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Old 09-11-2005, 08:08 PM
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Re: code reader with out check engine light on?

The mechanic is correct about the engine light and the codes. If there is no light there probably won't be any codes in the computer. The car may be running badly for the following reasons. First, make sure that you gapped the plugs correctly, the more miles on the plugs the more critical the gap. Then change the O2 sensors, they could be wearing out and causing the fuel mileage to go . Next, check the catalytic convertor. You are close to the mileage where the cat could be starting to plug or simply wear out. This should be covered under the emissions warranty of the vehicle. Finally, the problem you are having with at 40 to 45 mph could be the torque convertor solenoid going bad. Have it checked out at a tranny shop. You may also want to change the tranny fluid and filter. Don't have it flushed however, just a fluid and filter change.
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