Mark, you are SO RIGHT and yet we have 9 f'n pages of putting on a pump. Lol
The pump has ALREADY been tested by a fuel shop so we know that's right..
HERE'S ONE I ran into yesterday.. MIND YOU, I still have a f'ed up back.. I get a call from a mechanic friend who's REALLY, REALLY GOOD.. he just doesn't know fuel injection very well.. HE got a call from ANOTHER MECHANIC for some help.
Seeing both these guys are mechanics and 1 is a VERY GOOD friend, I strapped on my back brace and grabbed my pill bottles and hit the road for assistance..
The OTHER MECHANIC was commissioned to install a salvage yard motor in a loader and couldn't get it started.. the inj. pump has a lock timing device on the driveshaft he didn't know anything about and yanked off the pump thinking that was the problem.. The OTHER GUY goes back to the salvage yard and gets ANOTHER MOTOR, Yanks off the pump, doesn't time either one and still cant get it to run.. hence the phone call..
I time the pump that came off the 2nd motor using a dial indicator and some special tools I own and head over to put the pump on, with help of course.. Time the engine that was 180* out of time.. with the engine barring tool I own. [Cummins]
The pump is on, lines hooked up, air bled out and fuel coming out the inj. lines... NO FIRE.. WTH?? There was enough fuel squirting out those lines to fill a 5 gal bucket.!!!
Shut off the electric fuel pump, to smoke and talk about the problem and let the batteries charge.. We say, lets try it again.. nothing but air came out the inj. lines.!! WTH ??? THEN FUEL.. WTH?? We did this about 5x with the SAME RESULTS.. How could air be getting in the system with an electric fuel pump at 10 psi??
We pulled the 4 injectors with the special tool I own and took them to my friends house who has a pop tester.. sure enough, 2 of the 4 where stuck open and pushing the engine compression back into the pump, overcoming injection pressure..
I disassembled the 2 stuck injectors, fixed the stuck ones, re popped tested and went back to the machine.. Reinstalled, turned on the electric fuel pump and WITHIN 1 rotation of the engine it started and purred like a kitten..
The OTHER GUY had been fighting this thing for 3 months.. and like I said, even went and got ANOTHER ENGINE to pull the inj. pump off of it!!!
Just goes to show ya.. its NOT ALWAYS the injection pump..
it took 3 mechanics but only 1 that knew what he was doing.. Lol
OH, AND THE BEST PART IS> He bitched over the amount of money I wanted to fix a machine, with a broken back and eating pain killers, HE'D been working on for 3 MONTHS.!!! I ended up cutting my labor in half [ I WAS sitting down a lot] and telling him to NEVER CALL ME AGAIN.. and buy your OWN F'N special tools.!!!!