code 42

1988 CHEVROLET 1500
2,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
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KZUELICH
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i am getting a code 42. i replaced the distributor, knock sensor, and ECM. is there away to test the ESC module?
Oct 11, 2017 at 1:40 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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STRAILER
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You can take it to an auto parts store they have a special machine that can check it for you.

https://www.2carpros.com/articles/buick-cadillac-chevy-gmc-oldsmobile-pontiac-gm-1983-1995-obd1-code-definitions-and-retrieval-method

I would start by replacing the ignition coil that is usually what that code means. I would check the module anyway.

Please let us know what happens.

Cheers, Ken
Oct 12, 2017 at 11:36 AM
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KZUELICH
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Okay I will change the coil. got one here at home on Monday when i am off .
Oct 12, 2017 at 1:33 PM
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KZUELICH
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i think i found the problem the wires from the distributor to the coil are not even connected will replace on payday.
Oct 12, 2017 at 2:16 PM
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STRAILER
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Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
Oct 13, 2017 at 10:00 AM
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KZUELICH
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ok made coil wires. still ran like crap. put a new coil that i had still runs like crap anything else i need to test.
Oct 17, 2017 at 2:03 PM
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STRAILER
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Please pull the spark plugs and check there condition. If you can snap a picture of them and upload it here. If they are okay I would suspect an ignition module.

Oct 17, 2017 at 5:45 PM
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KZUELICH
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ok will do
Oct 18, 2017 at 6:06 AM