chrisZ

Hi,

My max is acting up lately. It has 190K km on the clock and its running weird when at idle. When I start the car (hot or cold) it will idle high (1500 RPM), if I punch the throttle a bit, it will settle down below 1000 RPM. I know my exhaust pipes are going (rumble), and will be replacing them this coming weekend, but can the exhaust affect the idle? Perhaps if the exhaust leak is in the vicinity of a O2 sensor, it can affect the idle?

Any suggestions would be appreciated.
Chris...

svojs

Could be coolant temp. sensor, I guess.

QuiksilverMusic

ive been running into a similar problem as well, only not when parked, but when im sitting at a light stopped. im interested to know what the problem is as well.

jvckustumz

iTrader: (1)

i am having the same prob, i know its and old *** thread but my problem is the same, i have replaced my coolant temp sensor 2 days ago but it was doing it b4 then and it is still doing that so i doubt if it is that.

Double E

Remove & clean the IAC (idle air control) valve. It will be very dirty. Clean your TB while you're at it. It's a novice procedure and there are write ups around.

Let me know if you need more info...

kzoosho

iTrader: (16)

+1 on the iacv.

jvckustumz

iTrader: (1)

i cleaned both about 2 months ago, would they be dirty again???

Double E

Potentially, but no, not likely. Any chance the throttle cable is binding?

I would pull them apart again just because it's cheap and may provide some clues. The gaskets are the only thing to be careful not to tear up.

jvckustumz

iTrader: (1)

doesn't the iacv have a metal gasket, i may be wrong tho..

Double E

Yes it does.. Before it is mounted it has a "crush rib" that gets flattened out when the 3 bolts get tightened.

You'll see, on a new gasket that the rib is fully pronounced all around the edge. Using an old one might not seal all the way....but it would probably throw a cose if it didn't...right?

I also got to thinking....when you pulled the IAC last time, did you also remove the brass cap on the back by taking out the little phillips head screws? I found plenty more stuff n there to clean out. They are tight, so get a good fitting screwdriver...
I also removed the beige electrical connector that the plunger is mounted to and noticed there is a spring inside. It appears to acutate the plunger so I made sure it could travel fully.

I can't think of much else save for maybe the battery is getting weak and the alternator is trying to charge it after it is running....