i have a 1985 Chevy camaro iroc z that has a 5.7 tpi swapped in from a 85 corvette. after running for about an hour the car sputters and runs like **** and stalls out. if i get out and put my fuel pressure tester on the bleed valve im getting 24psi !?!? i have a new fuel filter, and high flow fuel pump from summit. i ran out of gas one time. could that have cooked my fuel pump for good??

 

No fuel could have damaged the pump, the fuel is used to cool the pump. I would check the fuel pressure regulator before I jumped back in to the fuel pump. Also, its possible that when the tank ran dry, you sucked up some debris and damaged the pump or clogged the filter. The regulator is easier to check, so that is where I would start.

 

Also bleed off the residual pressure and recheck it. If it is still at 24 psi, clamp off the hose for the return line and recheck pressure again (re-prime it). If it goes up (usually by a lot), the pressure regulator is definately bad. Check that and report back.

 

Never clamp it off completely.
The proper way to test is to give a continuous 12 volts to the pump.
Watch your fuel pressure.
Slowly pinch your return line.
Watch the pressure go up.
Do NOT bring the pressure over 65psi. The stock regulator is only rated for 65. Anything above that and you could destroy it.
This test only tests the output of the fuel pump. There is no actual test for a regulator besides seeing if there's fuel in the vacuum line. Only tests that eliminate everything else.

 

Just a thought did you happen to prime the new fuel pump before installing it?If not i have seen them go bad from installing dry with no gas in the pump, it could be bad.

 

do you prime a pump by just turning the key forward a couple times with a guage hooked up? my 91z would only get about 20psi so im in the process of changing the pump. hope it does the trick!

 

You apply 12v to the fuel pump test port. It should be the female end of a spade connector located under your hood. It'll be close to the firewall on either the drivers or passengers side.