Re: TBI Fuel Pressure
Well, I got both new pumps installed saturday and the right tank was working great. After install fuel pressure during crankin was 14 psi and 15psi while running. So I pinched off the return line and fuel pressure went upto 25psi. Then i switched to the left tank and imediately noticed a problem. It was hard to start and crankin pressure was only 6 psi. I got it started and running pressure was 14 psi and it started to slowly drop over a few mins of running eventyally the engine died when pressure reached 12 psi. Shortly after that the left pump barely would push 5 psi in any test. So it appears that one was bad out of the box. When I switched back to the right tank evrything went back to 14psi crankin and 15 psi running. I couldnt figure out why though it was only producing 15psi though with the 18psi spring so i pulled the pressure regulator and recompared the postion of the regulator tang to the picture list that came with the spring and turns out with the regulator cover I have i will only reach 15psi. So i am now converting the regulator cover to make it adjustable and will do more testing once back together and the left tank is reinstalled. I did try to apply power to the little connector on the relay pigtail and it was soo corroded internally that i couldnt get full power thru it. Tried cleanin it but still couldnt get it to work right. So i pulled the relay and just jumpered the pins in the connector to get the pump to run.
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