Hello,

I replaced my fuel pump after getting the characteristic gas smell and hard starting associated with the chevy fuel pump recall. I noted that the plastic fuel lines were cracked and leaking fuel. At the end of the job I forgot to put gas in the tank and was trying start it (long day of work). Finally realized there was no gas and filled the tank up. I worked well for a few weeks, then it was hard starting and getting worse. Now you can hear the fuel pump come on and then turn off but reading the pressure while doing this shows it does not build pressure until it starts cranking (and it is slow at that). After it gets up to pressure it starts and runs without a problem, but shut it off and the pressure drains out quickly. It will only maintain about 8 psi seconds after you shut the car off. I took a video of the fuel pressure gauge attached to the schrader valve at the fuel rail.



Thanks, any input is helpful
Will

 

I'm guessing you have no line leaks currently

 

No, no visual leaks around, under or onto the car. Jacked it up and looked around under there. Not even a hint a gas smell either.

Will

 

It's possible that the fuel pump could be a dud and just failed. It does happen every now and then. It shouldn't bleed pressure that fast, nor take that long to build it.

 

did you replace just the pump, or did you change the entire basket?

 

I replaced the entire basket. I had no reason to replace the pump as it was the plastic fuel lines that were braking. One had a weeping hole and the other popped right off with the slightest touch.

http://www.carparts.com/details/Chev...E&gclsrc=aw.ds

Will

 

in that case id just check your circuit voltage while the pump is running, closer to the pump the better. if your seeing low voltage that could be causing it, aside from that id say the pump is likely junk.

 

Is there accessible wires close to the pump that I can check? Do you know which colors are which?

Will