Feathering Throttle keeps it running
Thread Starter
|
Freshman User
Joined: Sep 2006
Posts: 31
Likes: 0
Feathering Throttle keeps it running
89 F250 460, this will test your knowledge. I can start the engine and it will run only while feathering the throttle, if you don't it will slowly die but starts right back up with no black smoke or smell. It will not idle on its own and will not stay running long enough to check for vac leaks although I did a visual check and all appeared ok. This is a conversion engine so I don't know how to read codes w/no light. I replaced the O2 sensor, EEC, and the Coil , there is no Cat because the truck is an 1986 but the motor is an 1989. The TPS seems to check out w/ no spikes while testing.
I am a little stuck at this point and need help
I am a little stuck at this point and need help
Posting Guru
Joined: Jul 2009
Posts: 1,069
Likes: 1
From: Toledo, Ohio
No, mine is bad also and its still running. Just hurts mileage (that im aware of). Its an expensive little bugger.
Sorry man, im out of ideas without looking and tinkering. Just double check that vacuum lines are good and closed (not broken) and that wires look ok also. Hopefully somebody else with a lot more knowledge will see this tonight and by morning you may have something.
Good luck. Sorry I couldnt help out more.
Sorry man, im out of ideas without looking and tinkering. Just double check that vacuum lines are good and closed (not broken) and that wires look ok also. Hopefully somebody else with a lot more knowledge will see this tonight and by morning you may have something.
Good luck. Sorry I couldnt help out more.
Thread Starter
|
Freshman User
Joined: Sep 2006
Posts: 31
Likes: 0
Trending Topics
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Since the trucks has been upgraded to EFI
I have to ask about what you're using for a fuel pump. If it's whatever was in it for the carbed motor then that's your problem.. it's not building enough fuel pressure, EFI needs a steady 40psi at the rail.
I have to ask about what you're using for a fuel pump. If it's whatever was in it for the carbed motor then that's your problem.. it's not building enough fuel pressure, EFI needs a steady 40psi at the rail.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 6 Best Deals Available on New Fords & Lincolns Right Now
Brett Foote
This Hennessey Takes the Expedition Tremor's Off-Roading Capability to the Next Level
Verdad Gallardo
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
This one with the digital readout takes all the guess work out of it.
Equus Innova EPI 3145 OBD-1 Ford Scan Tool Code Reader at Gadgets Galore!
Equus Innova EPI 3145 OBD-1 Ford Scan Tool Code Reader at Gadgets Galore!
Thread
Thread Starter
Forum
Replies
Last Post
okla_stampede
Ford Inline Six, 200, 250, 4.9L / 300
22
May 15, 2003 09:55 PM
jtb5616
1987 - 1996 F150 & Larger F-Series Trucks
2
Apr 8, 2003 12:29 AM
