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chimalsu

missfire

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my 87 944s starts first time and runs fine through the gears,but missfires when trying to accellerate from 60 plus on the motorway.this happens even if i drop a gear and on a constant throttle.after a while it clears and runs fine until the next journey and the whole routine starts again.anyone got ideas

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this could be most likely speed/reference sensor related. the way to check is to get the problem going and scope the sensor.

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cheers maqcuda,been out in the car today without a problem,looks like its going to be intermittent,so not a lot i can do untill ithe problem comes back.

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I had a S one time that as soon as you hit 5000 rpm, no matter what gear it started missing like it was hitting a rev limiter. turned out to be the speed/ reference sensor

good luck

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