Subject...now residing in the Arizona desert and left my shop manual back home in California.

Car runs fine under throttle but idles 100-200rpm low, worse with the AC on. Bad enough to the point where it will stall when cold with the AC on for a few minutes until it's warm. Just need to adjust the idle up a couple hundred RPM, can't find it anywhere here on HT or the web.

Haven't touched anything under the hood, other than an intake & exhaust it is a stock engine '89 LX, DPFI.


Modified by bigrob119 at 10:30 PM 4/29/2008

 

C'mon now, don't tell me NO ONE knows. Help a brother out.

 

your ECU controls your idle....

there is a flat head screw on the throttle body... ive tried to play with it but never been able to increase my idle speed.

mark its original position so you can turn it back when nothing happens

 

 

Thanks a million for the pic.

Appreciate it my good man.

 

Mine did the same and i adjusted it at that point in the pic and now its fine..

 

Mine did the same thing, I needed to change out the pcv valves which had about 75,000 miles on them and for some reason i had to tighten the throttle linkage bolt on the thottle body. After that mine was fine havent had a problem since its been 3 months problem free.

I dont know if these items are it but might help

 

Adjusting the idle via the screw in the pic helped a ton, there's still an occasional stumble once in awhile that I believe is ignition timing related. +

The fact that I need to get off my *** and install my new O2 sensor (that I've had laying around for months) doesn't help either.

 

my occasional stumble was the pcv valve