idle problem

[smoke187]

well my idle is stuck at 1000-1200rpm all the time now anybody have any idea to what it could be also the a/c button stopped working to kick up the idle and kick on the fan

could you also list everything that controls the idle

[Redline322]

There's an idle control screw on the top of your throttlebody usually under a rubber cover, you can manually adjust it there. Also, check the distributor that it didn't loosen up slightly and that could let it advance the timing and bump the idle up.

[almighty4wd]

if your AC button stopped working, and your idle is bumped up, they could be related. The AC when on sends a trigger to the ECU, bumps the RPMs up. I'd focus on the AC, get that working properly. If that doesn't solve it, then..something else.

The list of things that Bump the idle:
AC
Stoplights
PS pressure switch
Radiator Fan
Blower (depends on the setting)
Rear defrost
Headlights

There might be more, but I pulled that direct from the 95 EGT/92 Protege wire diagram I made. Should be mostly complete.

[smoke187]

i mean sensors an stuff that tells the ecu what to make it idle at something could have went bad

sometimes the idle would stay at 800 then after i shut the car off it would be 1000 then stay there until i drive it but now its just stuck at 1000rpms

[therieldeal]

the clutch and brake switches mess with the idle too

[smoke187]

is there anyway to find out whats causing it

last time i took it out it idled fine a/c button kicked up the idle like it should and turned on the fan then after driving it for a few min it started to idle high and the a/c switch didn't work like it should

[smoke187]

this is what i got from the fsm
DESCRIPTION - l Idle speed excessive after warm-up

[TROUBLESHOOTING HINTS]
Excessive intake air supplied to engine
1 Throttle valve not fully closed

2 Idle speed control malfunction
l Air valve not closed
l ISC valve stuck
l ISC valve connector disconnected
l A/C, P/S, or E/L signal sent to ECU
l Incorrect coolant temperature signal

[smoke187]

has anyone ever had a idle problem like this this has been going on for the pas 2 weeks before that it was running fine at 800rpm

[Beerizfood]

Not my vintage but heres a few ideas,
Carboned up throttle valve in the throttle body holding the throttle valve open.OR
Take the handle of a good sized screwdriver and rap on the IAC or BAC valve and see if it changes the idle ...indicates a stuck idle control valve.

[smoke187]

i guess i could give that a try

[Beerizfood]

Also check for free play in the throttle cable.Sometimes the bracket for the cable get moved and takes the slack out of it holding the throttle open.
If ur car has a vaf or door style air flow meter check to see if its stuck open a bit.
Ant dtc,s?

[SleptWithURWife]

I had a ****ty idle once, not like yours though. Anyway, I got a MAF off a BP in a ford. (the 1st BP I've even seen in person, and couldn't get it ) and it fixed my idle problem.

[smoke187]

i think it might be my iacv not to sure yet i don't have a spare throttle body to test this out but when i unplug it nothing happens

[Beerizfood]

take it off and tear it down,nothing too loose if its fubar.But i think its serviceable.Pay real close attention to what goes where.

[smoke187]

kind of hard to do when i need another tb to replace it so i will leave it be until then