MG ZTT cdti wont start

cabs · 7th July 2014, 10:16

Hi guys,

first post so 'Hello'. My MG ZTT cdti (03) has an intermittent starting problem. After 3 breakdowns (the last one on Sunday)I have replaced the crankshaft sensor and camshaft sensor. I have searched on this forum and done the electrical side of the diagnostics, the only one that was different was the HP fuel sensor showed 0.8v when cranking. It started after the last non start breakdown and yesterday morning but it fails to start today. I have tried starting it on easy start and am now at a loss of what to do next. Any pointers would be appreciated.

Thanks

DMGRS · 7th July 2014, 10:48

How does the under bonnet fuel pump (to the left of the battery) sound? Is it quiet, or making any odd noises?

cabs · 7th July 2014, 11:12

Hi, thanks for the reply.

it sounds fine, no odd noises. It looks like the fuel pressure is ok from the 2 pumps as the voltage is about what it says on the 'How to..'. Battery is flat at the moment so wont be able to do any more until tomorrow morning.

Been looking back at the old threads and found one about the ecu, I cannot remember if the oil light was on so will look tomorrow.

thanks

trikey · 7th July 2014, 11:18

Speak to Seancar in Bexhill, he has a T4 and will pinpoint the fault.

DMGRS · 7th July 2014, 12:12

Quote:

Originally Posted by cabs

Hi, thanks for the reply.

it sounds fine, no odd noises. It looks like the fuel pressure is ok from the 2 pumps as the voltage is about what it says on the 'How to..'. Battery is flat at the moment so wont be able to do any more until tomorrow morning.

Been looking back at the old threads and found one about the ecu, I cannot remember if the oil light was on so will look tomorrow.

thanks

In that case, as Trikey suggests it's probably time for a T4 session.

FrenchMike · 7th July 2014, 12:30

Quote:

Originally Posted by cabs

Hi guys,

first post so 'Hello'. My MG ZTT cdti (03) has an intermittent starting problem. After 3 breakdowns (the last one on Sunday)I have replaced the crankshaft sensor and camshaft sensor. I have searched on this forum and done the electrical side of the diagnostics, the only one that was different was the HP fuel sensor showed 0.8v when cranking. It started after the last non start breakdown and yesterday morning but it fails to start today. I have tried starting it on easy start and am now at a loss of what to do next. Any pointers would be appreciated.

Thanks

Hi,
I guess you have done my tests

0.8 volt on the HP sensor is too low .
Certainly a leaky injector .
Please lead the injector leakback test:

LB test.jpg

Good luck

Mike

cabs · 7th July 2014, 21:23

Thanks for all the replies. I will see how I get on tomorrow then get a T4 diagnostic done.

Are there any relays/fuses that need checking?

Thanks

JJ75 · 7th July 2014, 22:52

Might be worth a quick check around the injectors for signs of diesel,mine must have had 2 injectors replaced before i bought it and they were loose,was very difficult to start and when finally started,ran rougher than a Barnsley call girl!
Probably not your problem but hey,worth a look,takes 5 minutes.

seancar · 7th July 2014, 22:57

Sounds like diesel leak back, but with easy start should still fire up. I have injectors here pumps etc, and if you cant get it running I will t4 it

seancar · 7th July 2014, 22:58

Quote:

Originally Posted by trikey

Speak to Seancar in Bexhill, he has a T4 and will pinpoint the fault.

Ive got 2 now lol being greedy

7th July 2014, 10:16	#1
cabs Newbie mg ztt Join Date: May 2013 Location: lydd Posts: 10 Thanks: 0 Thanked 1 Time in 1 Post	MG ZTT cdti wont start Hi guys, first post so 'Hello'. My MG ZTT cdti (03) has an intermittent starting problem. After 3 breakdowns (the last one on Sunday)I have replaced the crankshaft sensor and camshaft sensor. I have searched on this forum and done the electrical side of the diagnostics, the only one that was different was the HP fuel sensor showed 0.8v when cranking. It started after the last non start breakdown and yesterday morning but it fails to start today. I have tried starting it on easy start and am now at a loss of what to do next. Any pointers would be appreciated. Thanks

7th July 2014, 10:48	#2
DMGRS Discount MG Rover Spares Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011 Location: Hythe, Southampton Posts: 11,320 Thanks: 456 Thanked 3,377 Times in 2,027 Posts	How does the under bonnet fuel pump (to the left of the battery) sound? Is it quiet, or making any odd noises? __________________ Your trusted MG Rover specialist! Tel: 02380 001133 / Email: [email protected] We now have a 'chat' function on our site for even quicker replies. Give it a try! Remember - discount code FORUM5 for 5% off

7th July 2014, 11:18	#4
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,765 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Speak to Seancar in Bexhill, he has a T4 and will pinpoint the fault. __________________ Lest we forget..

7th July 2014, 22:52	#8
JJ75 Loves to post Rover 75 CDTI Connoisseur SE Join Date: Apr 2014 Location: Sheffield Posts: 464 Thanks: 44 Thanked 104 Times in 72 Posts	Might be worth a quick check around the injectors for signs of diesel,mine must have had 2 injectors replaced before i bought it and they were loose,was very difficult to start and when finally started,ran rougher than a Barnsley call girl! Probably not your problem but hey,worth a look,takes 5 minutes. __________________ [SIGPIC][/SIGPIC] Statistically, 132% of people tend to exaggerate! ~~~~~~~~~~~~~~~~~~ If you have a lisp, don't expect to be taken seriously when you tell people you are an assassin.

7th July 2014, 11:12	#3
cabs Newbie mg ztt Join Date: May 2013 Location: lydd Posts: 10 Thanks: 0 Thanked 1 Time in 1 Post	Hi, thanks for the reply. it sounds fine, no odd noises. It looks like the fuel pressure is ok from the 2 pumps as the voltage is about what it says on the 'How to..'. Battery is flat at the moment so wont be able to do any more until tomorrow morning. Been looking back at the old threads and found one about the ecu, I cannot remember if the oil light was on so will look tomorrow. thanks

7th July 2014, 21:23	#7
cabs Newbie mg ztt Join Date: May 2013 Location: lydd Posts: 10 Thanks: 0 Thanked 1 Time in 1 Post	Thanks for all the replies. I will see how I get on tomorrow then get a T4 diagnostic done. Are there any relays/fuses that need checking? Thanks

7th July 2014, 22:57	#9
seancar Banned 75 tourer and t4 Join Date: Mar 2011 Location: bexhill on sea Posts: 4,428 Thanks: 278 Thanked 731 Times in 350 Posts	Sounds like diesel leak back, but with easy start should still fire up. I have injectors here pumps etc, and if you cant get it running I will t4 it