cdti not starting

mo12 · 23rd December 2017, 14:55

My zt cdti will only start when given a squirt of easy start and when running its fine. Turn it off and it wont start again. Any ideas anyone ?

Heddy · 23rd December 2017, 16:04

Those symptoms pointed to a failing underbonnet pump (UBP) on mine. Poor starting on a warm engine is usually deemed to be a faulty CAM sensor.

mo12 · 23rd December 2017, 16:57

Changed cam & crank sensor. Plenty of fuel coming out of fuel filter, ubp & in tank pump both making noises.

marinabrian · 23rd December 2017, 18:13

It is most likely to be a leaking injector causing that sort of problem.

Do a leakback test to reveal the culprit

Brian

Number 6 · 23rd December 2017, 18:24

Quote:

Originally Posted by mo12

My zt cdti will only start when given a squirt of easy start and when running its fine. Turn it off and it wont start again. Any ideas anyone ?

Had the same on mine,turned out to be the "O" ring on the HP pump regulator..

Dart2050 · 23rd December 2017, 19:50

Mines began not starting this week. Usually ok, but sometimes not. There is a humming coming from the fuel filter area which only started a week ago and I can hear it with engine on and off!

Mickyboy · 23rd December 2017, 21:32

As Brian has already beat me to it I’d agree injector issue, grab your bottles and do a leakback test I’ll even guess at either number 1 or number 3 those two seem to play up first for some odd reason
Mick

mo12 · 24th December 2017, 07:38

Are injectors the same on a cdt as a cdti,? I have a cdt 75 which I'm using for parts which was running fine.

marinabrian · 24th December 2017, 09:41

Quote:

Originally Posted by mo12

Are injectors the same on a cdt as a cdti,? I have a cdt 75 which I'm using for parts which was running fine.

Yes they are the same

COLVERT · 24th December 2017, 20:39

Quote:

Originally Posted by Dart2050

Mines began not starting this week. Usually ok, but sometimes not. There is a humming coming from the fuel filter area which only started a week ago and I can hear it with engine on and off!

That sounds like your under-bonnet pump is about to fail.

23rd December 2017, 14:55	#1
mo12 Regular poster rover 75 saloon Join Date: Dec 2015 Location: Battle Posts: 40 Thanks: 2 Thanked 6 Times in 6 Posts	cdti not starting My zt cdti will only start when given a squirt of easy start and when running its fine. Turn it off and it wont start again. Any ideas anyone ?

23rd December 2017, 21:32	#7
Mickyboy This is my second home MG ZT CDTI 135 + & MGZT CDTI AUTO 160 & ROVER 75 TOURER CDTI 160 TROPHY YELLOW Join Date: Aug 2013 Location: Hernebay Posts: 4,331 Thanks: 818 Thanked 2,414 Times in 1,141 Posts	As Brian has already beat me to it I’d agree injector issue, grab your bottles and do a leakback test I’ll even guess at either number 1 or number 3 those two seem to play up first for some odd reason Mick __________________ [SIGPIC][/SIGPIC] T4 Owner Jobs done : new UBP, Spy hole mod, Rear hub(wheel bearing),plenum cleaned and emptied, Inline thermostat fitted,Full service, In car Digital tv/DVD Bluetooth Satnav etc, Replaced UBP, Restored headlights,Fixed airbag connection.replaced HP pump,replaced rear light seals,changed intercooler O rings. Jobs to do: ,replace drivers lock,.[/SIZE]

23rd December 2017, 16:04	#2
Heddy This is my second home None Join Date: Feb 2013 Location: None Posts: 5,556 Thanks: 465 Thanked 1,161 Times in 924 Posts	Those symptoms pointed to a failing underbonnet pump (UBP) on mine. Poor starting on a warm engine is usually deemed to be a faulty CAM sensor.

23rd December 2017, 16:57	#3
mo12 Regular poster rover 75 saloon Join Date: Dec 2015 Location: Battle Posts: 40 Thanks: 2 Thanked 6 Times in 6 Posts	Changed cam & crank sensor. Plenty of fuel coming out of fuel filter, ubp & in tank pump both making noises.

23rd December 2017, 18:13	#4
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	It is most likely to be a leaking injector causing that sort of problem. Do a leakback test to reveal the culprit Brian

23rd December 2017, 19:50	#6
Dart2050 Loves to post Rover 75 Connie SE CDTI Tourer, MGF and Triumph Bonneville America Join Date: Apr 2013 Location: Stroud Posts: 443 Thanks: 321 Thanked 65 Times in 49 Posts	Mines began not starting this week. Usually ok, but sometimes not. There is a humming coming from the fuel filter area which only started a week ago and I can hear it with engine on and off!

24th December 2017, 07:38	#8
mo12 Regular poster rover 75 saloon Join Date: Dec 2015 Location: Battle Posts: 40 Thanks: 2 Thanked 6 Times in 6 Posts	Are injectors the same on a cdt as a cdti,? I have a cdt 75 which I'm using for parts which was running fine.