94 f150 5.0 4x4

Truck cranks and idles fine. Problem is If i hit the gas and let off while ideling in park the truck dies down and volts drop, lights go dim then it picks right back up and idles fine? It never cuts off just idles down low when i let off the gas then picks right back up? Dk what this could be.

 

Clean the idle air control and the throttle body.

 

I too have this idle problem, yesterday i cleaned the IAC. It didnt change a thing, any other ideas, possibly fuel pumps??



1993 f150 5.0 xlt extended cab

 

my 87 had this problem. a bottle of heet and lucas fuel injector cleaner helped more than anything else ive tried. idles almost perfect now. still a little funny when cold tho

 

mine only does it when its cold. where is the iac valve? can someone show me a pic? 89 f150 302

 

You know where the throttle body is? It's on the top center of the motor with two large black tubes running into the front of it (from the air filter). There may be a black plastic guard over the top of it - 2 screws will get that out of your way.

The IAC is bolted to the driver's side of the throttle body. It looks like a roll of quarters with a 2-wire plug on the front and 2 bolts attaching it to the throttle body.

 

http://www.fordfuelinjection.com/?p=39

 

I had a similar idle problem, replaced the IAC and it cleared it right up

 

i threw in a new fuel filter and its idling better than ever

1993 f150 5.0 xlt extended cab

 

.......................Get the rope boy's!!