[92 sedan POS]

i have a 92 and a 94 sedan.....92 have 176k and 94 have 136k miles.....on a cold day in the morning....i start my car and let it sit there for a while to warm up.....then the engine start reving up and down around 1 to 1.5 thousand RPM.....is that suppose to be normal ?...what causes it ?...how do i fix it ?
thanks

 

[legend4life]

there was a thread on this already, search for it.
-fluctuating idle rpm-

(sumthin like that)

 

[simgarcha]

I have had the same problem with the fluctuating RPM's on a cold day. I have found that there are two things that can cause this problem. One is if the climate control is on when the car hasn't heated up yet. So what I do is let the car sit for 5 mins before starting the climate control and have had no problems. The other time this problem occurs is if I drive the car when it is still cold, I mean just starting the car and pulling out to move it or something. Depending on how far I have to move it since my driveway is huge, it causes the RPM's to fluctuate when the car is put into PARK again. Anyways, I hope this helps.

Sim Garcha
1991 Acura Legend LS
300,000 Kms and still going strong!

 

[FutureX 2001]

The Climate Control in my 94GS wont kick in, until after the RPMs have dropped below 1k I've noticed.

 

[Trojan Horse]

This is one of the known symptoms of a blown/leaking headgasket.

 

[ScotcH]

There is service bulletin for the throttle body which describes these symtoms. I can't remember if it applies to a 92, or just 91s.

 

[Acurate420]

what is a service bulletin?? i have a 91 coupe that the rpms fluctuate also.

 

[Avarice]

There were some recalls on 91 Legend Throttle body's I believe

 

[92 sedan POS]

i have both a 92 and 94 and they both does the same thing.