Quote:
Originally Posted by Clavurion
Both fuel pumps get supply via the same K96 relay. So both pumps are active when ignition is on pos.2 but if there is over half tank of fuel the in tank pump is not actually needed. But if inline fuel pump fails there is not enough supply to HP pump and it will reflect on rail pressure.
https://www.pss-autosoft.net/diagram.../E53_EK96A.htm |
That's the one above the fuse box right? Need to remove glovebox for access. I haven't checked that yet - but I could definitely hear it clicking when I was using the prime fuel pump function in ISTA. However it might not be clicking when it fails to start, I'll remove the glovebox and check tomorrow.
I was just having a look at the old pressure regulator (rail+reg from the wreckers on the car now), I can't seem to get it to energise when supplying 12v to it, resistance across it is ~4.3 Ohm. I hooked a small tube up to the end of it, and my compressed air, seems like it's sealed when non-energised - is this correct? I seem to recall reading in in some literature (here:
http://www.londonroadgarage.com/imag...kg&LMCL=UUXura) that it is the other way around.
Quote:
The pressure-regulating valve is pulse width modulated by the DDE, the
more that it is activated the higher the increase in the rail pressure.
If this component is disconnected, no rail pressure is built up and the engine
will stall and not start.
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