NEED HELP WITH CODE 42 ON CHEVY CORSICA

  • Tiny
  • davidstum
  • 1990 Chevrolet Corsica
  • 29,000 miles

I have 1990 corsica 3.1L with 29k miles and it is throwing a hard code 42. It runs rough and idles too high when slowing down. When it comes to a complete stop, it finally kicks the idle down and almost dies.

I have replaced the following so far.

-IAC valve
-TPS sensor
-ICM
-Crank Sensor

I have checked these wires for continuity at both ends.

-#453
-#573
-#574
-#430
-#424
-#423
-#450 to ground

The SES still comes on after a few seconds of idling. I am wondering if the plugs, wires or coils would make it throw this code? I did check the coils at the secondary pins and I had something like 5.8#, 5.8# and 5.9# ohms.

I'm not sure what else to do and getting tired of spending money on non-fixes.

Sunday, August 26th, 2012 AT 12:43 AM

3 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Which ignition system do you have, With distributor or HEI?

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 1:22 PM
  • Tiny
  • davidstum
  • Member

It is distributorless, so I guess HEI.

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 10:21 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Have you tried this?

Was this
answer
helpful?
Yes
No
Sunday, August 26th, 2012 AT 10:32 PM

Please login or register to post a reply.

Similar Questions