Why does my vehicle run bad while driving and better when in full open throttle?

Asked by Jan 04, 2015 at 05:52 PM about the 1995 Chevrolet Blazer 4 Door LT

Question type: Car Customization

I have a Chevy s10 Blazer and replaced all the fuel lines, sending unit, fuel pump, spider,
coil, rotor, cap, spark plugs, wires, ignition switch, mas censor, EGR censor, timed it
correctly, new exhaust system, all the way up, replaced both o2 censors, new battery with
good connection, new alternator.

2 Answers

106,055

Just a thought. Plugs wires on correctly?

17,345

Vacuum leaks.

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