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C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

interesting....bad pcm?

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Old Aug 5, 2006 | 03:18 PM
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sonomacrew01's Avatar
sonomacrew01
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Default interesting....bad pcm?
93 LT1

QDM #2 and #3 showing faults
MAP sensor way out of wack... showing 1280+ volts
Intake air temp sensor showing 32 degrees.

Traced the ground, cleaned it up and did continuituty tests leading back to the PCM and everything looks ok...
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Old Aug 6, 2006 | 03:05 AM
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Originally Posted by sonomacrew01
93 LT1

QDM #2 and #3 showing faults
MAP sensor way out of wack... showing 1280+ volts
Intake air temp sensor showing 32 degrees.

Traced the ground, cleaned it up and did continuituty tests leading back to the PCM and everything looks ok...
Have you cleared the codes and do they come back immediately? Did you perform the diagnostics for the DTC codes that are hard failures? If you did all of that and everything checks out then its probably the ECM.
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Old Aug 6, 2006 | 10:48 AM
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sorry about that.. ECM....

and by the way... no codes...
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