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Join Date: Mar 2003
Location: GA
Posts: 145
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<944> Dead Engine Speed Sensor?

Gruppe:

My 1987 944 NA will crank, but not start. There is no spark (grounded the plug while cranking the engine).

Fuel is fine though I have no checked pressure. New fuel pump and unplugging the rail at the front end indicates there is fuel at the rail under pressure.

I measured the resistance from center to rear-side pin of both sensors. Reference is 940 ohm and speed is 3 mega-ohm. Does that mean the speed sensor is dead? Center to forward pin (ground) is open on both.

Is a used sensor the way to go? The new sensor appears to be around $100.

Thanks in advance!

Neil Deshpande
1987 944 - new fuel pump and filter today along with quarter window installed with the help of instructions from this board!
Old 03-29-2003, 03:52 PM
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Join Date: Nov 2001
Location: Melbourne, Florida
Posts: 431
Quote:
I measured the resistance from center to rear-side pin of both sensors. Reference is 940 ohm and speed is 3 mega-ohm. Does that mean the speed sensor is dead? Center to forward pin (ground) is open on both.
I have heard that both sensors should measure out in the 900 ohm range, so I think you have found your problem.

Rob
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1986 951
Old 03-30-2003, 04:29 AM
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<944> Dead Engine Speed Sensor?

Rob:

Thanks! I'll order a used sensor tomorrow from Part Heaven.

BTW, what size wheels are those on your car? 18". I'm contemplating a similar purchase for my 87 NA.

Neil Deshpande
Old 03-30-2003, 05:05 AM
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