I'd forgotten about this thread! Got some useful stuff here for my guide, cheers for the reminder lol.
Getting on just fine actually, she runs! I would say your problem is probably down to the FPS, the 4.99v is the sensor signal, which operates in a range of ~1.3 - 4.99 (~1.3 being the equivalent of ~280bar - fuel pressure at cranking speed). Showing as 4.99 permanently would say to me it's knackered.
I didn't fix mine until I got it on PP2000, the amount of information you get from it is brilliant, but still didn't reveal the problem... As it goes I think the solution was the HP pump. Mainly because i can't think of anything else i changed between then and the car starting (I changed the HP pump back in december - quite hard to remember that far back lol). There was the battery, but i'd swapped the battery over more than once previously and it showed every indication of being fine before i left it sat in the car for 4 months.
What happened was a bit odd, i got it on pp2k and it showed every indication of being fine except for showing zero rail pressure. This was odd because there should be pressure in the rail from the lift pump, even if i wasn't cranking the engine. Swapped the lift pump, fps and fpr for known-good items and got the same result. Checked all connections, unions, fittings, had a look at the fuel pipes for blockages, tested the loom; all fine... Tried to start it one last time before giving up and scrapping it, what do you know she suddenly magically showed rail pressure at normal levels and fired straight up. This was a couple of weeks ago now, she has started fist time, every time ever since.
I haven't had a chance to test for cutting out problems yet as she's not all in one piece, but will report back soon on that
Getting on just fine actually, she runs! I would say your problem is probably down to the FPS, the 4.99v is the sensor signal, which operates in a range of ~1.3 - 4.99 (~1.3 being the equivalent of ~280bar - fuel pressure at cranking speed). Showing as 4.99 permanently would say to me it's knackered.
I didn't fix mine until I got it on PP2000, the amount of information you get from it is brilliant, but still didn't reveal the problem... As it goes I think the solution was the HP pump. Mainly because i can't think of anything else i changed between then and the car starting (I changed the HP pump back in december - quite hard to remember that far back lol). There was the battery, but i'd swapped the battery over more than once previously and it showed every indication of being fine before i left it sat in the car for 4 months.
What happened was a bit odd, i got it on pp2k and it showed every indication of being fine except for showing zero rail pressure. This was odd because there should be pressure in the rail from the lift pump, even if i wasn't cranking the engine. Swapped the lift pump, fps and fpr for known-good items and got the same result. Checked all connections, unions, fittings, had a look at the fuel pipes for blockages, tested the loom; all fine... Tried to start it one last time before giving up and scrapping it, what do you know she suddenly magically showed rail pressure at normal levels and fired straight up. This was a couple of weeks ago now, she has started fist time, every time ever since.
I haven't had a chance to test for cutting out problems yet as she's not all in one piece, but will report back soon on that