Full rebuild, head, rebore, new pistons etc, injectors overhauled, crank grind, etc etc. Diesel pump was not done.
It has started to (about 2 months after rebuild) lose power randomly for any period between 1 second and up to 10 seconds where powercomes back on and all is good. It also feels wierd during acceleration sometimes, like its missing a bit etc.
It tends to do it more often when tank is low (anywhere under 1/4), it does it more often after a long trip, ie after scooting along freeway at 100km/h for half an hour, it will do it frequently as i accelerate from lights etc.
It also blows alot more smoke than my old engine did. Old engine only blew smoke at about 2500RPM and even then not uch. This engine seems to blow it under hard acceleration, and winding the fuel setting back doesnt seem to correct this.
What i have done so far,
Changed cartridge fuel filter,
Cleaned primary filter at inlet to lift pump, (was 100% clean)
Cleaned fuel tank & pickup, pickup was 100% clean and no gunk came out of tank,
Changed all flexible fuel lines, new hose clips all round, (some lines were cracked but didnt look like they would be leaking.
Bypassed water seperator/sensor.
I have spoken to the rebuilder who suggested a few things such as tank pickup, and water seperator, and I am about to take it back to the engine rebuilder and tell him to fiux it. I just want to make sure its nothing trivial first.
It seems like a fuel starvation issue, and since im pretty sure ive eliminated the fuel system up to the lift pump, im wondering wether it could be the lift pump itself, or its more likely to be the injection pump, or perhaps simply an injection timing problem???
its really very annoying when you go to take off at the head of the queue at the lights, put your foot down and you go nowehere for 10 seconds. !
