My truck has a stumble

[smoken02]

Every now and then my tuck will stumble when I hit the accelerator at a dead stop. It doesnt do it every time but at least once a day. Nothing else is acting up. No check engine light. I havent checked for any codes. It is a split second thing. Any ideas?

 

[smoken02]

No ideas here anyone?

 

[LAmiller]

sounds fuel pressure related... what psi do you have when the stumble occurs?

Lavon

 

[BLACK OUT]

Yeah I had the same problem and turned out my fuel pump was going out

 

[Ph4tty]

Try unplugging the comp.

 

[smoken02]

fp is 10psi

 

[DMAXcountry]

buddy had a 3rd gen and it was an injector issue.

 

[BLACK OUT]

Was that 10 PSI at WOT?

 

[smoken02]

Was that 10 PSI at WOT?

Yes 10psi at WOT. I have only got it to stumble with the comp on. Hasnt stumbled with it off yet. It will stumble even in park if I smash the throttle.

 

[LAmiller]

possible IAT sensor if its really cold out... mine stumble a little when temps are 20* or lower but when it warms up it runs good.

Just sent my comp in for a new harness and a software update and it made no difference... Edge thought since its only when very cold out it could be caused by the comp lying to the ECM about the air temp.

I also just bought a new MAP and it didn't make a differnce. I have a new IAT on order.

Lavon