Twice today and once a couple days ago I cranked my car up and it imediately idled up to 3000 RPM's then over the next 20-30 seconds went back to the normal cold idle speed. Anyone encountered this before? Nothing else seems odd with the running of the car other than this. Does not seem to cause anything bad, but I was just wondering if this was a sign of something starting to go wrong.

 

Clean your IAC valve.

 

If this is occuring after the car was already warm (IE: went on an errand, parked, got back in, started up, 3000rpm. . .)

-then it could be a sign of a faulty ECTS (engine coolant temperature sensor)

If it's happening cold or hot, you might try cleaning your throttle-body 1st & see if it still misbehaves.


Also, see:

http://forums.maxima.org/showthread....hreadid=104931

 

just cleaned TB last week. It does not happen when it is totaly cold. If memory serves me right eack time was about 30 minutes to an hour after I had driven the car.

 

also all 3 times it happened while parked at my house where the car sits uphill. This might matter, might not, just thought I would throw that in.

 

Pull the codes from the ECU & see if you come up with anything. . .

Try unplugging the ECTS wiring harness and plugging it back in (freshen up the contacts)

Also, you could treat the harness contacts with dielectric grease to enhance conductivity.

Test the ECTS, using a multimeter.


Report back - this is your mission, should you choose to accept it. Your mouse will self destruct in 5,4,3,2. . .

 

I accept. My car idles at 3000RPM when i start up somtimes too. Happened twice also. As well, my car makes a grinding noise when I first start it in the morning. Its cold up here in Canada.

 

the highest for me @ idle was 1,200rpm, defintely clean our ur TB for better flow is the first step =)

 

Scroll UP &