Cdti problems

3disco · 14th May 2019, 12:55

A friend of mine has a 2005 cdti which does not rev over 3000 revs,he has changed the fuel filter but will not rev past this any ideas please.

Lee T · 14th May 2019, 13:02

There are a few things that could Be, test the UBP for a constant flow, If it's good try a leak back test on the injectors.

Heddy · 14th May 2019, 13:05

Check the intercooler hose isn't loose or split, also check a mat isn't rolled up under the accelerator pedal.

3disco · 14th May 2019, 13:12

Thanks for reply’s I don’t think it’s got a under bonnet pump so no problem ther it just hits 3000revs and won’t go past.

Lee T · 14th May 2019, 13:25

Check out the items Heddy mentioned, then try a leakback test.

Heddy · 14th May 2019, 13:30

You could try this
https://www.the75andztclub.co.uk/for...70&postcount=3
Sensor reset
Thought I read too that with this procedure you start the engine afterwards without turning off.

Pueblo_Boy · 14th May 2019, 17:58

Probably not related, but I've had similar problems before...in the Alfa Romeo, it was the MAF...can't remember what it was on the Chrysler 300M, maybe the ECU. It will come back to me! Good luck!

Rover 75 Tourer · 14th May 2019, 21:02

2 possable causes 1 choked cat or 2 problem with the sensor at the end of the hp pump.To check cat disconect exhaust from turbo and then rev engine. Sensor ckeck by replaceing with a spare if you have one.

marinabrian · 14th May 2019, 21:08

The low pressure fuel side is dropping below 150 kPa, and the revs are being limited to 3000 to prevent damage to the high pressure fuel pump

Anybody been inside the tank, perhaps changed the ITP for one from an older car ?

Brian

Mike Noc · 14th May 2019, 21:34

Quote:

Originally Posted by marinabrian

The low pressure fuel side is dropping below 150 kPa, and the revs are being limited to 3000 to prevent damage to the high pressure fuel pump

Anybody been inside the tank, perhaps changed the ITP for one from an older car ?

Brian

As a test try unplugging the LP fuel pressure sensor (the plug on top of the fuel filter) and see if the engine then revs freely.

14th May 2019, 12:55	#1
3disco 3disco ROVER 75 CONN TOURER CDTI and ZTT V8 SE LPG Join Date: Sep 2008 Location: chardstock.axminster,devon Posts: 1,493 Thanks: 361 Thanked 94 Times in 85 Posts	Cdti problems A friend of mine has a 2005 cdti which does not rev over 3000 revs,he has changed the fuel filter but will not rev past this any ideas please.

14th May 2019, 13:02	#2
Lee T Gets stuck in MG ZT Join Date: Jul 2014 Location: Liverpool Posts: 853 Thanks: 180 Thanked 248 Times in 189 Posts	There are a few things that could Be, test the UBP for a constant flow, If it's good try a leak back test on the injectors. __________________ [SIGPIC][/SIGPIC]

14th May 2019, 13:25	#5
Lee T Gets stuck in MG ZT Join Date: Jul 2014 Location: Liverpool Posts: 853 Thanks: 180 Thanked 248 Times in 189 Posts	Check out the items Heddy mentioned, then try a leakback test. __________________ [SIGPIC][/SIGPIC]

14th May 2019, 17:58	#7
Pueblo_Boy Loves to post Rover 75 Tourer Join Date: Nov 2018 Location: Sauchie Posts: 370 Thanks: 66 Thanked 56 Times in 36 Posts	Probably not related, but I've had similar problems before...in the Alfa Romeo, it was the MAF...can't remember what it was on the Chrysler 300M, maybe the ECU. It will come back to me! Good luck! __________________ 24,658th 75 Tourer made, out of 27,407 136th Tourer CDT Contemporary SE (135hp) out of 364 194th 75 Tourer in Firefrost Red out of 518 Firefrost Red 75 Tourers Interior Trim Sports PPH Black, but now with real walnut wooden trim! One of only 20 on the road!

14th May 2019, 21:02	#8
Rover 75 Tourer Avid contributor Rover 75 tourers(4)400turs(3 Join Date: Nov 2016 Location: Largs Posts: 219 Thanks: 3 Thanked 67 Times in 56 Posts	lack of revs over 3000 rpm 2 possable causes 1 choked cat or 2 problem with the sensor at the end of the hp pump.To check cat disconect exhaust from turbo and then rev engine. Sensor ckeck by replaceing with a spare if you have one.

14th May 2019, 13:05	#3
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	Check the intercooler hose isn't loose or split, also check a mat isn't rolled up under the accelerator pedal.

14th May 2019, 13:12	#4
3disco 3disco ROVER 75 CONN TOURER CDTI and ZTT V8 SE LPG Join Date: Sep 2008 Location: chardstock.axminster,devon Posts: 1,493 Thanks: 361 Thanked 94 Times in 85 Posts	Thanks for reply’s I don’t think it’s got a under bonnet pump so no problem ther it just hits 3000revs and won’t go past.

14th May 2019, 13:30	#6
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	You could try this https://www.the75andztclub.co.uk/for...70&postcount=3 Sensor reset Thought I read too that with this procedure you start the engine afterwards without turning off.

14th May 2019, 21:08	#9
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	The low pressure fuel side is dropping below 150 kPa, and the revs are being limited to 3000 to prevent damage to the high pressure fuel pump Anybody been inside the tank, perhaps changed the ITP for one from an older car ? Brian