#3, 4 pistons not getting spark.

PJSUPERCAT

MEMBER
2002 MERCURY COUGAR
6 CYL
FWD
MANUAL
117,000 MILES

#3, #4 pistons not getting a spark. I have replaced spark plugs, wires, coil, imrc cable assembly, and have nothing. Please help.

Tuesday, December 28th, 2010 AT 6:37 AM

6 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Inspect and test the crankshaft position sensor-on lower front of engine

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Tuesday, December 28th, 2010 AT 6:54 AM

PJSUPERCAT

MEMBER
4 POSTS

I have been troubleshooting wires from the coil to the PCM. Pin 3 (brown solid green stripe) read to pin 52 on PCM connector good for ohms. I was told it may be time to change out the pcm. Does this sound like it is going on the right track?

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Tuesday, December 28th, 2010 AT 7:56 AM

RASMATAZ

MECHANIC
75,992 POSTS

The CPS tells the computer which cylinders to fire-

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Tuesday, December 28th, 2010 AT 7:58 AM

PJSUPERCAT

MEMBER
4 POSTS

Ok I will go with that next. The how exactly do I test and inspect the crankshaft position sensor? Detailed instructions and an ipb would be mostly appreciated.

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Tuesday, December 28th, 2010 AT 8:14 AM

PJSUPERCAT

MEMBER
4 POSTS

I found out where the ckp is so now I have to wait for autozone to open up. Hopefully this is it man, it would do me a great deal of saved time and money. Especially money! About 40 bucks vice 500+ for the pcm. Going with the ckp first, thank you rasmataz.