injection pump not pumping

[idijack]

I took a good running 7.3 out of 90 f450 and put it in a 89 f350. The pump is getting fuel and is filling up but wont pump to the injectors. Will the pump pump with the top off ? I think the solenoid is working it did in the other truck. What is wrong?

 

[OLDBULL8]

Don't take the solenoid cover off just yet, check the fuel solenoid by removing the front wire with the key on engine off. You should hear a click by pulling the wire off and back on several times. Check for 12 VDC on that wire before doing that, or run a jumper from battery to the solenoid and do that. Clicking tells you the solenoid is good.

 

[idijack]

already did that have had the cover off and changed it out with another one .

 

[riotwarrior]

Pretty vague info your providing...how about details and lots of them about what's going on whats been done was it a known working unit previously how you swapped it etc.

Not enough info to provide a good diagnosis!

Al

 

[idijack]

it ran great in the other truck now the injection pump wont pump anything to the injectors I ve changed the seliniod cover and no change. the pickup pump is working fine .