Question about 1992 Mercury Capri

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Engine Quits at 3000RPM

Non Turbo Stick Shift SE Model 1.6L engine

When cold the engine quits at 3000 RPM and restarts on its own when revs drop 500 RPM. Quits at 2500 RPM when hot and restarts when revs drop 500 RPM. Starts and runs fine with plenty of power.

Dealer has replaced the Throttle Position Sensor and had the computer checked/repaired. Worked fine after that for three weeks. Problem has returned as before.

Took the car back to the dealer and they now say O2 sensor and catalytic convertor. Problem was not evident driving home from dealer. Reappeared two days later. And now running on three cylinders.

No engine codes

I am going through everything the dealer may have touched to look for intermittent wires.

Any suggestions as to likely problem area would be appreciated/

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Sounds like the dealer is shooting in the dark at your expense. If it was the O2 sensor, it would throw a code. Ofcourse, Fords drivability diagnostics was bad back then. I don't remember exactly how the ignition is set up on them. I would be looking at the trigger sensor for your ignition and ignition module.

Posted on Aug 27, 2008

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