1991 Accord Engine is Revving in Neutral

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mgasior

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My wife has a '91 manual transmission, Accord that just rolled over 200,000 miles. Lately, when she has been in neural, the engine will start to rev up to about 2000 rpm and then drop back down to about 1000, and continue this loop until she is in gear and drives away.

At first, this was an intermittant problem that seemed to go away after the engine warmed up, but lately it has been happening longer and longer, at times even when shifting gears.

Anyone know what might be causing this and how we might be able to fix it?
 
My wife has a '91 manual transmission, Accord that just rolled over 200,000 miles. Lately, when she has been in neural, the engine will start to rev up to about 2000 rpm and then drop back down to about 1000, and continue this loop until she is in gear and drives away.

At first, this was an intermittant problem that seemed to go away after the engine warmed up, but lately it has been happening longer and longer, at times even when shifting gears.

Anyone know what might be causing this and how we might be able to fix it?
Click to expand...

How full is the rad, how full is the reservoir, and have you recently done any work on the cooling system?

Is the temp guage stable? Good cabin heat?

'Curly'
 
We replaced the radiator just a few months ago (Aug or Sept, I can't remember) and we haven't had any problems with the temp gauge and cabin heat is fine. I will double check the radiator and reservoir, but would the rad cause the RPMs to jump up and down? I had thought it could be some sort of sensor, but I'm curious to know what you're thinking it could be since I hadn't considered the cooling system being the culprit.

Thanks for your post -- anything to help narrow it down.
 
We replaced the radiator just a few months ago (Aug or Sept, I can't remember) and we haven't had any problems with the temp gauge and cabin heat is fine. I will double check the radiator and reservoir, but would the rad cause the RPMs to jump up and down? I had thought it could be some sort of sensor, but I'm curious to know what you're thinking it could be since I hadn't considered the cooling system being the culprit.

Thanks for your post -- anything to help narrow it down.
 
We replaced the radiator just a few months ago (Aug or Sept, I can't remember) and we haven't had any problems with the temp gauge and cabin heat is fine. I will double check the radiator and reservoir, but would the rad cause the RPMs to jump up and down? I had thought it could be some sort of sensor, but I'm curious to know what you're thinking it could be since I hadn't considered the cooling system being the culprit.

Thanks for your post -- anything to help narrow it down.
 
O2 sensor...... 92 Accord did it.... 98 Accord did it.... Same fix.
 
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