Pelican Parts Forums - <944> Dead Engine Speed Sensor?

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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!

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

<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