Engine Performance problem
2000 Chevy Malibu 6 cyl Two Wheel Drive Automatic 136000 miles
I have a 2000 Chevy malibu ls 3.1l v6 This car is currently on its 3rd fuel pump. The factory one that was in it, then one replaced by my mechanic, then one replaced by myself. All pumps that were used were ac delco brand. The moment that I changed the last fuel pump myself I was only getting around 150 miles out of a full tank of gas/ that pump was 30lbs key on fuel pressure. As soon as I put the new one in wam was getting 50lbs key on fuel pressure and 300 miles out of tank of gas. Now after about 1 year my fuel milage has dropped back to 200 miles out of tank of gas. Tested fuel pressure today key on about 45lbs one of my questions is when my buddy turned the key to the on postistion the pressure jumped up to 50lbs then held steady at 45lbs. Now chiltons manual says operating range from 41 to 47lbs key on. I had someone tell me from 52 to 55lbs I have seen some blogs say that a terminal on the connector a female one loses springing activity and could be shorting out pumps? What is making these pumps go so fast? I change fuel filter regularly What is going on?
have the same problem?
Friday, January 16th, 2009 AT 8:08 PM