Plastikk

So, I have been troubleshooting this issue all day. I am leaning towards a new fuel pump but am so confused.

Symptoms: Car will start and run like normal for about 1 hour after that period of time when stopping the car it starts to bog down. The wideband goes to 18 at this point in time as well. If I put the car in reverse I have to 2 foot it to keep it running. After it start bogging down, if I turn off the car and restart it, it will not idle without a foot on the gas. I have a fuel pressure gauge at the rails that is reading 8 to 9 psi. I thought maybe that gauge was going bad so I went an bought a few adapters and installed a schrader valve after the (brand new this weekend) fuel filter. I get no fuel pressure readings at all there. I have also directly connected to the fuel pump and I also don't get any fuel pressure readings.

After market 340lph fuel pump in the tank.




Any thoughts would be appreciated.

LS1MCSS

iTrader: (18)

Bad pump. Did you get it off of ebay? If so, it's probably a cheap chinese pump.

Plastikk

Unfortunately no. It's a granetelli (sp?). I have ordered an eBay one to test though. I get the same symptoms with it. I have also added an aeromotive fpr and removed the stock thinking that was the issue. Only thing I haven't checked is for leaky injectors but I figured I would get other symptoms.

Plastikk

May have figured it out. I will do more test driving but I think I've had air in the fuel line. I bled it out tonight at the highest and farthest point on the rails. I drove for 20 minutes without any issues.