stalls when cold, until warms up
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Elder User
Joined: Nov 2010
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From: Ocean County, NJ
stalls when cold, until warms up
'88 351, c6.
idles high, maybe 2000 ,retarded timing, back out idle screw.
Today, started up, warmed up for maybe a minute put it in gear an drove away to store. restarted it, no warm up time, put in gear, hit throttle, and DIED.a bunch of times. Started up, put in gear, let it drive towards home at idlew/o hitting throttle, drove 1/2 mile an felt like it was gonna stall, pulled over, left foot brake, right foot gas pedal, and it friggin took off, no more problems driving 3 miles back home WTH. HELP !!
idles high, maybe 2000 ,retarded timing, back out idle screw.
Today, started up, warmed up for maybe a minute put it in gear an drove away to store. restarted it, no warm up time, put in gear, hit throttle, and DIED.a bunch of times. Started up, put in gear, let it drive towards home at idlew/o hitting throttle, drove 1/2 mile an felt like it was gonna stall, pulled over, left foot brake, right foot gas pedal, and it friggin took off, no more problems driving 3 miles back home WTH. HELP !!
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
88 351 doesn't or shouldn't have a idle adjustment screw unless its a carbed model.
EFI's idle speed is controlled by the computer, the throttle body has a stop screw locked in place and never needs adjustment. Well unless someone turned it, needs reset to prevent throttle plate from digging into throttle body.
The IAC may be the cause of your idle issues if it varies, if high but steady all the time might be vac leak or leaks. May also cause stalling.
The stalling out cold could also be ECT and or ACT sensors, run the self test and pull the CM codes, see what if anything the computer will tell you.
Self test is always the best place to start.
Ford Fuel Injection » How To Run a Self-Test
EFI's idle speed is controlled by the computer, the throttle body has a stop screw locked in place and never needs adjustment. Well unless someone turned it, needs reset to prevent throttle plate from digging into throttle body.
The IAC may be the cause of your idle issues if it varies, if high but steady all the time might be vac leak or leaks. May also cause stalling.
The stalling out cold could also be ECT and or ACT sensors, run the self test and pull the CM codes, see what if anything the computer will tell you.
Self test is always the best place to start.
Ford Fuel Injection » How To Run a Self-Test
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
That often helps if the valve is dirty but the electric solenoid itself is still good.
Remove and flush the valve end with some carb cleaner, easy enough to do and zero/low cost test, especially if a guys already got some carb cleaner on hand.
Clean it in a valving end hanging down orientation so the carb cleaner doesn't flush any junk into the electrical end of the IAC.
Remove and flush the valve end with some carb cleaner, easy enough to do and zero/low cost test, especially if a guys already got some carb cleaner on hand.
Clean it in a valving end hanging down orientation so the carb cleaner doesn't flush any junk into the electrical end of the IAC.
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Elder User
Joined: Nov 2010
Posts: 731
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From: Ocean County, NJ
i'm hoping its something easy, just bought this truck an already blew up a gas tank, and getting the old hole ready for a bronco 32 gal tank.
Noticed theres a car c6 in it, dipstick tube comes upto exhaust manifold, theres some kinda oil leak somewhere,and looks like the front pump seal on trans leaks. Both upper balljoints are shot, an both inner tie rod ends are bad, and the steering shaft has 4" of play on the steering wheel. i need some kinda break today.....lolol
just keep saying spray the iac lolol
Noticed theres a car c6 in it, dipstick tube comes upto exhaust manifold, theres some kinda oil leak somewhere,and looks like the front pump seal on trans leaks. Both upper balljoints are shot, an both inner tie rod ends are bad, and the steering shaft has 4" of play on the steering wheel. i need some kinda break today.....lolol
just keep saying spray the iac lolol
Fleet Owner
Joined: Aug 2005
Posts: 23,668
Likes: 301
From: Easton,Ks
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Elder User
Joined: Nov 2010
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From: Ocean County, NJ
i can pull elec conn. off iac an still runs at same rpm as with it connected.
i noticed it does it when it runs hot, almost over heating hot
i noticed it does it when it runs hot, almost over heating hot
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Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Here is a link with some information about it:
Ford Fuel Injection » Idle Air Bypass (IAB)
Also check for voltages and wiring at the TPS and the IAC.
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