View Full Version : maybe a fuel pump?????????

04-21-2007, 09:20 PM
Fuel psi is set at 42 at idle with vacuum line off. The pump gets real noisy the longer the car runs. When looking at the wide band o2 1/4 throttle around 10 psi of boost while driving the a/f goes to 16.1 which is lean and fuel pressure drops fast from 55 psi to 30 and boost drops. Affraid to put the gas to the floor because may cause another problem. Unsure if this a pump any other ideas to check before assuming its a fuel pump?

04-22-2007, 09:47 AM
What pump is in it and how old is it? Do you have a 'hot wire' kit?

04-22-2007, 10:28 AM
Sounds like the pump ... definitely not enough fuel delivery.