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1991 Chevrolet 3500 Pickup Question: Won't run



chronman, 5.7L V8, Onalaska, WA, February 22, 2010, 15:28

Vehicle won't run. I have several error codes and am not sure what way to go. Codes are- 33,32,31,46,43,36

2 Answers
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  • Answer #1

    dandd February 25, 2010, 19:14

    Really need to start with the basics. Check for spark and check for fuel. The computer can/will set codes if the truck is cranking for a long time. Try spraying some carb cleaner in your throttle body, this is a quick check for fuel and spark. If it fires and then dies, you have spark but no fuel, if nothing happens, you have no spark.

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  • Answer #2

    Visitor, February 26, 2010, 09:23

    I've tried all that. It has fuel. Strange thing is it seems to have spark too... The main code I am getting is 43 wich is the electronic spark control. I tried a dif. ignition module. Has new coil & cap. I tested the pickup. You got me. I had it run for a little while. Then it started sputtering. I let it die. It won't restart. Same code 43. I leaning towards ecm or short somewhere. I did all the test that I know to check for power. It all seems to be ok. Something to do with the timing .... electronically.

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