See, that's the thing.

Since I replaced the really badly leaking original hand primer pump with the new style Bosch hand primer pump and the car still has the same exact, unchanged problem it makes me think that the new primer pump must be defective.

The old primer pump sprayed a solid stream of diesel fuel all over the engine compartment when I used it to bleed the new filters, so I was sure it was what was wrong, it was SO bad.

It seems to me the new primer pump must be defective, too. Changing it out made no difference.

There aren't any fuel leaks on the outside of the new Bosch hand primer pump or anywhere else in the engine compartment or on any of the fuel lines or fittings.

That has to be what it is.It would be a fantastic coincidence if two things went wrong at the same time.

But...

Could an injector be leaking fuel into one cylinder when the car is shut off and letting air into the system?