ANSWERS: 2
  • Check the #1 Spark plug. That engine is a V8 that was cut back to be a V6. I've had two of them in my '89 Blazer and the #1 plug always fouls. .
  • AS far as V6s go, most powerful you'll ever get, it is a 350 minus two cylinders. Check the plugs like suggested in another answer, check the intake for excess restriction. Pull the codes and make sure your new TPS is in spec (they have to be adjusted with an ohm meter to be in the proper range.)

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