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Acceleration only when coolant temp sensor disconnected but sensor is good 200 1985

posted by  tritone88 on  Mon Oct 27 04:02 CST 2008
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last visit: Fri May 24 18:30 CST 2013
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Hi Brickboarders,

I have a new 240 85 wagon automatic (LH 2.2 I guess). It has an acceleration problem when cold. It starts perfectlly everytime and idles great but as soon as I give it gas, it bogs and occasionally pops through the air cleaner until it warms up.

I replaced the following:

AMM (Air Mass meter)
Accordion intake hose from AMM to TB
Cleaned TB
Replaced and readjusted TPS
Cleaned flame trap
Checked all hoses for vacuum leaks
Replaced ECU inside of car
Checked operation of both fuel pumps (both are running)
Replaced fuel pressure regulator

Then it dawned on me this might have to do with the coolant temp sensor, duh!

I disconnected it and lo and behold the thing accelerates and runs perfectly when it is cold. No bog, no hesitation. So I replaced the coolant temp sensor thinking I finally found the probelem, reconnected it and the problem is still there!!!!! WTF???

So it only accelerates when it is cold with the coolant temp sensor disconnected.

Anybody got any ideas on what is going on?

Thanks...






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New 1 Acceleration only when coolant temp sensor disconnected but sensor is good [200][1985]
posted by  tritone88 subscriber  on Mon Oct 27 04:02 CST 2008 >


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