Thread: fuel pump issues... remote assistance?

Originally Posted by EchiDna

Hi all,
crap situation here given I am in a separate country to the vehicle... my father informs me that my 1988 4BD1 (after market Turbo) has been diagnosed as having a dodgy fuel pump as it occasionally runs on and won't shut down, or alternatively it runs up on starting and hits the governor and stays there until it stops after 30 secs....

he has confirmed that engine oil is NOT being sucked up and the diesel pump blokes claim (sight unseen) that it could be as simple as a broken spring or gummed up valves to something more serious requiring a re-build or replacement.... still trying to get precise part numbers and/or photos, should have these by tomorrow.

any thoughts on potential DIY solutions the mechanically minded old man can try? the good thing is I will be in Melbourne in 2 weeks time so if I can probably buy a new pump here for 50% (or less) of aussie pricing, so I need to make some quickish decisions...

any advice or help appreciated! vehicle is currently in Thomastown for what that's worth!

ha mate not good news, running on can be caused by dribbling injectors but you have two symptoms, with the runing away at start up this could be the governor, as the pump guy suggested a spring and this is more than likely causing the running on as well. I would get the pump looked at and may as well do the injectors as well if they havn't been done.

Thanks Lambrover (and other for their PM's)

Here is the pump info:

Diesel Kiki
Assy No 515601-2743
101401-0291
843M080333
Pump No 101040 8340
NPPES4A85C41CR800VK9755

photos from phone all a illegible, so the above is as good as I have for now... will be hitting google for some info

Originally Posted by EchiDna

Thanks Lambrover (and other for their PM's)

Here is the pump info:

Diesel Kiki
Assy No 515601-2743
101401-0291
843M080333
Pump No 101040 8340
NPPES4A85C41CR800VK9755

photos from phone all a illegible, so the above is as good as I have for now... will be hitting google for some info

101401-0291 is the Bosch identification number - needed by diesel shop to service pump.

NPPES4A85C41CR800VK9755 is broken down as:
NP - Deisel Kiki
PE - inline pump
S - with mounting flange
4 - 4 plungers
A - Bosch 'A' type injection pump
85 - 10 times plunger diameter in mm (i.e. 8.5 mm dia plungers
C - design code
4 - with a lift pump, setting mark on right side of camshaft
1 - governor on left side as viewed from cover plate
'C' - ??, 0 - without automatic timer, 1 - automatic timer on left side, 2 - automatic timer on right side
R - direction of rotation clockwise
VK9755 - design code

Originally Posted by Bush65

101401-0291 is the Bosch identification number - needed by diesel shop to service pump.

NPPES4A85C41CR800VK9755 is broken down as:
NP - Deisel Kiki
PE - inline pump
S - with mounting flange
4 - 4 plungers
A - Bosch 'A' type injection pump
85 - 10 times plunger diameter in mm (i.e. 8.5 mm dia plungers
C - design code
4 - with a lift pump, setting mark on right side of camshaft
1 - governor on left side as viewed from cover plate
'C' - ??, 0 - without automatic timer, 1 - automatic timer on left side, 2 - automatic timer on right side
R - direction of rotation clockwise
VK9755 - design code

I seem to recall you saying that some pumps have 9.5 mm plungers? Any idea which engines they were fitted to?

Originally Posted by isuzurover

I seem to recall you saying that some pumps have 9.5 mm plungers? Any idea which engines they were fitted to?

The pump on my 4BD1-T had 9.5 mm plungers, but they are being changed to 10.5 mm using elements for an Isuzu 4HG1-T pump (Ident. No 101401-7452).

from memory the 8.5's were on the 3.3l

er... so from Dave's post am I to surmise that I have a 3.3 litre pump on my 3.9 litre turbo??


anyway, I think it is off to the deisel pump shop for a look-see, hopefully not going down the path of a rebuild, but if I was - any thoughts on changing the injectors? increasing the fueling rate from stock etc? given it was a factory NA motor and I've no idea how much the PO's have mucked about with it, I've now got the chance to right some wrongs so to speak... whatcha reckon brains trust ??

definately have to get my work books back....

it shouldnt need an overhaul those inline kikis are near on indistructable (like the rest of the engine its bolted to)

get the bump clearances set then get the spill ports set the same and your good to go for standard power.

tweaking the spill ports up a little on the rack can give you a good hit and the 3.9 injectors are an easy job to rebuild but its usually just as cost effective to install new ones. when you do get new ones pay a few bucks to get them crack tested and set the crack pressures to the same.