My car idles from about 400 rpm to 1000rpm and just keeps rising and falling between those ranges. It will idle fine for about a minute or so and then starts doing it. It also almost cuts off after I start it when it has been started after it has been run. Any ideas? I was thinking maybe Idle/Air Control. THanks.
I would check the IAC first. unplug it and see what happens
kornfan_88 -> Loping Idle (3/7/2003 7:18:42 PM)
The car is completely stock.
spike306 -> Loping Idle (3/8/2003 1:25:59 PM)
i had that same problem in an 88 gt. we simply just cleaned out the throttle body were the butterfly is. sometimes you will find a lot of build up there. also don't forget the tubing in the cold air kit
91GT5.0 -> Loping Idle (3/8/2003 5:44:11 PM)
Sounds like a vacuum leak. Check all the lines going into the intake, the FP Reg., line running from the smog pump, etc. . .
if nothing changes when you unplug the iac, spray carb cleaner on the vaccum lines one at a time and see if the idle surges
stalker92 -> Loping Idle (8/10/2003 4:06:53 PM)
MY idle sticks at about 1500 for a second then drops to 1000 for a for a couple seconds then drops to normal, and i cant seem to find the problem,I heard to do something with an oimes meter have any ideas?
ive seen a few things to cause this. first is the IAC, then the throttle position sensor, or maybe the map sensor. then you have vaccum leaks and so on.
