All Things Mk5 > Mk5 General Area

Fuel pressure problems

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Uncleben:
Yeah, I'll see if i can get hold of a pressure tester just to confirm the readings.
I've been reading through a lot of vw literature about the fsi fuel system and it states that if the fuel pump control module is replaced it needs to be adapted using vag com, so although I tried a different control module and it made no difference, could it be that it needed to be adapted? or is that referring to if a brand new one is fitted, I tried a used one off a similar car?
VW do state though that if the control module fails then the engine will not run so maybe I'm down another dead end.

FJB:
When my fuel control module failed (the one under the back seat) the car would not run. I purchased a later revision module on eBay from a Scirocco, I don't remember the part number, but the 1st 3 digits were different, number the same with a different letter at the end. Worked fine straight away when installed, no coding required.

pudding:
That certainly is a possibility but not something I've meddled with personally.  As with many of these things that need 'adapting', simply removing the battery for an hour or longer (to drain away capacitive charge) forces the modules/parts to re-adapt themselves.  So you could try that?

EDIT: Just seen FJB's reply, so there's another answer  :happy2:

ttelracs:

--- Quote from: FJB on January 17, 2023, 10:36:48 am ---When my fuel control module failed (the one under the back seat) the car would not run. I purchased a later revision module on eBay from a Scirocco, I don't remember the part number, but the 1st 3 digits were different, number the same with a different letter at the end. Worked fine straight away when installed, no coding required.

--- End quote ---

I've done this on my previous Mk5 GTI and current Audi 2.0 TFSI.

Uncleben:
I suspected that might be the case.
My battery is disconnected at the moment anyway as the car is just sat there, but good to know for future shenanigans!
Has anyone tried an aftermarket HPFP? There are a couple for around the £130-£150 mark, I might try one just to see as I don't think I can bring myself to give in just yet.
Thanks for all the replies  :happy2:

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