03' cdti pickup

Geraint · 21st June 2014, 22:14

Hi

I have an 03'75 cdti auto and it has developed a problem. It starts fine and runs smoothly but has a very slow pickup until the turbo kicks in - makes roundabouts dodgy. If you just accelerate slowly it will bring the turbo in and all is well but if you press down on the accelerator it just hold as though in limp mode and eventually the turbo kicks in. Also it will not go past 4000rpm in park.

I have changed the MAF with a new one - any thoughts are welcome (mileage is 124k)

Geraint

Rick-sta · 21st June 2014, 22:24

Hmmm the only time mine did the exact same thing was when I had a bad maf. Have u tried unplugging the new maf incase its faulty or got a bit of dirt on it?

wuzerk · 22nd June 2014, 09:14

As above, this is the classic symptom of a failing Maf. Just unplug it. If it restores performance then you can run for as long as you like without it until you obtain a new one. Avoid the cheap ones on E bay

marinabrian · 22nd June 2014, 09:46

Quote:

Originally Posted by Geraint

Hi

I have an 03'75 cdti auto and it has developed a problem. It starts fine and runs smoothly but has a very slow pickup until the turbo kicks in - makes roundabouts dodgy. If you just accelerate slowly it will bring the turbo in and all is well but if you press down on the accelerator it just hold as though in limp mode and eventually the turbo kicks in. Also it will not go past 4000rpm in park.

I have changed the MAF with a new one - any thoughts are welcome (mileage is 124k)

Geraint

If you are concerned about MAF performance, or what could be causing this problem, you could contact member Kenton, who is in your neck of the woods and has T4.

If the MAF readings are within spec, then I would suspect the EGR valve is remaining open for longer than it should.

Hope this helps

Brian

Kenton · 26th July 2014, 19:45

Quote:

Originally Posted by marinabrian

If you are concerned about MAF performance, or what could be causing this problem, you could contact member Kenton, who is in your neck of the woods and has T4.

If the MAF readings are within spec, then I would suspect the EGR valve is remaining open for longer than it should.

Hope this helps

Brian

Thanks Brian, for the mention, have changed 3 EGR's in the last month, that would be my first thought?, but MAF is also an option

Mike Noc · 26th July 2014, 20:24

Well I've obviously miss-read the title of this thread. A 75 pickup - I was hoping to see a couple of photos of a one-off Ute. Oh well.

tourer · 27th July 2014, 10:28

Quote:

Originally Posted by Mike Noc

Well I've obviously miss-read the title of this thread. A 75 pickup - I was hoping to see a couple of photos of a one-off Ute. Oh well.

clf · 27th July 2014, 12:14

Did this start after replacing the maf? Reason I ask, if it did, is there a possibility of some sort of blockage after the maf, the maf would should the amount of air entering the engine, and fuel accordingly, but if the air wasn't getting to the engine, it would overfuel, and run badly.

ceedy · 27th July 2014, 13:14

Quote:

Originally Posted by tourer

and me !!

21st June 2014, 22:14	#1
Geraint Regular poster Rover 75 CDTi Manual Join Date: May 2012 Location: Borehamwood Posts: 43 Thanks: 15 Thanked 1 Time in 1 Post	03' cdti pickup Hi I have an 03'75 cdti auto and it has developed a problem. It starts fine and runs smoothly but has a very slow pickup until the turbo kicks in - makes roundabouts dodgy. If you just accelerate slowly it will bring the turbo in and all is well but if you press down on the accelerator it just hold as though in limp mode and eventually the turbo kicks in. Also it will not go past 4000rpm in park. I have changed the MAF with a new one - any thoughts are welcome (mileage is 124k) Geraint

21st June 2014, 22:24	#2
Rick-sta This is my second home MG ZT 2.0 CDTI+ in Typhoon, MG TF 135 in Typhoon & Rover 75 Connoisseur CDTI SE in Pearl Black Join Date: Oct 2012 Location: Norfolk Posts: 7,536 Thanks: 2,718 Thanked 2,827 Times in 1,462 Posts	Hmmm the only time mine did the exact same thing was when I had a bad maf. Have u tried unplugging the new maf incase its faulty or got a bit of dirt on it? __________________ How to retrofit Cruise Control on a diesel with no OEM wiring in place: Link How to retrofit heated electric memory seats with no OEM wiring in place: Link How to operate FBH and ATC via text Link How to restore cloudy projector headlights Link

22nd June 2014, 09:14	#3
wuzerk Passed Away Rover 75 CDT 03 auto Conn. SE Join Date: May 2009 Location: London Posts: 2,885 Thanks: 104 Thanked 254 Times in 204 Posts	Sluggish As above, this is the classic symptom of a failing Maf. Just unplug it. If it restores performance then you can run for as long as you like without it until you obtain a new one. Avoid the cheap ones on E bay

27th July 2014, 12:14	#8
clf This is my second home MG ZT CDTi Join Date: Jan 2014 Location: carrick Posts: 7,859 Thanks: 3,494 Thanked 2,657 Times in 1,973 Posts	Did this start after replacing the maf? Reason I ask, if it did, is there a possibility of some sort of blockage after the maf, the maf would should the amount of air entering the engine, and fuel accordingly, but if the air wasn't getting to the engine, it would overfuel, and run badly. __________________ It is not gloss primer .............. it is duct tape silver!

26th July 2014, 20:24	#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: 11,578 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Well I've obviously miss-read the title of this thread. A 75 pickup - I was hoping to see a couple of photos of a one-off Ute. Oh well.