Runs bad when hot!!!!!
Thread Starter
|
New User
Joined: Jul 2003
Posts: 1
Likes: 0
Runs bad when hot!!!!!
I have a 94 5.8L F250. Purchased the truck used and from day one it has not run right. I replaced the following: Module, Rotor, Dist Cap. Spark plug wires, Plugs, O2 Sensor, EGR Valve along with EVP Sensor, TPS sensor, Intake Air Temperature Sensor, Bypass Air Idle Speed, Fuel Pressure Regulator,Engine Coolant Temp Sensor. The truck runs great when it is cold, usually for about 10-15 mins but when it heats up, it is more than sluggish, it has NO power. Occassionally backfires but not often. THe guys at a muffler shop noticed that the Catalytic converter was VERY hot and they suggested that i might have a stuck open injector, I checked 5 of the injectors with a NOID testor but i cant get to the other 3 without removing the throttle body,,,,which I am less than enthused about doing. COuld it be a stuck injector? I poured a pint of super injector cleaner in and nothing changed. I am desperate, PLEASE HELP.....short of jacking up the radiator cap and putting a new truck under it, i will go to any lenghts to cure this, my manlyhood is at stake here. PLEASE HELP ME!!
Posting Guru
Joined: Mar 2003
Posts: 1,349
Likes: 3
From: Cloud USA
Runs bad when hot!!!!!
You can check the codes with a paper clip, There is no reason spending any money on a reader. Looks like you replaced every sensor on your rig! One thing you should do is check the fuel pressure when hot. Some fuel pumps when they are ageing tend to puke out when running warm.
Freshman User
Joined: Jul 2003
Posts: 31
Likes: 0
Runs bad when hot!!!!!
Don’t forget to check the timing! It really made a difference on my 88 250 5.0. It was at 4 BTDC bumped it up to 12, and it runs much beater, throttle response improved to.
Just run a search and you will get tons of info on setting the timing and spout connector location.
Late timing can cause the cat to heat up and the truck to backfire.
Hope this helps
Tom Cat
Just run a search and you will get tons of info on setting the timing and spout connector location.
Late timing can cause the cat to heat up and the truck to backfire.
Hope this helps
Tom Cat
Freshman User
Joined: Jul 2003
Posts: 31
Likes: 0
Runs bad when hot!!!!!
Don’t forget to check the timing! It really made a difference on my 88 250 5.0. It was at 4 BTDC bumped it up to 12, and it runs much beater, throttle response improved to.
Just run a search and you will get tons of info on setting the timing and spout connector location.
Late timing can cause the cat to heat up and the truck to backfire.
Hope this helps
Tom Cat
Just run a search and you will get tons of info on setting the timing and spout connector location.
Late timing can cause the cat to heat up and the truck to backfire.
Hope this helps
Tom Cat
Thread
Thread Starter
Forum
Replies
Last Post
Mark Everett
1987 - 1996 F150 & Larger F-Series Trucks
3
Oct 29, 2016 02:01 PM
deere842
2.6, 2.8, 2.9, 4.0 & SOHC 4.0 V6
6
Aug 30, 2015 11:54 PM
timbersteel
1987 - 1996 F150 & Larger F-Series Trucks
11
Mar 18, 2015 05:57 PM
Phil Woolfson
1987 - 1996 F150 & Larger F-Series Trucks
4
Mar 16, 2014 10:16 AM
Traderjoe28
1987 - 1996 F150 & Larger F-Series Trucks
3
Mar 8, 2003 05:13 PM
