347-9443 for more information. 7 vortec engines. Re: 1995 honda civic bogging while accelerating Do you know what trouble code numbers they were? To confirm a restriction in the exhaust system caused from a plugged converter, broken substrate, or collapsed muffler your mechanic can screw a back pressure gauge into the O2 sensor hole and monitor pressure to see if it has become too excessive. (It's about 2 inches long) but this is what was getting clogged up. I have a 1971 f100 myself is a 360 manual 4 speed and that fixed that problem. Acceleration problem-1989 Chevy 350 Results 1 to 6 of 6 Discuss Acceleration problem-1989 Chevy 350 in the alt. I was having issues with it wanting to bog down whenever I gave it gas. It doesn't do this all the time but When I'm going down the road after about 30 minutes of driving my truck will sometimes bog down when I try to push on the gas pedal and it acts like it's going to cut off and the engine misfires. driving down the road it does fine, never sputters or struggles, but once i stop at a light it starts the rough idle. Why does engine rev up and down when I step on brake? My engine isn't missing at idle or acceleration. It starts up fine and then the idle is really weird, the RPM's surge. Deprecated: Function create_function() is deprecated in /www/wwwroot/autobreeding. Hi to all mechanical minded people, My car struggles accelerating up hill, on straight road it accelerates fine. It'll drive ok if I'm light on the pedal; and the engine feels smoother than ever. I am not getting any warnings or codes. mine wouldnt burnout till i got the timing dead on!!!!. Torque is quick as in how quick you can go fast. sensor, tried new computer, at a loss starts right up and idles great, take in down the road and starts surging. I couldnt disagree more. In other words when accelerating normally the engine will randomly bog down as if it's mis-firing. Now when it bogs it just stays that way. My 200 chevy 1500 silverado 4. truck bogs down I havnt driven my truck in a few days,last day I drove it it was -10 below and ran fine. As I approached a hill I stepped on it and slowed down? When I back off of the pedal a bit it felt like the decelleration stopped and maybe even had a little acceleration. (very new to carburators) I seem to have a smooth idle and the truck acccelerates okay if done slowly. But when you accelerate past 1000 RPM the engine "bogs" down and sputters, and sometimes backfires under the hood. - Truck idles great in park and all gears, and otherwise runs totally smooth. For some scan tools enter VIN 10th "L" 3rd "C" 8th "K". The Jeep Liberty was introduced by Chrysler as a sport utility vehicle in 2002. Re: 1995 honda civic bogging while accelerating Do you know what trouble code numbers they were? To confirm a restriction in the exhaust system caused from a plugged converter, broken substrate, or collapsed muffler your mechanic can screw a back pressure gauge into the O2 sensor hole and monitor pressure to see if it has become too excessive. Check to make sure your check engine light is not on, or that it is on with the key on but. Hopefully this article will be useful for you. ago) has 150k on it and it boggs down and sometime shut off when coming to a stop. When first started it runs fine for a few seconds then just dies like. Chevy silverado 5. Also filled tank at 3 different stations, 3 different brands, to rule out bad gas. 9L my problem is when i accelerate it bogs, the more i press down on the gas pedal the more it bogs down. I would go to accelerate while going down the road and it would hesitate and bog down. Ok so, I just bought this car about a month ago and the problem happened the second I pulled into my block which was about 30 minutes away from where I bought it. Carburetor rebuild, throwing parts at, and uncertainty as to this truck being sent to the crusher. ) Ill shift my truck into neutral and rev it to find that at about 2k RPMS my truck bog's itself really bad & very noticeably (for about 2 or 3 (sometimes 4) revs). But yea, 1-2 and 2-3 are generally 'rough' shifts that jerk the car under moderate acceleration. We've recently replaced the exhaust manifold (the old one had a bunch of holes) and the O2 sensor. Truck cold: Running at 47psi. When you look at the timing, the advance is working but it is controlled by the esc. If the switch is defective or out of adjustment your trans won't kick down under load and the truck will bog down. Why does engine rev up and down when I step on brake? My engine isn't missing at idle or acceleration. 7 V8, 4L80E. Partially plugged catalytic converter changed, TBI pumping fuel, new fuel pump, when you step down hard to accelerate it bogs down and then slowly comes back alive once it reaches a higher rpm. I limped it home and parked it. 7 bogs/backfires when I give it gas. After that when I let go of the gas and start to accelerate around 40-60 mph my truck sounds like it starts bogging out. we got the timing all set and it idles nice, and when the rpm are brought up slowly it revs up no problem, but when we hit the throttle the motor bogs down and dies. I will look at both and let you know. Many customers who come to us learn that, despite a previous diagnosis, they don't need a new engine, only certain repairs or adjustments. Edelbrock Sputtering and Bog at WOT Acceleration! Performer 600cfm and my truck started really bogging down when I hit it. Tahoe & Suburban - Engine Bogs Down/Miss/Backfire 1999 5. replace if needed. Any suggestions are appreciated. Changing my exhaust manifold did not help my acceleration issue. The car can be driven gently and will accelerate very slowly at slight throttle. It's 2003 Chevy Trailblazer. As soon as I let off the pedal it smooths out. Car starts on a dime and drives great for about 10 mins just all of a sudden just bogs down and idles really low then finally stalls. While accelerating in boggs down on it's face & i get oil coming out of my PVC Valve. No knowing what engine size or what transmission you got, I would think that it starts with checking your airfilter and air intake. 8 second run to sixty and a 14. Okay so i just bought a 2008 chevy silverado 5. Hesitation on Acceleration DIY Troubleshooting & Fixing the Problem Myself 1985 SBC Chevy Hesitation Bogging Solved - Duration What is the BEST Fuel to Use in Your Car or Truck and WHY. Replaced them and I started to get symptoms like most other S-10's (bogging down, hesitation on initial acceleration, if i put in reverse would even occasionally stall). It might suck on the street, but theres no fair trade off here Could maybe run a 4. 97 chevy blazer 4. The handling is exceptional and very quiet to drive. If I push the pedal down too fast, the engine bogs down. The handling is exceptional and very quiet to drive. The acceleration is cutting out. Also filled tank at 3 different stations, 3 different brands, to rule out bad gas. Below is the text from GM Service manual for 1997 Chevrolet C Pickup 5. You probably have a 3. The issue is the truck starts to vibrated at a speed of 50-55 mph like if you are going thru speed bumps and the noise stops when you go over 60 miles per hour. When you accelerate, weight usually shifts to the rear, which enhances traction. when i put it in park or nuetral it idle up but it still lopes. Thread Off Road Race Shop for Truck and Buggy parts. It seems to have very little power I limped it home at forty but it bogs down whenever you step hard on the gas. I replaced all the sparkplugs yesterday, replaced my fuel filter, and also checked the air flter. Re: Chevy 4. I'll give it some gas and it'll go away. com/q5jhyf/2ho3. There are no diagnostic codes (except 12) from the computer. I push on the gas and it starts to take off then it bogs down at about 1k rpm. Before I put more money into it (besides radiator) I'm thinking of getting it checked out by my mechanic for some tests. you can stop and shut it off start it again and runs fine for a few minutes. At Highway speed towing 12k - at 60mph - when attempting to accelerate, engine would bog and take a couple of seconds to L5P: 2018 GMC Duramax bogs down when accelerating - Diesel Place : Chevrolet and GMC Diesel Truck Forums. It almost feels like the fuel is not coming up to the primary boosters quick enough when the throttle blades pass by the top of the transition slots. I have had the same problem that you are talking about. I saw my grommets on valve covers were damaged from age and heat. Replaced them and I started to get symptoms like most other S-10's (bogging down, hesitation on initial acceleration, if i put in reverse would even occasionally stall). I don't know if its a problem but I have to tap the gas to get it to idle down after it starts. A decrease in fuel economy can also signal a poorly functioning fuel injector. It doesn't do this all the time but When I'm going down the road after about 30 minutes of driving my truck will sometimes bog down when I try to push on the gas pedal and it acts like it's going to cut off and the engine misfires. Temperature only seems to make a slight difference but I do notice some improvement with the Coolant Sensor disconnected. When going up the slightest incline on the highway (overpass, for example) the engine bogs, it loses speed, and it has to kick down to a lower gear. if the pressure drops, its either your fuel pump. I just got done replacing all the steel fuel lines underneath the truck because they rusted out and started leaking, checked for leaks and kinks, none found, but the hesitation is still there. any help would be greatly appreciated. 1990 Chevy Cheyenne 5. My 1986 Silverado C10 with a small block 305 is having a weird misfire issue. Especially when the AC compressor is on. When you give it gas, it sputters and bogs down. 2003 Chevy cavalier bogging on uphill pull. 2 mpg on the road driving the speed limit. 7 350 tbi in this truck w/123000 miles engine stumbles when light pressure is applied on go pedal but give it just a little more and she goes just fine runs great other wise no service engine soon light some things i did right before i noticed this problem were put stp fuel system. 350 bogging down and sputtering 84 k5 with 350 and 650 edelbrock with electric choke, she starts and idles fine the problem happens when i put a heavy load on it say going up a hill or passing someone it feels like she is bogging down and does not want to go anywhere and starts to sputter if i give her more gas. I have a 99 Tahoe Z71 model. Driving it has trouble accelerating at low RPM. Replaced them and I started to get symptoms like most other S-10's (bogging down, hesitation on initial acceleration, if i put in reverse would even occasionally stall). Not much but a noticable amount always. 3 Bogging, Need answers/suggestions i vote the egr valve, pull it and clean it and dry it see if that helps. 3L bogs down/loses power at near full to full throttle. Re: Chevy 4. My Tahoe is having an acceleration issue C/K Car Forums. 2002 s10 zr2 runs rough bogs down when you accelerate. 7 bogs down under very light acceleration and wants to stall when Why does a 1993 Chevy truck Bogs down when you step on the gas if you let off the accelerator a little. he said the solenoid couldnt be 100% ruled out, but theres no code for it and he said remotely it functions properly. Sssigning. It does it for awhile until I accelerate harder then it stops any ideas. During acceleration truck bogs down. The 6 speed trans gives very smooth acceleration not bogging down at all and I get 33. Chevy Truck Bogs Down When Accelerating. I have a 93 chevy silverado and the other day was idling fine then the truck just died. Every body seam every interior fit is perfect. Its not my daily driver butIt could be with no problem. Changing my exhaust manifold did not help my acceleration issue. It will accelerate fine if I apply the pedal like normal such as at a green light. Thanks for both recommendations. Deprecated: Function create_function() is deprecated in /www/wwwroot/autobreeding. It doesn't advance until the engine gets to maybe 1200-1500 rpm. 1972 3/4 Ton Cheyenne Super, 350ci 650 cfm Edelbrock 4bbl Performer AVS, Edelbrock Torquer intake manifold, Headman Longtube Headers to 2 1/2in cutouts to 3 inch flowmaster super 40's true dual. When I first bought it, I didnt notice any hesitation when taking off. I searched this site and got several conflicting ideas. Replaced fuel pump, filter, relay, spark plugs, wires, rotor. you can get a rebuild kit and a book to rebuild it. When I first noticed this it seemed it just needed blowing out. chevy forum at Car Dealer Forums; Symptoms are as follows: When first started it runs fine for a few seconds then. Why does engine rev up and down when I step on brake? My engine isn't missing at idle or acceleration. I accelerate more to a higher speed to get past this but still sputters and pops. When I gun my truck it hesitates then kicks in. I have a 93 Chevy C1500 4. I have a 2000 silverado z71, with 288K, recently replaced fuel pump and filter about 3 weeks ago, was running great, until last week when it started to hesitate bad and back fire under acceleration, it ran good in idle and underload until is warmed up then when you tried to accelerate it would bog down bad and start popping like tiny backfires and the more gas you give it the engine falls flat. I have a 99 Tahoe Z71 model. Hope this helps. It will accelerate fine if I apply the pedal like normal such as at a green light. It seems to have very little power I limped it home at forty but it bogs down whenever you step hard on the gas. I changed the valve cover gaskets put new plugs & wires, but now it is bogging down when I accelertate but it idles just fine. There is often a backfire or two when this happens. But when you accelerate past 1000 RPM the engine "bogs" down and sputters, and sometimes backfires under the hood. 3 idles great but upon acceleration it starts to surge, changed just about everything, fuel pump,cap rotor, wires, plugs distributor injectors, crankshaft, cam, throttle pos. The 4 cylender is only underpowered if youre used to gunning it at the stop lights. 4 base and I have a problem where I accelerate my car sort of hesitates, kinda jerking a bit. After i floor it a few times it stops. 7 V8, 4L80E. 3 Bogging, Need answers/suggestions i vote the egr valve, pull it and clean it and dry it see if that helps. Then it runs better. - Taking my foot off the gas then back on again seems to help a bit. But for the past two months ive been experiencing this hesitation or bogging down. If im easy on it, then smooth as can be. Finally figured out a bad connection somewhere down the line. We tried a known good quadrajet off another car that was running fine and it still did the same. For the past 8 months now it has been running poorly. Thanks for both recommendations. Replaced the throttle position sensor and thought I found the problem but still bogges down. My truck had a rough idle that varied it seemed depending on the weather so I figured I had a gasket leak. Press the pedal from a stop it kinda bogs then off it goes. So I got me a 2004 Chevy Colorado and all is good until I start driving for about 20-30 min. It's 2003 Chevy Trailblazer. Some help diagnosing the hesitation and bogging down problems on the 5. Any help appreciated!. The service manual calls for a pressure of 58-62 psi - 1992-1999 Chevrolet Tahoe. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. If I press on down on the gas it feels like the tranny down shifts and when the RPM's reach about 2000 it stops the hesitation and goes right on down the road. It'll drive ok if I'm light on the pedal; and the engine feels smoother than ever. I have 1992 1500 chevy truck 4x4, Its always been a good running truck, has the 4. I have antigel in fuel and filter has about 700 miles on it. I own a '98 Chevy 1500 with the 5. Currently it will cut in and out and lose power or bog down almost like a misfire but its not a misfire if that makes any sense. have to crawl through any intersection until it picks up a bit of speed from idle. After that it started having a number of other issues, such as power loss, really bad acceleration, stalling, and a really rough idle. I have a 1997 chevy 1500 siverado with a 5. 1989 chevy corvette 5. - Chevrolet 1999 Silverado 1500 question. The car can be driven gently and will accelerate very slowly at slight throttle. I removed the throttle body and thoroughly cleaned it and the IAC. check that cause if. So, when you crack the throttle, it bogs, doesn't advance and then revs and advances. I have a 96 Chevy 1500 5. 2 mpg on the road driving the speed limit. truck passed engine leak down, so im only left w a bad camshaft actuator solenoid, but the chevy guy said he wasnt going to just throw parts at it and hope they get lucky. Normally it idles around 950-1050 RPM, what has been happening is that it would start, idle high, around 1500, then drop to normal, and then start sputtering and RPMs would fluctuate anywhere between 750 on the high side, all the way to 0, stalling the motor. I couldnt disagree more. No warning lights come on but if you leave it off for a couple of hours truck turns on again but turns off when you drive it. Your 1996 Chevy truck continues to bog down after cold starts after complete tune-up. Why does engine rev up and down when I step on brake? My engine isn't missing at idle or acceleration. Replaced them and I started to get symptoms like most other S-10's (bogging down, hesitation on initial acceleration, if i put in reverse would even occasionally stall). By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. I saw my grommets on valve covers were damaged from age and heat. Or a plugged exhaust. I have tried pulling the shifter down into low and sometimes that helps but the bog is still there. he said the solenoid couldnt be 100% ruled out, but theres no code for it and he said remotely it functions properly. Check to make sure your check engine light is not on, or that it is on with the key on but. No warning lights come on but if you leave it off for a couple of hours truck turns on again but turns off when you drive it. On a TBI motor with Electronic Spark Timing, you unplug the Tan/black stripe wire next to the brake booster to disable the EST and time the motor to 0. I have a 2004 Chevy Silverado extended cab, 4. Full tune up cap, rotor, wires twice. Initial timing -- Chevy 327. 8 second run to sixty and a 14. It almost seems like a fuel delivery issue but then as I mentioned no check engine light is on so all parameters are within normal range according to the trucks brain. My 200 chevy 1500 silverado 4. It feels as if 3500-4000 rpm is its redline or something. Checking wiring, the fan clutch is going bonkers, running high and loud. S-10 & Blazer - Bogs down when trying to accelerate - I started having a problem with my S10 (2001 2wd 2. But my truck has been having a few problems. 95 Chevy 350 TBI acceleration problems. Vehicle bogs down at 35 mph and has a muffled sound trying to accelerate. Carburetor rebuild, throwing parts at, and uncertainty as to this truck being sent to the crusher. If I let the pedal come off the floor by about an inch (maybe not quite that much) there is a slight increase in acceleration and power. What could be causing this extra load on the engine? What could it be in the compressor that is so much resistance?. No bogs, flat spots, etc. we got the timing all set and it idles nice, and when the rpm are brought up slowly it revs up no problem, but when we hit the throttle the motor bogs down and dies. 9 mpg mileage. 3L bogs down/loses power at near full to full throttle. There are a couple issues but the main one is that the truck bogs a bit at full throttle, not a miss, jerk, or anything, just a loss of power. After that when I let go of the gas and start to accelerate around 40-60 mph my truck sounds like it starts bogging out. ART arms, 57 chevy side mirrors. Not much but a noticable amount always. The truck idles fine. I have a 2004 Chevy Silverado extended cab, 4. chevy 350 bogging down The 1967 - 1972 Chevrolet & GMC Pickups Message Board chevy 350 bogging down - The 1947 - Present Chevrolet & GMC Truck Message Board Network Register or Log In To remove these advertisements. After messing with the connection, the truck’s power has mostly been restored. List of car and truck transmission problems. Asked in Chevy Corvette Will 82 Chevy truck rally wheels fit on a 75 corvette? no , one is 5on 5 the other 5 on 43/4 Read More. I couldnt disagree more. 3 Replaced everything on the truck and runs beautifully. 7L TBI and 193k miles on her. It gets worse with the RPM of the engine. Fuel pump seems fine along with fuel filter and regulator. The fuel or ignition system are the two places to begin troubleshooting. I have been noticing a problem lately that has me concerned. What could be wrong with. Just depends on the day, also when I'm rolling down my driver window, my seat heater turns on. It has 127,00 miles on it. Bog from a cruise RPM may be caused by a defective advance mechanism, but on 4 barrel carburetors is often caused by the secondary side opening too soon. For some scan tools enter VIN 10th “L” 3rd “C” 8th “K”. Next day drove it to work and on the corner turned off again. chevy forum at Car Dealer Forums; Truck runs great, but recently when the engine comes off the enriching circuit. There could be many different causes for your car to hesitate when accelerating, but sometimes this hesitation is caused by something that we can take care of by our selves - a dirty MAF sensor. 7L bogs down when accelerating. - Taking my foot off the gas then back on again seems to help a bit. The 6 speed trans gives very smooth acceleration not bogging down at all and I get 33. Chevy's Biggest, Baddest Truck The 2007 Chevrolet Kodiak C4500 is a beast of a pickup that weighs more than 10,000 pounds and stickers around $80,000 Thane Peterson. I would appreciate any ideas any of you may. When you give it gas, it sputters and bogs down. I have changed the plugs, distributor cap and rotor. 7 bogs/backfires when I give it gas. he said the solenoid couldnt be 100% ruled out, but theres no code for it and he said remotely it functions properly. The 2016 Chevrolet Colorado has 22 NHTSA complaints for the engine at 15,416 miles average. My 2000 chevy Silverado with 75000 miles transmision would not shift from 2nd gear to 3rd gear. Login with Facebook. But for the past two months ive been experiencing this hesitation or bogging down. I replaced all the sparkplugs yesterday, replaced my fuel filter, and also checked the air flter. My 95 chevy van 5. I couldnt disagree more. Not much but a noticable amount always. it rattles alittle when accelerating, and there is a pop/ping sound occurs on front driver side when turning right. Truck cold: 2000 rpms at 47psi. 7 vortec that has been having a problem for about 6 months now. I am still currently having the issue of the hesitation and lack of power. There are more than 33 items, which if faulty, that can cause engine hesitation and stumble problems. truck bogs down when accelerating. 1966 inline 6 engine bogs down and stalls out when accelerating from a start This topic looks it has been talked about alot, but I just can't fix it. When I start the truck up, I always let it warm up for a minute before driving. It doesn't do it at slower speeds like 50-55mph.