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Car STICKS at certain RPMs?

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Old 06-26-2004, 06:03 PM
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Default Car STICKS at certain RPMs?

OK, I was going down the road the other day...car was at about 2500 rpms. I depress the clutch and start coasting, but my RPMs stayed at about 1700 for probably 30 seconds before going back down! OK, if that wasn't weird enough, today I was going down the road havin a little fun and I realized that if I revved the car while my foot was on the clutch, it would come back down VERY slowly through the RPMs. Could this be a clutch problem? This happened at the track several times with my old clutch. I now have a spec 3 with 1500 miles on it. This is very odd. Any help would be greatly appreciated. Thanks.
Old 06-27-2004, 11:56 AM
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Got a sticking IAC? Are you riding the clutch to get this to happen?
Old 06-27-2004, 12:36 PM
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That's a good question. When this happens, I am coasting down the road with the clutch in.
Old 06-27-2004, 01:28 PM
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My car does this too.. I do not think its the clutch.

Peace,
Josh
Old 06-27-2004, 01:47 PM
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I think wrencher might be onto something with the IAC. I wonder how I could check that...
Old 06-27-2004, 01:58 PM
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mine also did it at the track friday after my burn out it would stay at like 1800 rpms and then i pushed the gas again then it came down! Is their a way to fix it?
Old 06-27-2004, 02:46 PM
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Mine also sticks after burnouts, and only recently has done it on the street in normal driving. I'm going to check into this a little more and see what I can find out. I'm glad to see im not the only one havin this problem.
Old 06-27-2004, 03:09 PM
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I dunno if this is the problem or not but waaaay back in the day I had a 5.0 Mustang and one night I was leaving work and after a WOT run the gas pedal stuck to the floor and I had to pry it up with my toe. Next morning went out and looked at it and the throttle body was king gummmed up and sticking so I sprayed it with cleaner and fixed it.
Old 06-27-2004, 11:18 PM
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Make sure the throttle bore & IAC are clean. The PCM does keep the rpm up to help shifting & act like a dashpot to keep motor from stalling. It's like a built in rev match, for lack of better terms. It's hard to say if it is an actuall problem over the board.
IAC's have been known to become sticky with age, but usually other complaints result also.
It sees so many RPM & MPH = a predetermained IAC command.



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