NEW CPS (by Shop) now runs rough/dies after hot

[spoiledred94]

Its been running super today. Finally got her back from the original shop. It took installing 4 diffferent brands of cps's to get one that didnt go bad.

[spoiledred94]

Well I hope somebody here will have some answers for me. its been running almost perfect for over a week. there was always a faint miss at idle but I tried not to worry about it. Then yesterday it started missing more, then badly. I checked spark at the coils and sure enough cylinder #2, again, was showing very bad to no spark. mostly none. I swapped out the coil-no better. swapped out the module and no change. I read that I may need to add a dedicated ground wire for the module. Better ideas, anybody?

[RJolly87]

What happens when you swap the wires on the coil that has #2 (I think the other is #5 maybe). Does the problem move to the other cylinder, or stay on #2?

[spoiledred94]

Thanks a lot Jolly!!! I got fed up and took it back to the shop yesterday. They say its the injector and they are replacing it now. I looked at my log and I replaced that injector myself in 8/2012. So it was two problems CPS and the injector. The symptoms were quite different and appeared one right after and I was out of ideas.

thanks a bunch to all the help I got.

Kris

[spoiledred94]

I had multiple problems.

Ignition mod.
CPS
Coils

[MKMike]

I had multiple problems.

Ignition mod.
CPS
Coils

Wow!
At least now it should stop killing ignition modules.

Thanks for posting the follow up!

[viper79]

"3)The last possible cause has to do with the charging
system.
If the rectifier
is beginning to fail, it will allow an
unhealthy amount of AC voltage to enter
the vehicle’s electrical system. Given
enough time, this AC voltage will cause an
ignition control module failure. It may also
damage other vehicle electronics.
To measure the amount of AC voltage that is
present in the electrical system, attach a digital
voltmeter to the battery and select the AC voltage
scale. While the engine is running you should not
see more than .5 AC volts on your meter."

Can we get this to be a sticky somewhere? This can cause a lot of headaches.