75CDT tourer running problem

NOS EXUP · 12th January 2011, 06:50

Hi

My Rover 75 CDT tourer has been running reasonably ok with just slight hesitation around 2500rpm and a little sluggish below 2000 rpm indicating the MAF is not perfect but the car has been driveable with good power and top end performance.

However on my 50 mile journey to work today in heavy rain at motorway speed the car started to hold back and became sluggish - difficult to get the car above 1800 rpm in top gear regardless of how far the accelerator pedal was pushed - There is no engine management light showing but the car seems to be in some sort of limp home type restricting mode.

It is also very sluggish to pull away and feels very restricted.

The car had half tank of diesel in so i filled it up to full and the restriction is still there.

There are no abnormal noises from the engine and when stationary in neutral gear the engine revs freely up to the redline.

The car has been running fine and maybe the rain this morning has caused a problem ??

Car is parked up at work at the moment - Anyone experienced similar or have any suggestions - ?

Is there a way to check any stored codes etc....

Thanks

Nick

Starman · 12th January 2011, 07:45

Hi Nick and welcome along to the forum.

It sounds like your MAF has been out of spec for a while and now died to be fair! If rain has got into the air intake then water may have contaminated it further and caused its demise.

You could unplug it from the engine and see if power returns.. OK for a quick fix but you will be using much more fuel..

There are many posts in the forum regarding this..

Also, as a matter of security, I'd remove your telephone number from your post... We have honest, helpful and true members in our forum, but many who get here by Googling and such may not be!!

Regards, Steve

NOS EXUP · 12th January 2011, 08:52

Thanks Starman

I will try disconnecting the MAF wiring connector at lunch time to see if power returns.

The car is a 2003 model with both under bonnet and in tank fuel pumps - could this be a fuel pump problem ?
I was thinking rain contaminated MAF

Reebmit · 12th January 2011, 08:57

I would be suprised if rain has got to the MAF, I know everyone says it over and over but have you checked your plenums??? because if the ECU side has water in it can cause all sorts of problems

FLYER · 12th January 2011, 09:42

This does sound like a dead or dying MAF , exact same symptoms I experienced with my first CDT.

New maf and all the power returned.
Good idea to check your plenum chamber though as advised.

NOS EXUP · 12th January 2011, 09:44

i cleared plenums recently when i fitted a new clutch

thinking of disconnecting MAF sensor - if performance restored then definitely MAF - ? think this is simplest and cheapest check

FLYER · 12th January 2011, 09:48

Quote:

Originally Posted by NOS EXUP

i cleared plenums recently when i fitted a new clutch

thinking of disconnecting MAF sensor - if performance restored then definitely MAF - ? think this is simplest and cheapest check

yep unplug it and go for a spin , if you have an improvement you need a new one .

NOS EXUP · 12th January 2011, 12:06

Disconnected the MAF and she pulls like a train - Looks like a new MAF or Synergy and pierburg MAF then

12th January 2011, 06:50	#1
NOS EXUP Newbie Rover 75 Tourer Join Date: Aug 2010 Location: Colchester Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	75CDT tourer running problem Hi My Rover 75 CDT tourer has been running reasonably ok with just slight hesitation around 2500rpm and a little sluggish below 2000 rpm indicating the MAF is not perfect but the car has been driveable with good power and top end performance. However on my 50 mile journey to work today in heavy rain at motorway speed the car started to hold back and became sluggish - difficult to get the car above 1800 rpm in top gear regardless of how far the accelerator pedal was pushed - There is no engine management light showing but the car seems to be in some sort of limp home type restricting mode. It is also very sluggish to pull away and feels very restricted. The car had half tank of diesel in so i filled it up to full and the restriction is still there. There are no abnormal noises from the engine and when stationary in neutral gear the engine revs freely up to the redline. The car has been running fine and maybe the rain this morning has caused a problem ?? Car is parked up at work at the moment - Anyone experienced similar or have any suggestions - ? Is there a way to check any stored codes etc.... Thanks Nick Last edited by NOS EXUP; 12th January 2011 at 13:53.. Reason: removing number

12th January 2011, 07:45	#2
Starman Posted a thing or two 03 CDTi Tourer Conn SE auto Join Date: Jul 2007 Location: Shrewsbury Posts: 1,405 Thanks: 0 Thanked 15 Times in 4 Posts	Hi Nick and welcome along to the forum. It sounds like your MAF has been out of spec for a while and now died to be fair! If rain has got into the air intake then water may have contaminated it further and caused its demise. You could unplug it from the engine and see if power returns.. OK for a quick fix but you will be using much more fuel.. There are many posts in the forum regarding this.. Also, as a matter of security, I'd remove your telephone number from your post... We have honest, helpful and true members in our forum, but many who get here by Googling and such may not be!! Regards, Steve __________________ [SIGPIC][/SIGPIC]

12th January 2011, 08:57	#4
Reebmit Gets stuck in Rover 75 Con SE CDTi, 205 GTi 1.9 (x 2), 205 CTi 1.9, 205 GTi Mi16, Ford C-Max 2.0 TDCi Ghia, MR2 GT Join Date: Nov 2008 Location: Alderholt, Nr Fordingbridge Posts: 935 Thanks: 11 Thanked 15 Times in 9 Posts	I would be suprised if rain has got to the MAF, I know everyone says it over and over but have you checked your plenums??? because if the ECU side has water in it can cause all sorts of problems __________________

12th January 2011, 08:52	#3
NOS EXUP Newbie Rover 75 Tourer Join Date: Aug 2010 Location: Colchester Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks Starman I will try disconnecting the MAF wiring connector at lunch time to see if power returns. The car is a 2003 model with both under bonnet and in tank fuel pumps - could this be a fuel pump problem ? I was thinking rain contaminated MAF

12th January 2011, 09:42	#5
FLYER Banned rover75 cdti AUTO TOURER 160 bhp. Join Date: Jul 2010 Location: Glasgow Posts: 35,346 Thanks: 2,985 Thanked 3,685 Times in 2,463 Posts	This does sound like a dead or dying MAF , exact same symptoms I experienced with my first CDT. New maf and all the power returned. Good idea to check your plenum chamber though as advised.

12th January 2011, 09:44	#6
NOS EXUP Newbie Rover 75 Tourer Join Date: Aug 2010 Location: Colchester Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	i cleared plenums recently when i fitted a new clutch thinking of disconnecting MAF sensor - if performance restored then definitely MAF - ? think this is simplest and cheapest check

12th January 2011, 12:06	#8
NOS EXUP Newbie Rover 75 Tourer Join Date: Aug 2010 Location: Colchester Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Disconnected the MAF and she pulls like a train - Looks like a new MAF or Synergy and pierburg MAF then