1997 Ford F-150 Poor running after warm up

GRASSLANDPOWER

MEMBER
1997 FORD F-150
V8
2WD
AUTOMATIC
97,000 MILES

My F150 Starts like new when cold starting. As it warms up it starts to hesitate and then eventually will not idle and dies out. Basic tune-up has been done. I do not know the history of this Truck, I bought it from a small dealer and he is un-willing to help in any way. Any ideas would be helpful

4 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Is the check engine light on?

Was this

answer

helpful?

Yes

No

Wednesday, June 4th, 2008 AT 1:14 PM

GRASSLANDPOWER

MEMBER
3 POSTS

Not sure on the check engine. Have not been using the Truck. I will get back to you very soon.

Thanks

Jeff

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Wednesday, June 4th, 2008 AT 1:21 PM

GRASSLANDPOWER

MEMBER
3 POSTS

I did check the Truck again. As always, it starts perfect but then will hardly run after warm up. Check Engine Light did NOT come on when running. Did light up when key turned on as expected.

Was this

answer

helpful?

Yes

No

Wednesday, June 4th, 2008 AT 2:30 PM

MERLIN2021

MECHANIC
17,250 POSTS

https://www.2carpros.com/car_repair_video/test_fuel_injection_pressure.htm
Go here and checkout our video.
Once it warms up it goes into closed loop and all sensors are added into the mix...Map or MAF, even the ECT which acts like the choke could be a bit out of range. Check also for stuck EGR.

Was this

answer

helpful?

Yes

No

Thursday, June 5th, 2008 AT 2:37 AM