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All, a bit longer than that. I hear ya on the rain! It has been pouring here for two days. No need to pull the boxes, loosen and pull the injector adjuster, flop the lever back and then pull the hold downs and injectors....don't drop the hold down bolts down the push tube cavity!

I think he has used a bunch so far....

No, injection is done by the camshaft lifting a push tube, pushing up on a rocker and the rocker pushing a plunger down into the cup of the injector, no pop off like a bosch system, just the action of the plunger forcing the trapped low pressure fuel through 7 microscopic holes on the end of the...

Ahh, I see it, it is a 2 PSI check valve....no idea why it would be put there. Those are usually installed if the fuel system....tank and plumbing, are higher than the engine....cranes, boats, industrial stuff. From all you have done and the cranking pressure, IMHO, it is toward the injector...

What bypass fitting are you referencing? I could not see what you did in the pic with the circled things.

There should be no measurable fuel pressure when cranking or at idle. The only way to get that is to install an orificed test fitting on the outlet of the pump causing the pump to see a demand for fuel. This bothered me enough to call a guy I worked with that did nothing but pumps for 22 of the...

I should point out that if the return is pinched off/plugged and there isn't an injector issue, and the engine lights, the RPM will start at an idle speed and fairly quickly increase to a very high RPM. This is happening because the return has no place to go and the engine is being force fed...

Injector o rings can't suck air, they CAN get hard and flat, shunting the fuel from supply directly to return. Supply is the bottom, return is the top for the hard lines going to the heads. Get a line and go directly from the pump to a can of clean fuel, clear line is best so you can see if the...