Incommando Posted July 23, 2015 Posted July 23, 2015 The old MJ seemed sluggish. I could find no reason. Changed the fuel filter even though it is only 8 months old and I put in a new tank at the same time. No change and no pressure in the line when I cracked it. Put a gauge on the fuel pressure and found 32 psi. The pressure bleeds off immediately when the engine is turned off and it retains no pressure when the engine is off. Grrrr. It looks like I should have 40-42 psi. I sprung for the better Bosch pump 8 months ago. We will see how the warranty works
cruiser54 Posted July 23, 2015 Posted July 23, 2015 39 at idle with the vacuum hose to fuel pressure regulator disconnected, and it should drop to 31 when reconnected. A leaking injector or 2 or 3 could also cause the bleed down when the engine is turned off.
Incommando Posted July 24, 2015 Author Posted July 24, 2015 Thanks cruiser. I had thought it was the pump allowing the fuel to bleed back as I had had tat happen on another vehicle some years ago.
cruiser54 Posted July 24, 2015 Posted July 24, 2015 Ordered injectors. Which ones and from who? Programbo?
Incommando Posted July 25, 2015 Author Posted July 25, 2015 Cruiser all that I know for sure is they are rebuilt 4 -hole Bosche "upgrade" injectors. They will be here Tuesday as I need them in & running for a trip Friday. In your opinion is it worth changing the pump as well? It appears the pressure #'s are correct and that it was not bleeding off
cruiser54 Posted July 25, 2015 Posted July 25, 2015 Get the numbers off the injectors. See how fuel pressure is after their installation.
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