• Tiny
  • danielvini
  • 1988 Chevrolet Van
  • V8
  • 2WD
  • automatic
  • 122,000 miles

I have a 1988 g20 3\4 ton van with the original motor and trany when I bought it it's response time on the throttle was great I changed almost every sensor in it and changed cap&rotor spark plugs and wires and frequent oil and trany fluid changes it don't tap or knock or smoke but I have loss of power and when I drive it for 15 to thirty miles the check engine light comes on but shuts off when I turn it off and on again until I drive that distance again. I'm lost no one around hear has the A-2 diagnostic module and I don't know where else to turn or what to fix so please you are my last hope what would be my delay.

Do you
have the same problem?
Wednesday, April 27th, 2011 AT 10:26 AM

1 Reply

  • Tiny
  • rasmataz
  • Member

Jumper the DLC terminal B to A


Have the computer scanned for code/s-you have a problem within the engine management system that caused the CEL to turn on-This is your starting point of diagnosis,finding out what's going on.

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Wednesday, April 27th, 2011 AT 11:17 AM

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