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Old 07-13-2010, 08:33 PM   #1
misfits
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Join Date: Feb 2001
Location: Sturgeon Bay , WI USA
Posts: 375
1990 chevy code 42 / Running rough

I have a 1990 chevy pickup with a 305 that originally had a v6 in it, manual trans, 2wd. Its reading a code 42 that according to what I read is Electronic Spark Timing (EST) Bypass Circuit fault. I really don't know where to start with this. Is there a simple fix to this? I'm new to these new fangled computerized vehicles. Any help is appreciated.

Last edited by misfits; 07-17-2010 at 03:50 PM.
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