Check the fuel pressure. It may be loosing its prime.
August, 6, 2012 AT 12:04 AM
And then when gas is low in tank it stumbles driving down the road and also looses power at about 4000 rpm just stopps pulling
August, 6, 2012 AT 12:08 AM
Ok, did you check the pressure
August, 21, 2012 AT 12:36 AM
My Jimmy GMC 2000 has the same problem, I only get 50PSI when I turn the key, when it is started and running the fuel pressure gets lower if I idle it higher. After I shut off the jimmy my fuel pressure slowly goes down to zero on the gauge. I need some help here. Changed the fuel filter, fuel pressure regulator also.