Installed a new Delphi fuel pump from Napa,(I know most people won’t be this close to the pump)but have you ever heard one make this hissing sound?
New Delphi fuel pump makes weird noise
- Thread starter Moglocker
- Start date
How is the pressure when it's running?
Sounds like the pressure regulator is relieving back into the tank.
Did a search for you and could not find a Bosch 67655 available...
Several months ago there was a source came available for the Bosch 67655 fuel pump; I purchased one for my parts cabinet as a spare since these pumps are like finding a Unicorn....
Sounds like the pressure regulator is relieving back into the tank.
Did a search for you and could not find a Bosch 67655 available...
Several months ago there was a source came available for the Bosch 67655 fuel pump; I purchased one for my parts cabinet as a spare since these pumps are like finding a Unicorn....
Last edited:
Once I put the cover back on you can’t hear it,yours will probably make the same noise,you won’t even hear it by the time you have the floor in between,I love the 55 psi,Jeep runs great now,
It runs like a different vehicle,I have a new Bosch also as a spare,the gen right access plate paid off again,I would suggest buying more mopar lock rings,those things really suck getting started!
Man im excited. Ive been through an engine rebuild, am at 200k on the dash, and think I still might be on the og pump. Can't wait to change mine out.
I had it out in 4 minutes took 2 hours to start the big plastic nut?
Enlisted some help help to start the ring on reassembly. Felt like I should've been able to get it by myself but just couldn't get the threads right. Running 8-10 psi higher than previously, and now able to maintain fuel pressure after shutoff. Jeep starts first turn, first crank every time now with combination of replacing crankshaft sensor with mopar sensor. Also my old fuel pump looks like it has the Chrysler logo on it. Which I believe means its the original fuel pump. That means it lasted longer than my first engine. Jeep runs really nice now. Easily maintains highway speeds with very light pedal pressure, where before it was taking 70-80% pedal pressure to maintain highway speeds. Couldn't be happier.
Similar threads
