If it has the notoriously bad Carter BBD carb, you can remove the venturi's and drill them out as they have a tendency to plug up. A webiste that has the blow by blow info on how to perform this is http://rubicon.off-road.com/Jeep/tech/engine/carter.html. It is rather easy to do and will help to keep the venturi's from pluggin ing hte future.
carbs need to be rebiult
you did not say if was carb but if so spray pump in the carb is a good place to start
if u'v opened the idle compensator on top of ur carb check for leak there check the carb seat gasket for cracks and check bottom screws some of them will leak if they're not tight enough
1989 Celebrities are fuel injected, there is no carb.
No fuel injection started in 1991. they took the 2.5 from the XJ actually in 1991 that's why it fuel injected. Yours is TBI or carb. The 2.5L should be fuel injected in 1989.
Possible solution, given what facts I have... You might simply need to up your engine idle speed. If it has a carb, then it will most likely be accomplished by screwing your throttle set screw in or out where your throttle links to the carb. Adjusted correctly, your engine will usually idle higher in Neutral than in Drive. I don't know how severe your problem is, but this may fix your problem. Be smart. Be careful. Possible solution, given what facts I have... You might simply need to up your engine idle speed. If it has a carb, then it will most likely be accomplished by screwing your throttle set screw in or out where your throttle links to the carb. Adjusted correctly, your engine will usually idle higher in Neutral than in Drive. I don't know how severe your problem is, but this may fix your problem. Be smart. Be careful.
Dirt in the carb or carb out of adjustment or both.
If it is throtle body equipped, the idle control s solonoid controls it. If it has a carb there is an adjustment screw on the bottom of the carb.
May have an idle solenoid on the left side of carb.
There should be an idle setting on the side of the rochester carb.
There are a couple possible reasons. It could be a cracked carb boot that is letting unmetered air into the engine causing a lean condition. It also could be a cracked crank seal causing this problem. Check your plugs to see if it is running lean. Spray carb cleaner onto the carb boots when it is running to see if theres an idle change.
1989 Tercel does not have a carburetor, it is Fuel Injected. Wrong. My 1989 Tercel has a carb.