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Erratic idle 302 5.0

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Old Sep 5, 2012 | 08:51 PM
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minnesotafisherman's Avatar
minnesotafisherman
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Erratic idle 302 5.0

The '92 in my sig has an erratic idle. It's usually idles nice and smooth when I first start it up in the morning, and usually when I get somewhere and I put it in park it begins to idle really high. What's up with that?

Looks like the distributor cap/rotor and ignition coil are original. Should I begin there? Seems like it's timing related.
 
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Old Sep 6, 2012 | 08:19 AM
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Freightrain
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IAC sticky? Pull it off, clean it up with some brake clean. Make sure valve inside moves easily and no sludge on seat areas.

Usually they stick open which leans it out and makes them stall.
 
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Old Sep 6, 2012 | 09:09 AM
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Thanks, Freightrain.

I'll try that today.
 
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Old Sep 7, 2012 | 08:56 PM
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dad50+
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Had problems what I believed to be a 305 in my LeMans years ago. Put a carb kit in with no improvement. then I had the catalytic converter changed... found out it was a 351 orange block and lost some rubber comin outta the garage!
 
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