Just caught up with the goings on. Sorry but the driving and the new job are keeping me away...
I can confirm the things below as I have done it:
FIP
To remove the FIP you need to lock the engine at TDC using the FLYWHEEL locking pin - not in the pump. If you don't put the pin in all the way, when you undo the FIP nut you turn the engine backwards. That's why I'm having to change my timing chains as it's as easy to change them as check them.
You also need the special tool to hold the timing chain in place while you remove the FIP or the timing chain moves inside the housing and then your timing is out. I believe that is what the first "mechanic" that swapped my first FIP did (or technically DIDN'T do). Smokey as hell and massive reduction in power.
FIP SEALS
If they changed the TOP seal only on your FIP - it doesn't need any special tools apart from removing the security bolt. It also DOES NOT affect anything else at all.
The one that you have to be careful about is the second one down, that DOES need to be done carefully and in a certain way.
The FIP being "on cam" is (as far as I know) ONLY for changing the HP o-ring that the 6 pipes go into as a bit can fall out and get stuck internally if it's done wrong.
VP37 EDC
The FIP is an EDC version of the Bosch VP37 - that's the special electronics bit in the top as far as I'm aware. Electronic diesel control I believe.
In tank pump (aka lift pump)
The in tank lift pump gives no faults when it fails. You will have trouble starting the car with 1/4 tank or less of diesel and especially if it's pointing up hill at 1/4 of a tank or less. Mine did.
You can check if the intank pump is working or not by removing the fuel pipe from the fuel filter and measuring how much squirts out into a measuring jug. If nothing comes out when the ignition is turned and the engine cranks - it's f*cked 👍 There is a specific amount it squirts out so you can measure if it's working 100% or reduced rate. It only squirts once on start up, after that the FIP suction takes over.
These cost around £25 and if the hole has been cut in your floor should take 30 mins maximum to change. Honestly.
You are best to install a non return valve between the fuel filter and bulk head in the fuel line. You will NEVER know that your intank pump has failed again once you do this 😄
Good luck Mazz1, if I was nearer I would have helped but I'm working in Cornwall & Devon and travelling Sunday's & Friday's.
If you intend to keep the P38 definately buy a Nanocom or similar. You won't regret it.
All the best and keep us posted,
Hoppy
cheers,
Hoppy
2000 P38 DSE, Silver Gold, HP24
This one's called Dave, after Dave3d :-)