1999 Saturn SC1 no spark @ cyl. #2 & #3

Tiny
JKINARD
  • MEMBER
  • 1999 SATURN SC1
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
This car began to run sluggish with very little power the other day. The check engine light came on. I found out that cyl. #2 and #3 were not getting any spark. I checked the wires, both coils and the ignition module of which there was nothing wrong with any of them. I asked the guy at autozone where I had the module checked what else could it be and he said the only thing left to check was the crankshaft position switch or the computer. Is this true? If so, where is the cps located on this car?
Tuesday, September 28th, 2010 AT 2:20 PM

8 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Hi
Did Auto Zone check for codes? If yes post code in P0xxx format if no go bacvk and have codes read.
Let me know Thanks for donate
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Tuesday, September 28th, 2010 AT 2:24 PM
Tiny
JKINARD
  • MEMBER
  • 47 POSTS
No they didn't. The car is parked at home. I didnt want to drive it.
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Tuesday, September 28th, 2010 AT 2:37 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
How where coils checked? is there power to DIS on pink wire?


https://www.2carpros.com/forum/automotive_pictures/198357_Graphic_629.jpg


How was DIS module checked?swap coils if problem goes to 1-4 then coil bad.
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Wednesday, September 29th, 2010 AT 10:33 AM
Tiny
JKINARD
  • MEMBER
  • 47 POSTS
I swaped the coils. I switched 1-4 with 2-3 and still no spark. I switched 2-3 with 1-4 and there was spark. In other words, both coils worked on 1-4. I removed the module from the engine and had it tested. They said it was good. The only thing left to check is the CKP and the the PCM. If the other components are working, why would there be no spark at 2-3? There is 12+ volts coming from the pink/black wire on the harness that connects to the module.
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Wednesday, September 29th, 2010 AT 1:00 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
O.K. PCM grounds coil to fire so you have eliminated all but PCM Crank sensor would not cause problem most likely fuel pump would not operte if crank out.
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Wednesday, September 29th, 2010 AT 1:18 PM
Tiny
JKINARD
  • MEMBER
  • 47 POSTS
Seems like it should be one of the coils. I will take them to have them both tested anyway.
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Wednesday, September 29th, 2010 AT 1:28 PM
Tiny
JKINARD
  • MEMBER
  • 47 POSTS
It was the module. I dont know why they told me that it was OK. Thanks anyway. It was a big help!
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Friday, October 1st, 2010 AT 1:24 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Glad to hear maybe when they tested module it showed good
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Saturday, October 2nd, 2010 AT 12:23 PM

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