on my 89 4x4 automatic wagon, it ran awesome till it got really cold out. now it wont idel when its cold. if it does it will run at about 600 rpm till it warms up a little then cough and take off ideling normal. any suggestions?

 

matt

I would check the IAC (idle air control) valve. maby the temp sensor.

only thing, if it were the temp sensor wouldnt it have a hard time starting? that valve dealy i sprayed some carb cleaner down there. i might have to look for another one and try that. it sucks when its this cold to sit int he car to let it warm up

 

matt

I had the wiring go bad to the IAC - would not idle unless you held your foot on it until it warmed up, and would die at stops sometimes. Had to run a new line from the connector at the driver's fender to the valve. Test everything!

now that sounds just like my problem, with out stalling at stop signs, today it started to go crazy at like 3500 rpm so i took out a huge wrench and beat that idel control valve and it started to come down to normal. maybe that thing is bad? ill test some stuff tomorrow after work thanks

 

matt

Man, if you beat me like that, I'd be good too!

 

Wiggle your connectors when you are testing things - mine was somewhat intermittent. I fixed connections at both ends before just saying f- it and putting in the new wire.

Not to be stupid, but could it have something to do with the Air Control Valve not opening when you are cold starting and also idling?

If I have my ideas and concepts wrong, please correct me.

 

Luke

fixed her.... pulled off the hose to that idel control vavle and sprayed carb spray down it as i was revving it up. works awesome now. thanks all for your help

 

matt