Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 26th January 2020, 16:35   #1
davidson476
Newbie
 
mgzt

Join Date: Nov 2015
Location: brentwood
Posts: 8
Thanks: 0
Thanked 1 Time in 1 Post
Default smokey and running rough

helllo i have a cdti that was running ok then started to run as if it was running on two cylinders and smoking ,it would take 20 seconds to start gradually sounding like it would run then it would kick in and smoke so bad that i couldnt risk driving it to the mechanic.the smoke is black in colour,i was told it could be injectors so i pulled the electrical connector off each in turn and found that two seemed to be off so swapped them and still the same,i cant think of anything else that would make it run so rough,ive ordered a pcv filter but cant see that making the difference,the car doesnt seem to be serviced recently looking at the state of the air filter .sorry for the essay
davidson476 is offline   Reply With Quote
Old 26th January 2020, 17:54   #2
Mike Noc
This is my second home
 
Mike Noc's Avatar
 
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4.

Join Date: Jul 2009
Location: Hampshire
Posts: 11,531
Thanks: 3,470
Thanked 3,119 Times in 2,247 Posts
Default

Have a look at the EGR valve - sounds like it might be sticking open.


If you want to rule out the PCV then take the top off it and run the car up - it should idle fine with it removed.
Mike Noc is offline   Reply With Quote
Old 27th January 2020, 19:34   #3
davidson476
Newbie
 
mgzt

Join Date: Nov 2015
Location: brentwood
Posts: 8
Thanks: 0
Thanked 1 Time in 1 Post
Default

thanks for your help
davidson476 is offline   Reply With Quote
Old 27th January 2020, 19:50   #4
marinabrian
 
marinabrian's Avatar
 
MG ZT

Join Date: Jan 2011
Location: Newcastle Upon Tyne
Posts: 20,151
Thanks: 3,565
Thanked 10,837 Times in 5,718 Posts
Default

Also make sure the ECM isn't swimming as this can definitely lead to injector load drop problems

Brian
marinabrian is offline   Reply With Quote
Old 29th January 2020, 19:40   #5
davidson476
Newbie
 
mgzt

Join Date: Nov 2015
Location: brentwood
Posts: 8
Thanks: 0
Thanked 1 Time in 1 Post
Default

had a quick look seems to be dry in there but was only a quick look going to check a few things out the weekend see if i cant sort it it one way or the other thanks for the info.
davidson476 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 14:27.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright © 2006-2023, The Rover 75 & MG ZT Owners Club Ltd