Hesitation Problems
 

99 Cherokee sport 4.0

When engine gets warm it hesitates and i can barley put any pressure on the accelerator some times when it idles every now and then the ttruck will try to stall out

Any ideas?

Hey WhiteLightning, I was and kind of am having these same issues with my 2000 Jeep Cherokee Sport. I took it to my local mechanic who is pretty familiar with my Jeep, as he has done quite a bit of work on it. I remember it was a pretty hot summer day last year and I thought that I was running low on oil or something the way the engine was reacting (especially at idle), but it seems the pressure itself was just dropping, almost to 25 from 40 and then on the highway would raise up to about 55. I was clueless and did a bit of research myself, but no avail. My mechanic said he cleaned the throttle body and made sure there were no leaks he could detect. It still drops a little bit, but it is no where near as bad as it was. Hopefully, during this summer, I don't run into the same problem. I can ask him again and if he comes up with something different, I will let ya know.

hey thanks for the info, i looked into it today somemore and i hooked up a fuel pressure tester for like 2 minutes it stayed around 50 at idle and didnt fluxuate so i hope its ok. other then that idk ill hook it up to a friendds omputer monday but i have no lights on, on my dash so idk if i have a code triggered or not till i hook up the computer

put some seafoam in it today seems like it helped a little bit still have problems tho any ideas???

I know its not the same brand, but on my probe, it was doing similar, turned out the the TB was dirty, a quick spritz with carb cleaner and wiping it off with a soft towel fixed it.