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Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

1999 Suburban 2500 4x4 7.4 crank no start

  • YankeePaul
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3 years 5 months ago #55908 by YankeePaul
1999 Suburban 2500 4x4 7.4 crank no start was created by YankeePaul
Engine shut off while driving, dash warning "check gauges" Cranks but no spark. NO MIL, NO CODES

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3 years 5 months ago #55917 by Cheryl
Replied by Cheryl on topic 1999 Suburban 2500 4x4 7.4 crank no start
Check for spark directly out of ignition coil.

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3 years 5 months ago #55920 by YankeePaul
Replied by YankeePaul on topic 1999 Suburban 2500 4x4 7.4 crank no start
No spark nowhere

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3 years 5 months ago #55932 by YankeePaul
Replied by YankeePaul on topic 1999 Suburban 2500 4x4 7.4 crank no start
I'm thinking crank or cam position sensor

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3 years 5 months ago #55933 by Matt T
Replied by Matt T on topic 1999 Suburban 2500 4x4 7.4 crank no start

Engine shut off while driving, dash warning "check gauges" Cranks but no spark. NO MIL, NO CODES

Does the MIL light up on Key On bulb check? And can you view live data in the PCM?

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3 years 5 months ago #55945 by YankeePaul
Replied by YankeePaul on topic 1999 Suburban 2500 4x4 7.4 crank no start
I have an Autel scanner, I will check. I thought live data meant while it's running.

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3 years 5 months ago #55966 by 70monte
Replied by 70monte on topic 1999 Suburban 2500 4x4 7.4 crank no start
It could also be your ignition control module.

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3 years 5 months ago #55971 by YankeePaul
Replied by YankeePaul on topic 1999 Suburban 2500 4x4 7.4 crank no start
I hope so, it didn't throw a code. I will scan again today. With TeamViewer can someone get in and find what I can't? Hypothetical question.

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3 years 5 months ago #55974 by YankeePaul
Replied by YankeePaul on topic 1999 Suburban 2500 4x4 7.4 crank no start
Well now I have spark at the coil but my batteries will have to be charged. It's always something.

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3 years 5 months ago #56007 by YankeePaul
Replied by YankeePaul on topic 1999 Suburban 2500 4x4 7.4 crank no start
The issue turned out to be an unstable connection to the ignition control module pigtail. Thanks all.

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3 years 5 months ago #56013 by 70monte
Replied by 70monte on topic 1999 Suburban 2500 4x4 7.4 crank no start
I'm glad that you figured it out. The symptoms sounded like something ICM related and is why I suggested that.

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