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How can I repair my car, the RPM goes up and down, wastes alot of gas.

(1993 Toyota Camry)
in Visalia, CA on December 12, 2012
the check engine light was on. i changed the coolant/temp sensor, and the engline light turned off. But, the RPM gauge still has a malfuncion, it goes up and down. There is strong odor of gas and the car wastes a lot of gas. It has not passed smog. I took to a shop and they claim to have changed the O2 sensor, but this one looks very fragile/small. The check engine light turned on about 20 miles from the shop. I was not happy with their service. They told me to take it back, but I really don't want to. I want to fix the car myself. I've had bad experiences with mechanics/shops. please help.
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Popular Answer
of Greg's Orange Auto on December 12, 2012
the only tells you which circuit has issues not the sensor. what is the code?
on December 12, 2012
You want to fix your car yourself? O-kay...first I would try to solve your "check engine" light...you will have to jumper the DTL to get the code(s).
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