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IT18B FUEL ISSUE!

Jasoncarlon

Member
Joined
May 8, 2020
Messages
12
Location
Australia
I have a customers IT18B, serial prefix “1DF” with a 3204DI.

it dropped a valve, put a new reman head on it, and new piston/rings. Can not get it to fire witho it ether or pumping the primer while cranking. Fuel system was a bit sad so decided to overhaul it. Had the injection pump rebuilt, and put new injectors in it & filters. Still the same, if I crank it while someone pumps the hand primer it will idle, as soon as you stop pumping the hand primer, or try to rev it up, it dies. Plenty of pressure from transfer pump etc (which was done with the rebuilt pump). Only thing that hasn’t been done is the adapters through the valve cover, read somewhere they have a screen in them? Seems strange it will fire if pumping the primer though.
Any help appreciated! Thanks.
 

stourpaine

Well-Known Member
Joined
Sep 3, 2023
Messages
70
Location
Canada
Occupation
Retired mechanic
when you hit the start position on the key I believe the relay should latch and keep the electric fuel pump running maybe thats not happening?.as its direct injection and you changed pistons did you possibly get the pistons in the right orientation so the injector can inject into the cup in the piston just a thought
 

Dave Neubert

Senior Member
Joined
Jul 18, 2018
Messages
1,649
Location
Monroe NC
I got 3 supply pumps from CAT every one was bad I finally took one apart and the check valves were bad put new ones in and i fired up. Do you have fuel pressure wile cranking
 
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