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Re: 94' Z34 Lumina High Idle
High Idle and gas fumes could possibly be a leaking injector.
Does it stay at high idle, or does it fluctuate up and down, like it wants to stall? And how high is your idle? (900, 1200, 1500 RPM) and is it in park or drive?
High idle could also be a malfunctioning idle air control solenoid, an intake gasket leak, or a vacuum leak.
You mentioned lower gas mileage, when was the last tune-up, and was the oxygen sensor changed? (O2 sensors are "supposed" to be good for 75,000 miles, but if the last replacement was a bosch, they usually don't last that long.
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