gettna05!

My '98 Gt Idle Air Sensor went bad and it would cause the car to stumble and stall when started. Usually when cold. The Ford guys checked it by tapping it with a tiny hammer. I guess it wasn't opening all the way or something....just a thought. I don't have many thoughts so I try to use them as they float to the top....please don't waste it.

Scooterman

alrighhy.. just started it up.. yes u were right.. it stays at around 800 rpm for a few seconds.. then it idles up to around 1200-1500 rpms.. then goes back down.. then back up... does that help u to help me?

99saleen351r

Unplug the TPS sensor on the side of the throttle body(right were the tube goes into the intake) and see if it changes anything,if the car doesnt change at all the sensor might be bad

Scooterman

so the problem could be the sensor... not vacuum hoses? or both.. im sorry if they perhaps mean the same thing.. im just confused.

Scooterman

where is the idle air sensor located? b/c if u say that when u start the car and it stalls, then it gets rocky at idle, then its gotta be that sensor... i got an 87 5.0 lx... hopefully sum1 can help me locate the idle air sensor. thanks

NeoTokyo

If its a V6 then its naturally rough at idle.

Also check into your IAC (Idle Air controll) it govers the air/fuel going into your engine at idle and governs idle speed (RPMS)


good luck




-Eric-

NeoTokyo

As for the location of the IAC I think that it should be mounted on your TB somewhere and look kinda round with a couple wires coming out, its different for the years, mine is way different. Some are even remote and dont touch the TB at all.