zt cdti auto holding back?? by chrisjag



chrisjag
Hi I'm new here so hi to all. Just got a 2003 zt cdti 114 auto, at about 40 mph it feels like your are hold the brakes on. Just for few seconds. But it will do this at other speeds. I have cleaned the maf and map, also the egr valve. Found air manifold to have a lot of carbon in it, is now clean. No fault codes are shown. Cleaning it had cleared problem for a few miles but now back again. Can any one point me in the right direction
Many thanks. Chris

Posted 17 Mar 2013, 19:52 #1 

User avatar
1gp
do you have no pull from 1500 to 2000 rpm , i would say you need a new maf sensor , and would also change the intercooler vitron rings.. cleaning the maf dont work sorry to say... if you have alook at the intercooler, bottom hose to the n/s front of car , you will see a mist of oil around the intercooler pipework , if the seals have gone...

Posted 17 Mar 2013, 22:32 #2 


chrisjag
Thanks I will have a look at that, its a bit flat in low revs. The. Fuel is not to go about 26 on a 15 mile runs, at nights in lights of car behind when you put your hard down there's a haze over I respect unburnt derv????

Posted 18 Mar 2013, 08:10 #3 


chrisjag
Sorry fuel not to good 26.7 mpg. When you put your foot down a haze of unburt fuel?

Posted 18 Mar 2013, 08:47 #4 

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Duncan
It's worth looking at the intercooler O rings as already mentioned. The MAF (Mass Air Flow Sensor) measures the airflow into the engine so it can put in the right amount of fuel. If the O rings are leaking and they often do, then measured air is not actually going in, but the fuel is. This means you are down on power, wasting fuel, and creating smoke.

The MAF may still be your problem, but O rings are much cheaper and will need to be done anyway.
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Posted 18 Mar 2013, 09:36 #5 


chrisjag
Thanks, il have a look tonight if home in time and let you all know. Were the best place to get a maf from? Do BMW ones fit? As have a BMW spares next to were I work.

Posted 18 Mar 2013, 09:44 #6 

User avatar
Duncan
At the time I bought mine carparts4less.co.uk were the best selling a genuine one for the Rovers. You have to be careful about some of the non original parts as they perform poorly and don't last. Genuine Bosch is best. Euro car parts also do them and you get 25% off with the forum discount. That will bring you to pretty much the same price as the first place, as they are the same company.

But before you do that, do the Orings. They are a few punds, the MAF is a lot more.
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Posted 18 Mar 2013, 14:21 #7 


chrisjag
Ok are they just o rings? As I have up to 4" o rings on the van all high temp for engines n transmisson. If not il order a set.

Posted 18 Mar 2013, 15:20 #8 

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Mick
(Site Admin)
This is the guide for replacing the intercooler O rings. intercooler-o-rings-fitted-viton-cdt-cdti.html

Posted 18 Mar 2013, 15:23 #9 

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Mick
(Site Admin)
The Viton replacements do not swell up and are a fit and forget replacement. http://www.ebay.co.uk/itm/High-Specific ... 3f229f4e94

Posted 18 Mar 2013, 15:28 #10 


chrisjag
Thanks Mick do you know anyone in east Kent with a T4 (Testbook version 4.Computer Diagnostic System)? Wife hates doors locking when you drive off lol

Posted 18 Mar 2013, 15:57 #11 

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Bermudan 75
Mick wrote:The Viton replacements do not swell up and are a fit and forget replacement. http://www.ebay.co.uk/itm/High-Specific ... 3f229f4e94


How many do you need? is it a set of 2 or 2 sets?

Cheers

Mike
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Posted 18 Mar 2013, 19:30 #12 

User avatar
1gp
Rover418275 wrote:
Mick wrote:The Viton replacements do not swell up and are a fit and forget replacement. http://www.ebay.co.uk/itm/High-Specific ... 3f229f4e94


How many do you need? is it a set of 2 or 2 sets?

Cheers

Mike

a set of two.

Posted 18 Mar 2013, 19:42 #13 

User avatar
Bermudan 75
1gp wrote:
Rover418275 wrote:
Mick wrote:The Viton replacements do not swell up and are a fit and forget replacement. http://www.ebay.co.uk/itm/High-Specific ... 3f229f4e94


How many do you need? is it a set of 2 or 2 sets?

Cheers

Mike

a set of two.


Thanks, James
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Posted 18 Mar 2013, 22:33 #14 


chrisjag
Hi all got o rings, egr cleaned out, intake manifold cleaned out, a maf sendor off of another car plus a map sensor. Cleaned all air pipes,, wish me luck lol let you know how it gos. Ps with maf disconnected it flys, but 15 mph

Posted 20 Mar 2013, 19:33 #15 

User avatar
Duncan
If it improves with MAF disconnected, it probably is the MAF. Happened with Steve's (Arctic) car.
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Posted 20 Mar 2013, 19:37 #16 


chrisjag
Sorry 15 mpg

Posted 20 Mar 2013, 20:44 #17 

User avatar
Arctic
(Trader)
I would agree with above new MAF and also change the PCV (Positive Crankcase Ventilation Valve) filter, air filter, fuel filter, pollen filter in a word full service if not done in last 12 months few links below for you,Arctic
http://www.ebay.co.uk/itm/230863357336? ... 1438.l2649

http://www.ebay.co.uk/itm/130860509540? ... 1438.l2649

http://www.ebay.co.uk/itm/271170497293? ... 1438.l2649

Posted 21 Mar 2013, 17:32 #18 


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