Ray Swinney (207.69.139.145) - Sun Mar 12 21:51:19 2006

I have a 94 GEO Tracker that idles at 1700 RPM. Sometimes may go up to 2000 RPM. I put it in drive and it drops to 1200.

Reply #1 kirk (72.27.4.141) - Sat Sep 13 15:33:00 2008

my 1990 geo metro engine vibrates a lot after the trottle drops

also bucking when in low gear.

do you know where I can find the service manual?

Reply #2 chad ziesmer (173.18.28.27) - Thu Oct 23 23:56:59 2008

more than likely a vacume leak or a shot pc valve

Reply #3 Dave (216.231.62.5) - Tue Oct 28 11:37:09 2008

I had the same problem on my 92 Metro. it turned out to be the timimg belt was going bad and slipping. Replace it before it breaks, which could cause serious valve and or cylinder damage.

Reply #4 jimmy (174.21.142.203) - Tue Nov 10 18:37:06 2009

Dave. If a timing belt slips, the motor would not run. Timing belts have teeth. It can jump a tooth but it can't slip. If it did, your car would be toast. And if it jumps, you need to fix ur tensioner, timing belts don't slip, they break.

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