bikeboyben14

is there anyway to stop it from doing that. its really annoying and sometimes the idle drops really low and ends up killing the engine. i know im probally needing a tune but is there any tricks around it until i can afford it. thanks in advance

jrhaden

Try and clean out your idle air controller on the throttle body. That might help, it helped mine when it was doing that.

ROTTITANK

+1 spray a little carb cleaner in there and see what happens.

93must

A little more info on the car would be good! Did it just start doing it or have you done some mods to your car and now it does it? What year is it? Could be a bad TPS, timing, running rich, mass air meter, EGR, 02 sensors!

w8less

or it the IAC could be going bad. that F cam isn't going to affect the computer bad enough like it did in my old sn car. change or clean that IAC and i bet ur problem will be solved

AlabamaCobra

lol i thought this was just a fact of life for 5.0's

15austin

I heard of drilling an 1/8 hole in the throttle body butterfly will fix it. On the fire wall on the vaccuum tree there is a port that is plugged off, take that cap off will fix the problem.

AlabamaCobra

there are several ports pluged off on my car...taking any of the caps off will make it idle higher. btw anyone have any info on drilling the hole in the butter fly?

webslinger67

there is actually a fix for that Ford has, its a plate that goes between your IAC and throttle body that has a set screw in it that you can set the idle speed by feeding it some air from the IAC , thus keeping it from surging...

i have one on my 90 gt.... now, if i could just figure out why it wont hit 4000 rpms...sigh... that is another problem...

bikeboyben14

the car has some mods, 76mm mass air, 75 mm tb and egr spacer, C and L cold air, 24lb injectors, f cam, gt 40 heads. it also has a afpr but i dont have a pressure gauge to set it just yet and a 255 lph fuel pump. i just put new o2 sensors in today and hasnt helped. im gonna try to clean the iac and see what happens and then maybe tryin drilling a hole in my tb