Well, I finally installed my fuel pressure gauge.
At idle, I am getting 58-60 psi. Driving around & partially agressive driving, the same.
WOT above 5,000 to 6,400 it drops to 52psi.
I have the walbro 255 intank. Are my readings normal?
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Well, I finally installed my fuel pressure gauge.
At idle, I am getting 58-60 psi. Driving around & partially agressive driving, the same.
WOT above 5,000 to 6,400 it drops to 52psi.
I have the walbro 255 intank. Are my readings normal?
If I remember correctly the fuel pressure on the Chiltons book said 52-62 PSI. Sounds like its running out of fuel if its losing pressure, though. You have a one line fuel rail, returnless, correct?
Correct.Quote:
Originally Posted by RedHeartbeat
One thing to check is the charge voltage at those RPMs. As the voltage drops your gauge will read lower and the fuel pump will be less efficient.
Are you talking about adding a voltage booster, like a Magnavolt or something?Quote:
Originally Posted by RedHeartbeat
I have one if you want to try it. I think it is just a bandaid. How much fuel in the tank. I think he might mean check the voltage at the connector by the tank and see what voltage it is at WOT. I have the same fuel pump as you and get no pressure drop at WOT.Quote:
Originally Posted by SCIV
Tank is 1/2 full.Quote:
Originally Posted by GMCwantsLS1
You mean a voltage booster is a patch solution? How in the heck do I check the fuel pump voltage at WOT? You mean run wires back there & into the cab?
Yes you have to run wires into the cab. Or you can hang your son under there, oops bad idea. :doofus:Quote:
Originally Posted by SCIV
But I am still within the spec'd range, so that shouldn't be a big deal. Right?
Makes me think that at 10psi + I ran out of fuel. Then my engine ran outta pistons.
It could just need the ground tightened or the plug cleaned at the tank. It might be fine and just richen the tune to compensate.