1989 Honda CRX irregular idle

1989 HONDA CRX
196,000 MILES • 4 CYL • FWD • MANUAL
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PUNKJAMMER22
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My Crx has an idling problem. When I start my car(being a cold engine when started) the engine seems to run just fine, but once it is warmed up it revs up and down at a steady pace. why is this?
Feb 3, 2008 at 12:26 AM
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BRUIZER
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Engine temp. sensor is faulty...detects cold engine instead of warm...
Feb 3, 2008 at 5:31 AM
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PUNKJAMMER22
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Which temp. sensor? I'm having trouble trying to locate it. There are a few sensors.

1)--(TW)---coolant sensor
2)--(IAT)---intake air sensor
3)--(PA)----atmospheric sensor

Sorry I'm a little lost :(

-Eric
Feb 3, 2008 at 8:30 PM
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PUNKJAMMER22
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I have an '89 CRX 1.5 w/ 196000 on it.

My question never got an answer.

My Crx has an idling problem. When I start my car(being a cold engine when started) the engine seems to run just fine, but once it is warmed up it revs up and down at a steady pace. why is this?

I repaced the engine temp sensor, but it keeps happening, why?!
Mar 5, 2008 at 5:49 PM
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CONSV
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Make sure your coolant doesn't have air in it....bleed it good.
I had the same problem on my crx and I bled out the air and it fixed the problem
Aug 3, 2009 at 7:58 PM