friends f250 prob
Thread Starter
CF Veteran
Joined: Mar 2010
Posts: 47,923
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
friends f250 prob
my friends 94 f250 5.8 will not start unless you squirt fuel into throttle body any ideas why
Junior Member
Joined: Aug 2010
Posts: 68
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From: shohola PA
Year: 85,88,95,98
Model: Cherokee
Engine: 2.8&4.0
ahh brings me bck to the days when a friend of mine had a ford. i cant tell for shure but it would first guess the fuelpump or if its has dual tanks the selector valve went bad (thats what happened to my friends truck.. stuck in the woods for like a month till we got a bulldozer out there). turn it on and listen for the fuel pump. then try jumping it out (be careful) if you hear nothing. good luck
Thread Starter
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
pump run fine do you now if theres like a cold start injector or something like that he put that sea foam crap in it and probs started like a day after also runs like crap when it starts ran perfect b4 sea foam,one thing the pump runs all the time when key is on
Junior Member
Joined: Aug 2010
Posts: 68
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From: shohola PA
Year: 85,88,95,98
Model: Cherokee
Engine: 2.8&4.0
honestly, im not sure at all. im not really a ford guy... mainly cause i dont like to be broken down lol. ill ask my friend with the truck as soon as i can and see what he says for you though.
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Joined: Jun 2010
Posts: 849
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From: Slaughter, LA
Year: 1997
Model: Cherokee
Engine: 4.0L
If the pump is running all the time, even if the engine is not running you're not building pressure, so either the bypass regulator is bad or the pump has crapped out.
When you turn the ignition on before you start the truck, the pump should run for a few seconds and stop when it builds pressure.
When you turn the ignition on before you start the truck, the pump should run for a few seconds and stop when it builds pressure.
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Senior Member
Joined: Jun 2010
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From: Slaughter, LA
Year: 1997
Model: Cherokee
Engine: 4.0L
I'll bet the only thing that was allowing the worn out pump to keep pressure up was the crap built up in it. The silly seafoam washed out the crap and now it has too much clearance to build pressure. Change the pump.
Thread Starter
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
this makes sense thanks,and could be the reason it searching for an idle also pressure than no pressure
Last edited by freegdr; Jan 28, 2011 at 10:29 PM.
CF Veteran
Joined: Feb 2010
Posts: 12,367
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From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Change the regulator and the pump on a Ford. Another 20 bucks for the regulator is cheap insurance. I had one with a ruptured diaphram in the regulator and it was sucking fuel right into the intake from the vacuum hose.
Thread Starter
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
CF Veteran
Joined: Dec 2010
Posts: 2,366
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From: Spanish Fork, Utah
Year: 1989
Model: Cherokee
Engine: Renix 4.0L
Originally Posted by freegdr
what i dont ungerstand is when you squirt fuel in it it starts and runs
Thread Starter
CF Veteran
Joined: Mar 2010
Posts: 47,923
Likes: 38
From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors