105

iTrader: (7)

I had a racetronix pump installed a couple years ago and ever since I have to turn the ignition to on 3 or 4 times before attempting to turn the engine over or the car won’t start.

I checked the fuel pressure with a tester from autozone. First with the ingnition in on position it jumps up to 62 psi then immediately slowly drops down to zero within about 5 seconds. Next I started the car and let it run for a few minutes and pressure stayed at 62 psi. Then I turned off the car and pressure dropped to zero within about 5 seconds just like first check.

I dropped the tank, pulled the pump and huffed the fumes, now what do I look for?

View 1


View 2


View 3


View 4


View 5


View 6

joblo1978

iTrader: (14)

62 is where mine runs, but it never drops. Are you using the hotwire and upgraded ground?

105

iTrader: (7)

I'm not sure as I didn't install it initially. How can I check this? The guy that installed it did mention something to me about wiring it to the ignition or something as a possible fix. Is that what you're thinking?

67RSCamaroVette

iTrader: (63)

The guy that installed is incorrect. It is not an electrical issue. It is a mechanical (installation) issue. He wants to run it so instead of prime (using PCM to control fuel pump), he wires the relay trigger to a constant 12v IGN source (making the fuel pump run constantly when keyed on..) while that would work, it's a band-aid fix. Either the check valve in the pump is bad, or there is an internal leak between the pump outlet and the top of the pump.

105

iTrader: (7)

Is the check valve the brown and black part with 2 silver clips shown in "view 6" above? Maybe I should replace the check valve and the big hose running from the pump to the top of the assembly. Or, maybe just remove, inspect and reclamp the hose?

Ollie8974

Yes that is what you are calling a "Check valve". It's actually the fuel pressure regulator.

01CaMMMaro

iTrader: (25)

I know on the Walbro pump you are suppose to cut a couple holes out of the assembly. Im assuming you are suppose to do this with the Racetronix also... check out this site, it is for Walbro though, im not 100% sure Racetronix pumps and Walbro pumps are the same install process though.

http://www.gonicd.com/intankinstall/...mpinstall.html

Notice the cuts he makes... ive heard if you dont make the cuts in a Walbro then it will run like ****, maybe its the same for Racetronix? im sure someone will chime in on this.

01CaMMMaro

iTrader: (25)

scratch that... just read up a little as im looking at puting a racetronix in my car as well... you do NOT have to cut anything on the assembly with racetronix because it has the venturi nipple.

105

iTrader: (7)

Could the fuel pressure regulator possibly cause the problem I'm having? Where is the check valve then?

105

iTrader: (7)

I'll be trying some tests recommended by Racetronix this weekend hopefully. I'll let yall know what I figure out.

105

iTrader: (7)

I found the problem. I rigged up a fuel pressure guage to the sending port on the fuel module, plugged it back into the stock wiring and submerged it in 4-5" of fuel in a clean drain pan. The idea was to check for a problem inside the pump or a possible leaky hose in the module assembly. I watched the pump while my friend turned the key to on position and fuel jet streamed out of the orange sending hose. So I need a new hose.

The leak spot is circled in red.


Rigged up guage assembly.

MeentSS02

iTrader: (11)

Good job trouble shooting that one...at least you took the time to figure out what it was, and you should be able to fix that without a problem.

105

iTrader: (7)

Thanks, yeah I'm glad it turned out to be something simple and obvious.