No, I changed both the fuel pump, filter, and injector about three months ago.

Just checked pressure at the pump, only 50 psi, and drops down rapidly as soon as the pump is turned off. I'm kinda suspicious of my pressure tester, though. Seems way too low for the truck to even run. Might have to rent one for a second opinion.

I just don't get what would make a brand new ac Delco fuel pump die in less than four months

Edit: checked the receipt. New pump was purchased 1-18-18. Not even 2.5 months. I don't get it

 

Captain Hook to the rescue once again. See post #8 https://blazerforum.com/forum/2nd-ge...ks-help-79052/

 

Probably needs a new nut kit. It's like six years old, and has had a few spiders changed. But that still doesn't explain the low pressure at the fuel filter. Pump doesn't hold pressure, either

 

Are you bleeding the air out of the gauge line real well? Also, I have found more than one of those gauge manifolds to be bad.

 

Hmm. Never thought about air in the guage line. Never done it before, to be honest. Mine doesn't have the second line to bleed air.

 

Air in the line can make HUGE difference on readings and give you false results. Again...loaner But they make you put down like $150 for that (though you get it all back when you return the tool.

 

Yeah, I'm gonna get a loaner. I've rented them several times before. That's why I eventually bought one, but it was a harbor freight special, and I don't trust it.

I should have checked this stuff first, but having replaced it all a few months ago, combined with how it was acting, I jumped right to evap

 

Well, we know you definitely had/have couple EVAP issues also you fixed/to be fixed, so it definitely wasn't wasted time. And you know how the system pretty much works now. Don't know why I thought you had already done pressures. It's usually the first thing I recommend with these issues. It's even in my signature block!

 

So, rented a pressure guage, cause I didn't trust my harbor freight one.

At the pump, like 52psi. And held zero pressure.

New pump, and all is good. 100+ psi at the pump, and holds pressure.

Thanks for all the help, man. Still need to replace the vapor canister, probably later this month I'll tackle that.

 

Glad you got it fixed and also thanks for the final report.

But dang. Apparently another "new-pump fail" story. What brand was the first replacement and what did you use for the second?