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Old 08-18-2014, 09:46 AM   #1
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Does your RPM go to zero when you lose your power (even though the engine is still turning?) If so then Crank position sensor. When that fails you won't get any spark.
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Old 08-18-2014, 10:33 AM   #2
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Originally Posted by steved0x View Post
Does your RPM go to zero when you lose your power (even though the engine is still turning?) If so then Crank position sensor. When that fails you won't get any spark.
We had something similar on our 944 race car, but it didn't require a restart.
Engine would cut in and out. Tach would drop to 0 then wake back up,
rinse and repeat. Was a challenge to drive.

Turned out to be an overheating ECU.

Mike
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Old 08-18-2014, 05:08 PM   #3
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Originally Posted by steved0x View Post
Does your RPM go to zero when you lose your power (even though the engine is still turning?) If so then Crank position sensor. When that fails you won't get any spark.
I started looking at the data recorder. The RPM just go flat and start to drop as I slow until I hit the clutch and turn off the key where it drops sharply then as the key goes back on the rpm raise again. The data recorded is tied to a common point for the Tach. So although I don't remember seeing it drop the data recorder would say it did not drop out.
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