2001 GMC Yukon "causes engine sputter 40 mph" Questions

...ENGINE POWER AND WONT LET ME DRIVE PAST 35 OR 40 MPH The following is a post from another site. I had the same problem and this worked for me. Hello all, I just wanted to share with everyone with the ...

...engine sputtering above 40 mph causing the check engine light to come on. They found and replaced all the lifters and a tune up and it did not fix the problem. I then returned to the dealership, ...

...40 and 50 mph this may be caused by the engine "coil-packs that send the spark to your plugs" While checking make sure that there is no oil leaking onto them. This seems to be a common problem among ...

...40 mph it runs fine. Anyone have any advice? Air is more dense at lower temperatures so the cylinders fill better and there is some evidence increased humidity also helps engines to run better. ...

engine coolant sensor) is shot.  If so, it will stick on -40 degrees, signalling the ECM to flood it with gas because it thinks it's cold.  This dumps alot of gas into the system causing

engine will sputter and choke out. Any uphill travel and car will lose speed dramatically. Have you checked the air inlet sensor on the air filter. If this fails the engine goes into safety mode which

...40 mph...then it started stalling at stops and lost alot of its power, it wasnt moving as fast as it use to even on flat surfaces. then it would start but as soon as you put some gas it stalled. now ...

...40 mph (didnt want to force it) noise coming from engine..... Would having the ac on for a few cause a problem? I noticed it tried to stall so i turned ac off. It then started this problem after i ...

...40-50 mph. POSSIBLE CAUSE ENGINE SPUTTERING COULD BE CLOGGED FUEL FILTER,DIRTY FUEL INJECTORS.CHECK FUEL PRESSURE COULD BE WEAK FUEL PUMP.CHECK FUEL PRESSURE SHOULD BE.25 -65 PSI OR 30 - 40 PSI. fuel ...

...40 and if I push on gas just slightly it'll do it to but not really over 50 mph just recently it started getting worse now when I put it in drive the idle is choppy and just about stalls I ...