My car just didn't start after work a couple of days ago... No spark to plugs..
No spark out of coil.

Replaced coil.... nothing...

Hooked up the scan tool, saw no RPM coming from Crank Position sensor.
Replaced that, still no start.

I "assume" (Correct me if I'm wrong)the only two things that allow the coil to have spark is the Crank position sensor and the ICM.

So I replaced the ICM, still nothing... I'm at a stand still..
It just turns over, doesn't even try to bump over.

Thanks
Kris

 

did you replace the coil as well?

 

yes sorry, that was first start.
I had an extra

Kris

 

I have personally bought 2 bad ICM's in a row, take it back and have them check it or swap it out if possible

 

FWIW, the crankshaft position sensor is only used to detect misfires and won't cause a no-start condition.

Check this procedue: http://shbox.com/1/4th_gen_tech2.html#opti_test

 

check signals at coil/icm harness, if no pulse is comming from ECM/ or comming from opti, check opti harness for continuity,if good,.... R/R opti properly ....my moolah is on the opti
<~Mike~>

 

It was my Opti pig tail... had a lot of corrosion on pins...
all good now.
thanks guys

Kris