where is the IAC located?

 

the diagram .. nr 8

 

Had another idle problem with the old F150 ('95 with a 5.8L V8). After the initial warm-up, when the RPMs lowered, they really lowered - to the point where I felt it necessary to tap the accelerator to keep the engine from dying. After a couple more minutes of rough idling, the truck would CLICK and then everything was fine. This got progressively worse and eventually the problem continued until after I drove the truck about a mile down the road and then CLICK, everything was fine. Went through everything I could think of, including what was mentioned in this and other posts. Then I learned two things:

1) A battery on its way out can cause an idle problem so have it tested. I idle problem got progressively worse over a 6 month period until one morning... I couldn't get my engine to turn over. Jumped it. Took the battery in. Had it tested (it was bad). Put in a new battery and Bingo! My idle problem was completely gone.

I thought I would clean everything up real nice to ensure that I had a good connection for the new battery... and then this...

2) Even if you clean the terminals on your new battery (with a wire brush) and clean the battery cable connectors (with a wire brush, water & baking soda) and snug up the cable connectors PRIOR to greasing the terminals (to prevent corrosion), even if you used so called "electrical" grease, the grease can find its way between the terminals and connectors and cause a short.

I found this out one evening, right around sunset, when I turned my headlights on and my truck darn near died in the middle of rush hour traffic. Turned the lights off and it came back to life. Tried the lights one more time...nope, better pull over. Took me a while (long while) to figure out that it was the grease causing a bad connection between the battery terminals and the cable connectors.

There was absolutely no grease on the terminals or connectors when I connected the cables to the battery. But I did goop it up pretty good when everything was snugged up. The grease still managed to find its way between everything and cause an electrical problem.

Hope this might help someone out there.

 

Always fun to bring an old thread back from the dead.

This is good stuff, and I've experienced the same trouble with a low battery. People overlook simple stuff like batteries and grounds sometimes.

Rep for you.

 

Wow! I had the idle problem for a while. Even the mechanic couldn't put a diagnostic on it. I took my truck out of the shop $450 later. Thats what he charged me for trying to work out the problem. My battery has been bad for a while and I just replaced it. I didn't really take notice of the idling deal as it wasn't all the time and I guess I got used to it. Not until I read this thread and thought to myself that my truck has been idling great since new battery. Never would have guessed that. Thanks!

 

wow lol its an old thread allright just when i got my truck from my dad.. and starting to fix it up.. now i sold it and building a better one

 

i have 95 f-150 5.0 when im at like 30 or 40 mph and hit the gas pedal just a little it feels like the timing is off or something.i changed the plugs cap rotor oil egr sensor and egr valve i dont know what else to do?