Search the Community
Showing results for tags 'fuel pressure'.
Found 2 results
-
Hi! So about 2 months ago my fuel pump went out. Had it replaced and right away we noticed sometimes it would crank but No start. After a few days the pump was defective, so replaced it again. Pump ran great with good pressure but after about a week or so, same issue crank but no start. Sprayed some starter in the manifold sometimes start, sometimes no. Turn key on/off to cycle and then sometimes start, sometimes no. Used the pressure valve behind the spider to bleed air/fuel then engine start fine. Would run fine for a couple days up to a week and then same thing all over again. Took it to local chevy. Diagnosed fuel pump, ... good to go they said, everything working properly. 2 days later No start and this time cannot get it to turn over, pressure is at zero. Pump is still turning on but not humming like it was. Replaced MAF and distributor cap as well as fuel filter. My local mechanic and I are stumped, and I'm already $1000 in on repairs. Please help! -
I have a 2010 Silverado 5.3 LT 4x4 and my engine stalls when accelerating or revving, it doesn't get past 2000RPMs and starts making a deep almost rumble noise. I unplugged my MAF it almost kills my engine so I didn't believe it was that. I just replaced my TPS. After somebody recommending I test my fuel pressure, I did so and the results were as follows: Fuel pressure at 60psi with power on (not started), about 57 idling, and once you press in the accelerator, almost immediately shakes between 40-43 and doesn't move from there until the engine stalls out. Is this my fuel pump or something else entirely? Thanks for the assistance.