1997 GMC C2500 97 GMC Sierra -- No Spark

Tiny
MIDGET777
  • MEMBER
  • 1997 GMC C2500
  • V8
  • 4WD
  • AUTOMATIC
  • 161,000 MILES
I have a 97 Sierra, and as I was driving it died on me. I have replaced coil and ignition module, and still don't get a spark. I also checked the distributor. What else could it be?
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Tuesday, June 2nd, 2009 AT 8:44 AM

11 Replies

Tiny
RACEFAN966
  • EXPERT
So tell me what have you checked? Have you checked the cap and rotor and wire's? How do the plugs look? Let me now what you have checked and we will go from there.
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Tuesday, June 2nd, 2009 AT 9:21 AM
Tiny
MIDGET777
  • MEMBER
I have replaced the coil, and ignition module, I got shocked when checking the distributor cap, so I figured that worked.
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Tuesday, June 2nd, 2009 AT 9:31 AM
Tiny
MIDGET777
  • MEMBER
Plugs are a dark brown, they look good. I have checked for spark on the plugs, but haven't done anything else with the wires.
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Tuesday, June 2nd, 2009 AT 9:39 AM
Tiny
RACEFAN966
  • EXPERT
So you said you got shocked at the cap but no spark to the plug is that what I understand? How did you check for spark at the plug? I have found these caps go bad alot more so if it a brass tip cap over the aluminum ones. Now did you pull the cap and look inside it? They corrode really bad inside so if you didn't please pull it and look at the underside of the cap. I have had them towed to me and all it needed what a new cap and rotor. Let me know what you find ok.
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Tuesday, June 2nd, 2009 AT 9:48 AM
Tiny
MIDGET777
  • MEMBER
It looks like the rotor that has some corrosion. I am trying to post a picture.


http://www.2carpros.com/forum/automotive_pictures/363877_upload_1.jpg



http://www.2carpros.com/forum/automotive_pictures/363877_upload2_1.jpg

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Tuesday, June 2nd, 2009 AT 6:27 PM
Tiny
MIDGET777
  • MEMBER


http://www.2carpros.com/forum/automotive_pictures/363877_3_1.jpg




http://www.2carpros.com/forum/automotive_pictures/363877_4_1.jpg

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Tuesday, June 2nd, 2009 AT 6:33 PM
Tiny
RACEFAN966
  • EXPERT
Ok it don't look like it is too bad. So tell me if you put a philips screw driver in the coil wire and put it near metal like the valve cover and crank it does it spark? I also need to know if you truck has a cam sensor it should be on or near the timing cover I have included a pic of what it looks like. I would like to run a couple of tests on it. Let me know what you find.


http://www.2carpros.com/forum/automotive_pictures/249564_491434_1.jpg

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Wednesday, June 3rd, 2009 AT 10:19 AM
Tiny
MIDGET777
  • MEMBER
Actually I replaced the rotor, and it was the problem. I replaced that and the cap, and it runs great.
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Wednesday, June 3rd, 2009 AT 10:21 AM
Tiny
RACEFAN966
  • EXPERT
Great it was hard to see the rotor as far as the middle where it likes to burn and ground out the spark. That must have been what happened. Anyway that is great glad to hear it lives. If there is anything else please feel free to ask. Thanks again.
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Wednesday, June 3rd, 2009 AT 10:23 AM
Tiny
MIDGET777
  • MEMBER
Thanks for the help, without your questions, I would have had it towed to a mechanic.
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Wednesday, June 3rd, 2009 AT 10:54 AM
Tiny
RACEFAN966
  • EXPERT
That is no problem it is how I run my shop too. I don't like wasting money and customers don't either. So you are quite welcome. If you have anything more problems feel free just ask.
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Thursday, June 4th, 2009 AT 9:55 AM

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