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

1994 LT1 OBD code 42 ARGH!

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Old Sep 30, 2010 | 12:46 PM
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Y-ME
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Default 1994 LT1 OBD code 42 ARGH!

Ok I put a new Ignition module in my Vette a year ago when she cut off in the garage (best place in the world for a break down). Ever since then she throws a code 42 ignition control module ground. It's on there properly and I have even installed a coil and ig mod from another car, same result, there was the possibility of a bad ecm so I even switched that out with another 94 and the code still came on.

Any idea's? Please? Hello?
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Old Sep 30, 2010 | 01:49 PM
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A poor pin connection comes to my mind at first. Intermittent are hard to find. Does the 42 come up every time the engine is started, or just now and then. I don’t have a concrete answer but I would suggest looking at the FSM for starters. It may point to the problem area and as to what triggers the code.

If you don’t have a FSM I will try to put a pix in for you.
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Old Sep 30, 2010 | 02:26 PM
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Here you go, read thru it and see what conclusions you can make.





Good Luck

I will send you the J-pegs if you want them.

Last edited by pcolt94; Sep 30, 2010 at 02:29 PM.
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