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Cleaned IACV, No Help 900 1994

posted by  jd620 on  Mon Oct 1 12:20 CST 2018
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last visit: Fri Oct 17 07:42 CST 2014
[RELATED]

Thanks Spook. Cleaning the IACV didn't help. I actually cleaned it twice with Throttle body spray.

Could the temp. sensor under #3 intake be bad?

The problem began after changing the timing belt and not right away. Right after I cleaned the throttle body and the IACV the first time everything was okay for a half hour or so and then all of a sudden the problem started when I started the engine i.e. idles at 1300 or so RPM. Normally idle speed is 750-800 RPM. I have also checked the throttle body microswitch 2 wires that break connection above idle. I don't know what the 3rd wire does?

The car runs great on the road.

Besides the temp. sensor, I wonder if the ECU computer went bad. I have never had one go bad in the 34 years I have been driving 240s and 940s but I suppose there is a first time.

I 'd appreciate more ideas.
--
Mine:3-940s running, 1-740, 2-940 parts, dtrs:4-940s running






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