Thread: Confirming my Diagnosis

very interesting.
but fuel is still folwing out of the IP's return outlet and the flow does not reverse at any point.

lambrover, what exactly does not make sense?

Ok I managed to steal a couple of hours.

Originally Posted by Blknight.aus

take the output line off of the lift pump put it into a can it should pump about 5ml per turn of the cam...

put your finger over the end of it and crank the engine you should feel about 4-7psi of pressure

Yep that seems about right
About 5ml per crank
and some pressure behind it, feels about right

next thing I'd check would be the injectors for blow back.

get the engine running @~1Krpm and crack the injector lines one at a time at the injector if one makes a comparitively different tune in the misfire then you have a suspect injector.

do it again at idle and see what the fuel is like when it comes out the injector nozzle, you want to see if you can get it to drip out, if it drips out milky white from all injectors then its something in the IP if its only doing it from one or 2 injectors then its blowby. Time for new injectors.

If its coming from the IP...
disconnect and blank the boost compensator line, clean the compensator vent. If diesel comes out of those holes after a while then you have had a failed compensator diaphragm and ist just a case of replacing that and the pin seal for the compenating actuator pin.

Originally Posted by Blknight.aus

next thing I'd check would be the injectors for blow back.

get the engine running @~1Krpm and crack the injector lines one at a time at the injector if one makes a comparitively different tune in the misfire then you have a suspect injector.

all extremely close to being the same

do it again at idle and see what the fuel is like when it comes out the injector nozzle, you want to see if you can get it to drip out, if it drips out milky white from all injectors then its something in the IP if its only doing it from one or 2 injectors then its blowby. Time for new injectors.

Milky at all 4

If its coming from the IP...
disconnect and blank the boost compensator line, clean the compensator vent. If diesel comes out of those holes after a while then you have had a failed compensator diaphragm and ist just a case of replacing that and the pin seal for the compenating actuator pin.

ill try this another day out, of time for now

Thanks a lot
Getting closer to the issue

Originally Posted by Blknight.aus

next thing I'd check would be the injectors for blow back.

get the engine running @~1Krpm and crack the injector lines one at a time at the injector if one makes a comparitively different tune in the misfire then you have a suspect injector.

do it again at idle and see what the fuel is like when it comes out the injector nozzle, you want to see if you can get it to drip out, if it drips out milky white from all injectors then its something in the IP if its only doing it from one or 2 injectors then its blowby. Time for new injectors.

If its coming from the IP...
disconnect and blank the boost compensator line, clean the compensator vent. If diesel comes out of those holes after a while then you have had a failed compensator diaphragm and ist just a case of replacing that and the pin seal for the compenating actuator pin.
Definitely fuel in the comphensator housing when i do as above

so how big of a job is it to fix that? and is it plausible to fix withot removing the pump?

yes it is...

Theres a thread on here about doing it complete with pics of which seal is the most likely suspect along with some fairly understated comments about how clean the engine bay needs to be before you start work.

Cheers.
ill go see if i can find the relevant thread

Originally Posted by SSmith

Cheers.
ill go see if i can find the relevant thread

Here, try these.

Bosch VE pump seals.

How to replace the throttle spindle seal on a Tdi Injection pump - LR4x4 - The Land Rover Forum

Must join to see the photo's it seems.
.