NEED HELP WITH CODE 42 ON CHEVY

1990 Chevrolet Corsica

Tiny

davidstum

August, 26, 2012 AT 12:43 AM

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.

FOUND 49 RELATED QUESTIONS

Trouble Codes 42 & 92

9 ANSWERS
4 IMAGES

Trouble Code 42

27 ANSWERS

3 Answers

Tiny

KHLow2008

August, 26, 2012 AT 1:22 PM

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

Tiny

davidstum

August, 26, 2012 AT 10:21 PM

It is distributorless, so I guess HEI.

Tiny

KHLow2008

August, 26, 2012 AT 10:32 PM

Have you tried this?

Please login or register to post a reply.

Code Read Retrieval/Clear Honda Civic
Code Read Retrieval/Clear Scion XD
Read Codes Like a Pro
Code Read Retrieval/Clear
Code Read Retrieval/Clear Mercedes Benz
Code Read Retrieval/Clear Mercedes-Benz C230
Code Read Retrieval/Clear - Dodge Stratus