Cdti warm start issue - Page 2

marinabrian · 24th July 2015, 12:38

Quote:

Originally Posted by trebor

the cam sensor has not been mentioned so far unless i have missed it, that is often the cause of warm starting issues for the diesel, so have your leak back test done and if thats ok that would be my next call

It is in the OP's original description Rob, the car sometimes starts if bumped, so the cam sensor will be ok

He's changed the crank sensor, unnecessarily and the symptoms are right up there with injector leakback which is why Mike suggested it.

I have seen cars with excessive leakback start when "jumped" as the extra oomph supplied to the starter spins the engine that little bit faster

Leakback is also more evident when the engine is warm, as the fuel oil is less viscous and leaks more readily past the valving in the injector.

Brian

Boulton85 · 24th July 2015, 19:32

Well just on the off chance I took the camshaft sensor out and put it in the fridge to cool it down but no joy so it's looking more like the injectors

Boulton85 · 25th July 2015, 07:31

Well just had the test done and it turns out that 2 / 4 are leaking

Mike Noc · 25th July 2015, 07:41

You can get them reconditioned to save on the cost of buying new ones Marc. Lynx Diesels have often been recommended on the forum, although I haven't used them myself.

Boulton85 · 25th July 2015, 07:55

Yeah found some close to home at a company called firth diesel injection £110+vat each exchange units

MrDoodles · 25th July 2015, 07:56

Not being a diesel expert, but as the other injectors have done exactly the same mileage as the one's that are leaking, what's the perceived wisdom from the experts on the site about replacing all of them, rather than just the two that are currently leaking?

Boulton85 · 25th July 2015, 07:58

I'm guessing they some the same mileage but keeping the cost down if this fix's the issue then I can change other two ata later date

Boulton85 · 25th July 2015, 10:45

Got 2 reconed / exchange units with a years guarantee £182.40

Boulton85 · 27th July 2015, 22:08

Well injectors are here so going to fit them tomorrow 😊 I'm
Not sure if car down on power etc as its my first one and it feels the same as when I picked it up so if I change the injectors will I feel a difference?

Mike Noc · 27th July 2015, 23:18

Wouldn't have thought so. A failing MAF can cause the engine to feel sluggish. It will also feel the same if it is a 116. 135 feels better, and the 160 bhp remap is the way to go.

24th July 2015, 19:32	#12
Boulton85 Newbie MG ZT Join Date: Jul 2015 Location: chesterfield Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post	Well just on the off chance I took the camshaft sensor out and put it in the fridge to cool it down but no joy so it's looking more like the injectors

25th July 2015, 07:31	#13
Boulton85 Newbie MG ZT Join Date: Jul 2015 Location: chesterfield Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post	Well just had the test done and it turns out that 2 / 4 are leaking

25th July 2015, 07:41	#14
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: 11,569 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	You can get them reconditioned to save on the cost of buying new ones Marc. Lynx Diesels have often been recommended on the forum, although I haven't used them myself.

25th July 2015, 07:55	#15
Boulton85 Newbie MG ZT Join Date: Jul 2015 Location: chesterfield Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post	Yeah found some close to home at a company called firth diesel injection £110+vat each exchange units

25th July 2015, 07:56	#16
MrDoodles Banned MG ZT+ V6 190 Join Date: Nov 2011 Location: Spalding Posts: 13,245 Thanks: 369 Thanked 1,196 Times in 818 Posts	Not being a diesel expert, but as the other injectors have done exactly the same mileage as the one's that are leaking, what's the perceived wisdom from the experts on the site about replacing all of them, rather than just the two that are currently leaking?

25th July 2015, 07:58	#17
Boulton85 Newbie MG ZT Join Date: Jul 2015 Location: chesterfield Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post	I'm guessing they some the same mileage but keeping the cost down if this fix's the issue then I can change other two ata later date

25th July 2015, 10:45	#18
Boulton85 Newbie MG ZT Join Date: Jul 2015 Location: chesterfield Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post	Got 2 reconed / exchange units with a years guarantee £182.40

27th July 2015, 22:08	#19
Boulton85 Newbie MG ZT Join Date: Jul 2015 Location: chesterfield Posts: 21 Thanks: 0 Thanked 1 Time in 1 Post	Well injectors are here so going to fit them tomorrow 😊 I'm Not sure if car down on power etc as its my first one and it feels the same as when I picked it up so if I change the injectors will I feel a difference?

27th July 2015, 23:18	#20
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: 11,569 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Wouldn't have thought so. A failing MAF can cause the engine to feel sluggish. It will also feel the same if it is a 116. 135 feels better, and the 160 bhp remap is the way to go.