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Originally Posted by carriencolby
1998 4 wheel blazer runs fine except when on hills, no check engine light or anything comes on. i have replaced the fuel filter, fuel pump, and tps. Anyone have any ideas before i spend more money chasing down this problem? thanks
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How is the basic tune up end?
Good AC - Delco plugs?
Any cold air intake stuff or cone filters?
Have you tested the fuel pressure?
What is the engine vacuum reading at idle and at 2K rpm?
Do you ever see the checking light flash?
Can you feel a miss fire on a hill?
Why was fuel pump and tps replaced?
Ac Delco fuel pump?