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Discussion Starter #1
Code 42 (1986 Vett)
So far what I know its Electronic Spark Timming (EST).

Anyone else out there has had this problem and what did you do to fix it.

Before the Motor swap I didn't have this code after the new motor is in i getting code 42.

No other codes before motor swap either.
 

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Discussion Starter #3
I checked the plug it was pluged in but I double check everything this comming weekend.

Did you unplug that when setting the timing? Are you sure you plugged it back in?
 

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Discussion Starter #4
Fixed

Fixed the code 42 it was a broken wire behind the distributor not fun to fix but it done.

I also swapped out the O2 sender no more service engine lights.
 

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I also swapped out the O2 sender no more service engine lights.
With what? Hopefully a good quality heated one not some cheapo at the parts house. I chased a lean problem for a while.
 

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Discussion Starter #7
I installed a Bosh O2 sender.

Now I chasing it dont what to idel and a oil leak it looks like the rear main seal leaking it a 2 piece I going to try to drop the Oil pan with the engine still in the car I hope it works.
 
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