RE: dueling fuel pumps
 

neither. we bought a whole new manual oil pressure gauge for the truck.

RE: dueling fuel pumps
 

If the eletric pump is not in the tank, then I recommend removing it all together. The lines have to hook to the pump somehow, therefore, you can install a piece of fuel hose in place of the pump. This would prevent extra added stress on the mechanical pump. If the pump is in the tank, then purchase a sending unit for a previous model year or on of the same year with a mechanical pump. That too would reduce the amount of stress on the mechanical pump. And aince you stated you don't have a fuel leak when the pump is not running or the truck is not running, then that would fix your leak.

Just a note, if it is a factory installed electric pump, that would suggest you had a throttle body injection system. This being said, the factory fuel pump outpit is roughly 16psi. The operating pressure would then be around 13 to 14psi. I used the factory electric fuel pump in my montecarly when I put a 330hp 355cid small block in it. I had a Holley 750 double pumper w/ manual secondaries. I used a Holley adjustable fuel pressure regulator that I purchased at Summit Racing Equipment. I set my operating pressure at the carb inlet between 7 and 8psi. I did not have a return line and the fuel filter that was on the car when I bought it in 98 was the same on that was on it in 06 when I sold it. The only problem I ever had with the fuel delivery system was when the ground wire terminal risted off teh tank and everything quit running.

Good luck. I'm curious to see what you come up with.

RE: dueling fuel pumps
 

Hello Blazer Forum Members,I have a new problem on my 1999 Chev.Blazer LT 4.3L.I went to the car wash and washed the engine off with degreaser,It never would re-start after that.I had to call a flat bed wrecker to take me home.It ran really good going to the car wash.The only thing before that I did was put a new in-line fuel filter in and change the engine oil.I checked the fuel rail for gas and it had 60 psi.It has fire coming out of the coil to the dist. cap.It acts like it is no gas at the injectors.I wonder if it hasgone into stop mode on the control module.Any one ever seen anything like this?Thanks for your help.Hotrod28.

RE: dueling fuel pumps
 

hotrod, please create a new thread on this subject.. I see nothing similar to your problem in this thread...