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Re: 1996 2.2L Noise from fuel tank
It probably is a bad pump, but check the pressure to be sure.
The change in pitch is most likely just a change in pump RPM due to changing electrical loads and charging voltage.
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'04 Cavalier coupe M/T 2.2 Ecotec
Supercharged 14 PSI boost, charge air cooler, 42# injectors
Tuned with HP Tuners
Poly engine/trans/control arm bushings
Self built and self programmed progressive methanol injection system
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