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Originally Posted by blkmonday
ok...i know ive posted around here this problem before but now i have some test results. heres a quick rundown of my problem
95 astro(90k) bogs down on acceleration and has a lack of power...no engine codes..i did complete tuneup and replaced ignition coil and module and fuel filter also cleaned the egr valve to no repair.
i just tested the fuel pressure
52-54 psi at idle
54 psi not running with key on
and a max of 60 psi running with it in drive while reving it
im told the key on psi should be at 58-61 psi
does anyone else think its my fuel pump?
i just want a few experienced opinions before i drop the gas tank and change the pump.
also...
i only have a small amount of fuel in the tank...should i just let it run out? this way i wouldnt have to drain the tank? any hints or suggestions about changing the pump?
thanks for all the advice in advance!!
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its a little low at idle and koeo, but the stall test is in specs. any eng. noise? wondering if the knock sensor is backing off the timing?you can check it with scan tool or timing light at stall.does it fall on its face during the stall test?