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5sp. is bucking, and running like an AUTOMATIC. Help!
Posted by scr (more from scr) on Mon, 22 Oct 2001 15:56:40
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While I was away for the weekend, I let my father borrow my car. Its a 1994 900s non-turbo. When I got back he told me it was bucking like crazy when he took his foot off the accelerator in 1st or 2nd gear, while the RPMs were at 2500 or above. I thought it was his bad driving....but I was wrong.
This morning I started the car. It started fine but immediately started racing. The RPMs were climbing towards 4000 when I was parked in nuetral! When I engadged the clutch, no difference until I got to the "sweet spot". The car started moving, without my foot on the accelerator. It was like my car was and AUTOMATIC, creaping along without giving it gas.
This continued to the point when I was driving at 10 MPH without my foot on the gas. As I started up the road, when I shifted from 1st to 2nd the RPMs raced back up while the clutch was engaged. They returned to normal as I let the clutch out and gave it gas. Cruising along in 2nd. gear around 25 MPH, the car started bucking like crazy when I took my foot off the gas. I turned around and came home. As I pulled into the driveway, the CHECK ENGINE light on the dash came on. The exuast didn't smell so great.
My questions are:
-Are the two problems described (the racing engine and the bucking) related?
-What could have caused them?
-Is it the O2 sensor? Would that cause the bucking? doesn't seem like it.
Any help is greatly appreciated. Thank you!!!
posted by 63.20.20...
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