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

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Old Sep 28, 2014 | 05:12 PM
  #1  
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From: Bakersfield Ca
Default Check engine light search

42
41
34
33
55

Light finally stayed on

Looks like time to check wires and connections and adjustments
runs good
minor trouble at start up in morning
idle a little high
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Old Sep 29, 2014 | 12:28 AM
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What year is the car? Makes a HUGE difference...

That said, it sounds like your MAF relays are bad. ...or MAF module if you have an '85.
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Old Sep 29, 2014 | 12:43 AM
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Originally Posted by Cliff Harris
What year is the car? Makes a HUGE difference...

That said, it sounds like your MAF relays are bad. ...or MAF module if you have an '85.
87

Air hose was not on recently I will check stuff out tomorrow

Thanks Cliff

Steve
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Old Sep 29, 2014 | 10:11 PM
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Originally Posted by AJ123
87

Air hose was not on recently I will check stuff out tomorrow

Thanks Cliff

Steve
Didn't want to crank appears had a weak battery. Quick charge fires up. Checked MAF sensor cleaned it up. Would idle at 700 and after a few idled at 1400. Before clean MAF.
Checked for air leaks on Super Ram. leaks yes May be hose from Throttle body to valve covers or I may get to use my new Laser cut gaskets. New there was a reason I ordered 2 sets and was thing about buying two more sets. They sure were cheap.
Thank Scott for making the gaskets to the Super Ram
will be ordering more soon.

Steve
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Old Sep 30, 2014 | 01:44 AM
  #5  
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Cliff Harris
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From: Anaheim CA
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Originally Posted by AJ123
May be hose from Throttle body to valve covers
That hose supplies filtered air to the crankcase for the PCV system.

Looking at those code again...

42 is EST connection open. That will appear if you open the connector to set the timing.

33 & 34 are related to the MAF, which is why I suggested new MAF relays.

55 is a strange one. Usually that's caused by bad ground connections. That would be the grounds on the bell housing bolt.
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Old Sep 30, 2014 | 09:19 AM
  #6  
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AJ123
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From: Bakersfield Ca
Default

Originally Posted by Cliff Harris
That hose supplies filtered air to the crankcase for the PCV system.

Looking at those code again...

42 is EST connection open. That will appear if you open the connector to set the timing.

33 & 34 are related to the MAF, which is why I suggested new MAF relays.

55 is a strange one. Usually that's caused by bad ground connections. That would be the grounds on the bell housing bolt.
thanks things to look at when I get off work
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