Need help asap with a non starting ZT diesel please!

daznkel · 30th December 2018, 22:11

As above I need some help with my son-in-laws non starting ZT diesel please.

The car has been running fine up until xmas eve.

He used it as usual to commute to work and back, all was good. Parked up on the driveway about 2pm. At 6pm went to go out and the car would not start.
When the emergency crew arrived (Me & the toolbox), I checked the battery, fuel pumps, (Both running fine) all was good. I then removed, cleaned and replaced the cam sensor, to no avail. As it was getting dark I said I would return after boxing day.
Upon my return on the 27th, the car would turn over, but not fire up. I connected the laptop with TOAF and looked for logged faults (One about RPM Sensor, Cant remember the code, Faulty Crank sensor??) and then read the "Live Data" from the engine to make sure the low pressure fuel supply was ok, 3.5 bar was shown.
I gave a squirt of easy start, and it fired up, but then died as few seconds later.

I returned home, confused and then read various threads on here. Particularly THIS one.
As a result, these are the things checked thus far;

The plenum is clean and dry. Disconnected the battery, then ECU and checked for "tidelines" and water damage, nothing apparent.

Starts on easy start, but only runs for a few seconds, then dies.

VBattery measured at the crank sensor, when disconnected and key in pos 2, 11.99V,

3.99V Measured at the low pressure sensor on top of the fuel filter (Complicit with TOAF reading 3.5bar),

HP Rail sensor measured at 0.51 (Key pos 2) and 1.25V when cranking (Complicit with seeing at least 250-320bar fluctuating on TOAF when cranking),

No signs of any diesel leak anywhere, particularly around injectors,

Clamped each leak off pipe between injectors 4-3, 3-2, 2-1 etc when cranking, no fire,

I assume the immobiliser etc is ok as the car fires on easy start?

How do I test the Crank sensor?

I have had the battery on charge since this morning, and when charged, I will refit and do a leak back test. I am assuming that they will be ok though, as when clamped between pipes and cranking, it never tried to fire, at all.

Anyone got any further ideas? Any help/advice is greatly appreciated.

30th December 2018, 22:11	#1
daznkel Posted a thing or two 04 MG ZT+ 190 XPG & 99 (T) Dealer Launch 75 V6 Connie Auto Join Date: Oct 2012 Location: Plymouth Posts: 1,080 Thanks: 615 Thanked 456 Times in 309 Posts	Need help asap with a non starting ZT diesel please! As above I need some help with my son-in-laws non starting ZT diesel please. The car has been running fine up until xmas eve. He used it as usual to commute to work and back, all was good. Parked up on the driveway about 2pm. At 6pm went to go out and the car would not start. When the emergency crew arrived (Me & the toolbox), I checked the battery, fuel pumps, (Both running fine) all was good. I then removed, cleaned and replaced the cam sensor, to no avail. As it was getting dark I said I would return after boxing day. Upon my return on the 27th, the car would turn over, but not fire up. I connected the laptop with TOAF and looked for logged faults (One about RPM Sensor, Cant remember the code, Faulty Crank sensor??) and then read the "Live Data" from the engine to make sure the low pressure fuel supply was ok, 3.5 bar was shown. I gave a squirt of easy start, and it fired up, but then died as few seconds later. I returned home, confused and then read various threads on here. Particularly THIS one. As a result, these are the things checked thus far; The plenum is clean and dry. Disconnected the battery, then ECU and checked for "tidelines" and water damage, nothing apparent. Starts on easy start, but only runs for a few seconds, then dies. VBattery measured at the crank sensor, when disconnected and key in pos 2, 11.99V, 3.99V Measured at the low pressure sensor on top of the fuel filter (Complicit with TOAF reading 3.5bar), HP Rail sensor measured at 0.51 (Key pos 2) and 1.25V when cranking (Complicit with seeing at least 250-320bar fluctuating on TOAF when cranking), No signs of any diesel leak anywhere, particularly around injectors, Clamped each leak off pipe between injectors 4-3, 3-2, 2-1 etc when cranking, no fire, I assume the immobiliser etc is ok as the car fires on easy start? How do I test the Crank sensor? I have had the battery on charge since this morning, and when charged, I will refit and do a leak back test. I am assuming that they will be ok though, as when clamped between pipes and cranking, it never tried to fire, at all. Anyone got any further ideas? Any help/advice is greatly appreciated. __________________ Click HERE To Be Added To The South West Members Location Map Upgrades/Mods so far: Custom Angel Eye DRL's, MG7 Rear lights, Custom Door Cards, MGR Plates, Red Alcantara Seats, Black Oak Dash, Powerflex bushes, Plenum Spy Mod, Rear Light Seals, 5000K HID Kit, Navall 3 DD, Blue LED Conversion, Custom badges, Union badges, Flip key. Working on more! [SIGPIC][/SIGPIC]