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Discussion Starter #1
Hi everyone,

Hoping someone can shed some light here. I've bought a vehicle that had a very old code stored in the ECU from a few months back about fuel rail pressure being too low. I cleared it and didn't think much of it. A few weeks later my vehicle went into limp and the fault came up. Came back once a day for the next two days and once again gone for a week or two.

It seems to come and go, and I don't know what's causing it. Once it came up with glow plug no. 5 fault at the same time, but usually it's just P0087.

I dropped off the car at a specialist and they struggled to reproduce the fault all day. They checked injector parameters - all in the normal range. They looked into the pump and found no metal shavings. Connected a gauge and went for a drive, rail pressure was fine. Electronically started the pump in the tank and heard it running. They're giving up now. The only thing they reported is that they found a fault that the mass air flow was too high at idle (or something like that).

My idle is stable, when the engine is cold it's under 900-850rpm and quickly drops and stays stable later. Power wise it seems fine. The fault, when it comes back, seems to happen shortly after switching the engine on and moving off. Happened only when hot so far.
 

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Did you try changing the fuel filter? I had the same thing, although with a highly tuned 3.0 CCWA. Got the code every time at WOT at the end of 3rd shifting into 4th gear. Changing the filter solved it for me. It is fairly cheap and quick so not a complete waste of time to trouble shoot this?

Good luck
 

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Discussion Starter #4
Did you try changing the fuel filter? I had the same thing, although with a highly tuned 3.0 CCWA. Got the code every time at WOT at the end of 3rd shifting into 4th gear. Changing the filter solved it for me. It is fairly cheap and quick so not a complete waste of time to trouble shoot this?

Good luck
Fuel filter has been changed as soon as I bought the car. Thanks though!
 
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