Diagnostic Circuit Check

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May 5, 2005 | 10:21 PM

C4newbie

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Diagnostic Circuit Check

My service engine light was on constantly while running so I purchased a GM Code Scanner. Error code indicated bad MAF, so I replaced it and reset the computer. Now this first time I run the car the Service engine light stays off and every thing runs fine...the next time the service engine ligth returns so I hooked up the scanner and the light does not blink to start indicating that I need to perform a 'diagnostic circuit check' refering to a chart in the vehicle service manual. The only one I have at this time is the HAYES manual which does not mention this chart. Any ideas on this
'diagnostic circuit check' and how to proceed.

Thanks

May 6, 2005 | 12:32 AM

jfb

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From: Cincinnati, Oh USA

Why in the world don't you tell us what year?

May 6, 2005 | 02:30 AM

C4newbie

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Sorry...1987 is the year

May 6, 2005 | 08:28 AM

AGENT 86

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From: Summerland B.C. Canada

Is this what your looking for..... http://members.shaw.ca/corvette86/Sc...it%20Check.pdf
Let me know, i have all the charts on my hard drive.

May 6, 2005 | 10:25 PM

C4newbie

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Possibly Getting warmer

Do you have the A-1, A-2 and A-3 Charts?

Many thanks.

May 7, 2005 | 08:56 AM

AGENT 86

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From: Summerland B.C. Canada

Quote:

Originally Posted by C4newbie

Do you have the A-1, A-2 and A-3 Charts?

Many thanks.

http://members.shaw.ca/agent86/Charts%20A1-A3.pdf

May 8, 2005 | 01:27 AM

C4newbie

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Thanks again, will give those a try.

May 8, 2005 | 09:27 AM

AGENT 86

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From: Summerland B.C. Canada

Anytime

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May 15, 2005 | 04:42 PM

C4newbie

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btw

Ur car pics are smoking...what kind of paint did you use for the yellow on the engine?

May 15, 2005 | 06:56 PM

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AGENT 86

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From: Summerland B.C. Canada

Quote:

Originally Posted by C4newbie

Ur car pics are smoking...what kind of paint did you use for the yellow on the engine?

Thanks
I used PPG Concept Paint

May 16, 2005 | 01:49 PM

#11

PierEagle

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From: St Louis MO

Quote:

Originally Posted by C4newbie

Sorry...1987 is the year

Try replacing the MAF power relay and burnoff relay. This may solve your problem. They are only about $10 each. They are located together on the firewall right behind the battery. Had your same problem and this fixed mine. Cheers

p.s. Autozone was giving away a free "jumper key" to check the "check engine" codes on the ALDL. I think they still do.

Last edited by PierEagle; May 16, 2005 at 01:53 PM.

May 16, 2005 | 01:54 PM

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C4newbie

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Thanks again!

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