Ignition Question

[Robogast]

Hello, I have a 87 7mgte, I am not getting spark, im getting fuel. the battery is good and all grounds are good. im not getting power to the ignitor or the coilpacks. I was wondering if it might be my ecu? Or if it might be the CPS? Any help would be great. Thanks,Josh

 

[jdub]

Wiggle the CPS wires while a helper cranks it

 

[Robogast]

Wiggle the CPS wires while a helper cranks it

If thats the case then is the CPS bad? or just the wiring?

 

[jdub]

90% of the time it's the wiring...either at the connector or shorting (from brittle, broken insulation) going into the CPS housing.

 

[IwantMKIII]

another thing to check......as you're turning over the engine...check to see if the tach moves. If it does the ECU is getting a signal from the CPS....if not....wiring could be bad or CPS itself could be bad

 

[Robogast]

Thanks alot guys, It was the CPS wiring. I replaced the engine wiring harness. That was the only thing electrical i think i havent gotten new from the dealer. But im in search of one in better condition or ill have to see if i can rewire it myself. The dealership wants more for it than i can afford. I mean way more.HAHA

 

[boosted88]

What is the cps?

 

[Robogast]

What is the cps?

CPS is the Camshaft Positioning Sensor.

 

[jetjock]

Meh...close enough