signs of fuel pump malfunction
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2001 Pontiac Aztek Question: fuel pump
Answer #1DaveJHM March 29, 2011, 21:39Master
Have a fuel pressure test performed to determine if your pump is functioning appropriately.
Answer #2patrick mannion from Greg Solow's Engine Room, March 29, 2011, 22:26Master
Low fuel pressure will cause fuel starvation under load on acceleration resulting in a loss of power, (lean running condition)Too much fuel pressure is caused by a restricted fuel return line or such. As Dave said get pressure verified using a fuel pressure gauge to verify pressure and volume is OK.