2001 Ford F-150 Won't idle

EXCLUSIVELYFORD

MEMBER
2001 FORD F-150
V8
2WD
AUTOMATIC
180,000 MILES

Problem could possibly be Electrical or Engine related. Truck won't idle, instantly dies. If given gas, it'll stay running. Fires right off after cranking over maybe twice, but won't even try to stay running. Relays, filter, and fuel pump have been checked and replaced. Looking for opinions before I hit a mechanic up. My only thoughts is possibly the chip in the key gone bad and is cutting the fuel off due to Anti theft, because the fuel is cut off instantly as if it's electrical. Do they have a fuel pressure regulator that could have gone bad and isn't regulating the right amount to the engine and needing to be given gas? Ideas?

Saturday, November 14th, 2009 AT 9:59 AM

3 Replies

MERLIN2021

MECHANIC
17,250 POSTS

Check the filter in the transmission, it may have dislodged. I know but check it anyway! Check this if it dies when put into gear. Check the anti theft light on the dash, does it blink every 2-3 seconds? After you turn the key to on does it go on solid for 2-3 seconds then go out?On the throttlebody, locate the IAC(idle air control, remove it and see if its clogged with carbon.
IDLE AIR CONTROL SOLENOID Idle Air Control (IAC) solenoid is by-pass air type. Ensure ignition is off. Disconnect IAC solenoid harness connector. Measure resistance between IAC solenoid connector terminals. Solenoid has diode and resistance will be infinite if voltmeter is hooked up wrong. If resistance is not 6-13 ohms, replace solenoid. If resistance is 6-13 ohms, IAC solenoid is okay. See TEST KE under SYSTEM TESTS in SELF-DIAGNOSTICS - EEC-V - CNG & GASOLINE article for additional testing and specifications.

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Saturday, November 14th, 2009 AT 10:07 AM

EXCLUSIVELYFORD

MEMBER
1 POST

Stays on solid for 2-3 seconds. I'm purely a carb guy and I work on older cars where it's basic mechanics and no computer and basic electrical. I'll have to get a blueprint of the throttle body and find where the IAC is, but that sounds like a prime suspect. Especially at 180000 miles. Any chance on directions to the IAC on the throttle body?

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Sunday, November 15th, 2009 AT 11:08 AM

MERLIN2021

MECHANIC
17,250 POSTS

There are two electronic sensors on it, one is the throttl position sensor, real small with three wire connector, the other is the idle air control(IAC) long usually silver metal tube about three to four inches long, held on with two screws. Here's a picture, get the gasket too!