intermittent problem starting

petie · 25th March 2015, 19:06

Hi all got a bit of a strange problem with my CDT
Every now and again it refuses to start. But it seems
If I leave it for 20 mins it will start first time! Obviously
The worry is there that one day it won't any ideas?? Thanks

Heddy · 25th March 2015, 19:10

Dodgy UBP (under bonnet pump) dirty/faulty cam sensor (warm engine). Dirty/loose starter motor connection (not cranking) Simplest and most common faults.

Mike Noc · 25th March 2015, 19:23

Quote:

Originally Posted by petie

Hi all got a bit of a strange problem with my CDT
Every now and again it refuses to start. But it seems
If I leave it for 20 mins it will start first time! Obviously
The worry is there that one day it won't any ideas?? Thanks

Just to help narrow your fault down does it refuse to crank, and if so do you hear clicking or just a single click, or does it crank but not start, does this happen from a cold start, hot start or both, and once started does the car run OK?

If it isn't cranking then bad starter motor control cable connection or solenoid contacts are worn.

If it cranks but doesn't fire up then failing cam sensor or worn injectors are two common causes, or as Heddy mentions a failing under bonnet LP fuel pump - sometimes they start up if you tap them.

petie · 25th March 2015, 19:28

Hi it turns over but just doesn't fire up and only
Seems to do it when its up to temp but once its
Started it will run without issue

Heddy · 25th March 2015, 19:35

http://www.ebay.co.uk/itm/ROVER-75-B...item51ce0fd885
New ones are around £65, try cleaning it, worked for me

Mike Noc · 25th March 2015, 19:37

Could be the cam sensor then. Next time it does it check that the under bonnet fuel pump is working, and if it is then try whipping the cam sensor out and leaving it in the freezer for 10 minutes.

If it then starts you need a new one, and if it still doesn't start carry out an injector leakback test.

Mickyboy · 25th March 2015, 19:38

So it starts fine from cold? If so it's probably cam sensor as this is typical symptoms, if you need a cam sensor I've got one for sale and it's only a five min job, one bolt.

Kindest regards mick

john o · 25th March 2015, 20:01

I had almost the same problem, look up your nearest member with a t4 and check the high pressure fuel pump pressure failing a t4 get a bosch specialist to check the pressure.
Try a squirt of easy start if it starts and runs then that's where you need to look
Hope this helps

25th March 2015, 19:06	#1
petie Newbie rover 75 saloon Join Date: Jan 2015 Location: poole Posts: 21 Thanks: 3 Thanked 0 Times in 0 Posts	intermittent problem starting Hi all got a bit of a strange problem with my CDT Every now and again it refuses to start. But it seems If I leave it for 20 mins it will start first time! Obviously The worry is there that one day it won't any ideas?? Thanks

25th March 2015, 19:38	#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	So it starts fine from cold? If so it's probably cam sensor as this is typical symptoms, if you need a cam sensor I've got one for sale and it's only a five min job, one bolt. Kindest regards 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]

25th March 2015, 20:01	#8
john o Regular poster rover 75 cdt tourer Join Date: Apr 2011 Location: Coventry Posts: 53 Thanks: 22 Thanked 4 Times in 4 Posts	I had almost the same problem, look up your nearest member with a t4 and check the high pressure fuel pump pressure failing a t4 get a bosch specialist to check the pressure. Try a squirt of easy start if it starts and runs then that's where you need to look Hope this helps __________________ Membership number :-237 Pierburg maf + synergy box..OH YES!! Ecu drains sorted New clutch new high pressure fuel pump new rear springs ( empty wallet )

25th March 2015, 19:10	#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	Dodgy UBP (under bonnet pump) dirty/faulty cam sensor (warm engine). Dirty/loose starter motor connection (not cranking) Simplest and most common faults.

25th March 2015, 19:28	#4
petie Newbie rover 75 saloon Join Date: Jan 2015 Location: poole Posts: 21 Thanks: 3 Thanked 0 Times in 0 Posts	Hi it turns over but just doesn't fire up and only Seems to do it when its up to temp but once its Started it will run without issue

25th March 2015, 19:35	#5
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	http://www.ebay.co.uk/itm/ROVER-75-B...item51ce0fd885 New ones are around £65, try cleaning it, worked for me

25th March 2015, 19:37	#6
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,589 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Could be the cam sensor then. Next time it does it check that the under bonnet fuel pump is working, and if it is then try whipping the cam sensor out and leaving it in the freezer for 10 minutes. If it then starts you need a new one, and if it still doesn't start carry out an injector leakback test.