Racetronix Pump Requires 3 or 4 Primes Before Start - help. (pics)
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Racetronix Pump Requires 3 or 4 Primes Before Start - help. (pics)
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?
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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
Last edited by 105; 07-26-2011 at 07:01 PM.
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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?
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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.
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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.
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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.
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.
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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.
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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.
The leak spot is circled in red.
Rigged up guage assembly.