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-   Full Size K5 (1969-1991) GMT415 (1992-1994) Tech (https://blazerforum.com/forum/full-size-k5-1969-1991-gmt415-1992-1994-tech-42/)
-   -   I need fuel pressure testing help :-) (https://blazerforum.com/forum/full-size-k5-1969-1991-gmt415-1992-1994-tech-42/i-need-fuel-pressure-testing-help-80865/)

GMGIRL 08-09-2013 10:50 AM

Thanks Rex

70-K5 08-09-2013 11:37 AM


Originally Posted by GMGIRL (Post 596298)
Fuel in tank about three gallons.
I don't hear the pump at all when I turn the key on.
Pretty sure it has spark cause if I put gas in the intake it Trys to start

3 gallons is enough to be within my margin of error when it comes to calculating my fuel consumption.

If you don't hear the pump do that 3 second whirrr when you hit the key then that is something to be concerned about. The pump is either not getting power or it is done. Start by getting your pump to prime. Sounds as if you're not having a problem with low pressure, it might be NO pressure :)

GMGIRL 08-10-2013 07:36 PM

How do I get my pump to prime. And it sounds like your saying I should put more gas in it. If I put to much will it gravity feed into the injectors?

chris015 08-10-2013 08:14 PM

Honestly it sounds like your pump is fried. Get on rock auto,and get a pump. a actual ac delco (factory replacement) is only like 40.00 on it. A cheap aftermarket is more then that local.

GMGIRL 08-11-2013 11:27 AM

I'm confused on what pump to get. It didn't let me search by vehicle.

70-K5 08-12-2013 03:32 PM

Sorry I can't walk you through it like a factory tech. I've only had one TBI vehicle and I haven't had to mess with the fuel pump. There is a relay that provides power to the pump, I believe this is controlled by the ECM.

You should check for voltage at the pump and at the relay using a basic muliti meter. They can be purchased at any hardware store and the cheap one for like $15 would be fine for what you're doing.

chris015 08-12-2013 03:37 PM

Ok,on the pump,its part number

DELPHI Part # FE0115 ($33.79) or

ACDELCO Part # EP386 ($39.79)

Prices based on rockauto. Id advice you to get the ac delco. Delphi is just as good,but for whatever reason i stick to ac delco. Its just a opinion lol.

GMGIRL 08-13-2013 10:56 AM

Woohoo. Ok She is up and running! Once I found out the relay and ecm fuse were different Ipulled ecm B and it was melted! Replaced it and she was good to go. Still not sure what blew the fuse. It is staying intact now. Thank you guys. Can wait to get dirty!!!


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