Recently I had a failed Under Bonnet Pump and then replaced this with a known good secondhand unit, which has subsequently failed some 3 weeks later. It was working intermittently so I had my 75 on Russ' T4 (Testbook version 4.Computer Diagnostic System) and this showed low pressure (94KPa) on the low pressure side (minimum of 121KPa required).
So have bought a new pump and am now getting very good pressure (350+KPa) on the low pressure side. Problem solved we thought, but no. Have good pressure on the low and high pressure side but car won't start.
ECU (Engine Control Unit) has not got wet, or at least are no signs it has, and T4 can communicate with it and get real time readings from it.
Tried starting on easy start (well was actually contact cleaner but should have worked) and no joy, almost fired but not quite.
Cam sensor replaced with known good one, from Russ' Tourer, no difference.
No fault codes on the T4
Have to say I didn't pay any attention to the tacho to see if it was moving during cranking but am fairly certain rpm was showing on T4 when cranking.
Car is located long way from home. Am going back over tomorrow so looking for any ideas as to what to try next?
Member No. 143
Mods so far: LED sidelights, interior lights and number plate lamps, Rover Xenon Headlights, Kenlowe Fan, Synergy 2 and EGR Bypass