Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > Diesel Engines

Notices

Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines.

Information
  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and Plus.net users. Forum owners such as us are finding that AOL, Yahoo and Plus.net are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

help tdi smoking

Views : 2125

Replies : 14

Users Viewing This Thread :  

Reply
 
Thread Tools Display Modes
Old Oct 13th, 2007, 15:14   #1
cymru
New Member
 

Last Online: Jun 15th, 2009 13:29
Join Date: Jul 2007
Location: holyhead
Default help tdi smoking

ive had a look around the forum and found some posts about smoking tdi's and it seemed to be down to timing not to sure if thats the case with mine.

my 141k 1998 v70 tdi smokes bad and i mean bad (cant see the cars behind me)when i put my foot down
and if i havnt put my foot down for some time heavy black soot is left on the road as on the tdi's the exhaust point down to the road..
please please help.
what are the first steps to finding out the problem.
ie got a filter kit and oil at the ready...
many thanks
cymru is offline   Reply With Quote
Old Oct 13th, 2007, 17:08   #2
Gazmo
Junior Member
 

Last Online: Dec 4th, 2009 20:31
Join Date: Oct 2007
Location: Kettering
Default

Ive had a similar problem with my 97 v70 tdi, when i bought it there was no recent service history the engine oil was like black water so i stuck some comma diesel oil flush in the engine and drove it for 40 mile then did an oil and filter change and found there was 7 1/2 litres of oil in the engine, ive used comma eurodiesel semi synthetic and this seems to have cured the problem along with a fuel and air filter change,although i still get a puff of black smoke when under hard acceleration,ive just stuck some wynns supercharge for oil in today and this has also had the benefit of quieting the engine down
Gazmo is offline   Reply With Quote
Old Oct 13th, 2007, 17:36   #3
cymru
New Member
 

Last Online: Jun 15th, 2009 13:29
Join Date: Jul 2007
Location: holyhead
Default

thanks,
yep think the first step oil and filter kit and see what happens..
cymru is offline   Reply With Quote
Old Oct 13th, 2007, 20:19   #4
outnumbered
Lunatic from Wakefield
 
outnumbered's Avatar
 

Last Online: Apr 16th, 2023 07:33
Join Date: Dec 2004
Location: wakefield
Default

Quote:
Originally Posted by cymru View Post
thanks,
yep think the first step oil and filter kit and see what happens..
hi
as has been said do the oil,fuel filter and air filter first. also clean out all the intercooler pipes, these will have oil in them, check and clean the intercooler itself, check all vac pipes for wear , and last but not least the pump timeing may need adjustment, this can only be done via a scan tool.
hope that helps
mike
850 tdi p box
outnumbered is offline   Reply With Quote
Old Oct 13th, 2007, 20:32   #5
Clan
Experienced Member
 
Clan's Avatar
 

Last Online: Today 14:09
Join Date: Jun 2007
Location: L/H side
Default

Black smoke is unburnt fuel i cant see how the oil can affect that whatever state it is in . The timing will always be correct as long as the Engine managment light is off , It is controled by the Engine Control Unit . Yes it can be checked with a Volvo scan tool , but thats just to get the basic position that the computer can work with .. it will advance and retard correctly from there . The Light will come on if the computer cant get the injection timing it needs due to adjustment parameters being out of tolerance ...
__________________
My comments are only based on my opinions and vast experience .
Clan is online now   Reply With Quote
Old Oct 13th, 2007, 20:54   #6
jor
VOC 20573
 
jor's Avatar
 

Last Online: Jul 10th, 2023 23:14
Join Date: Mar 2007
Location: wembley
Default

So if changing oil and filters won't help Clan and timing isn't out, what would you suggest?

JOHN
jor is offline   Reply With Quote
Old Oct 13th, 2007, 21:26   #7
Clan
Experienced Member
 
Clan's Avatar
 

Last Online: Today 14:09
Join Date: Jun 2007
Location: L/H side
Default

Quote:
Originally Posted by jor View Post
So if changing oil and filters won't help Clan and timing isn't out, what would you suggest?

JOHN

If these engines are driven gently through towm a lot and never driven over 3000 rpm they tend to soot up . The cure is a good drive with lots of full throttle accelleration up to the rev cut out in 2nd and 3rd gears you will find the smoke gets less and less with each burst of accelleration unti it is very reasonable or even non existant . It is a good idea to do this before the MOT as well . If this doesnt reduce the smoke then it is possible the injectors need attention if high mileage ..or perhaps the camshaft timing is out it needs a special plate to set it up if the cam pulley is ever removed .
a VERY restricted air filter may cause black smoke too ...
__________________
My comments are only based on my opinions and vast experience .
Clan is online now   Reply With Quote
Old Oct 13th, 2007, 21:58   #8
jor
VOC 20573
 
jor's Avatar
 

Last Online: Jul 10th, 2023 23:14
Join Date: Mar 2007
Location: wembley
Default

I hope it's not injector replacement time for the lad, I think they all have to be replaced at the same time at some horrendous expense. It's not going to do any harm to clean the current set either with proprietary stuff, or the cheaper method of removing the fuel filter, emptying it and filling with transmission oil (non-synthetic). You can then add a few hundred mls every couple of fills, which serves as cleaner plus pump lubricant.

john
jor is offline   Reply With Quote
Old Oct 14th, 2007, 11:10   #9
cymru
New Member
 

Last Online: Jun 15th, 2009 13:29
Join Date: Jul 2007
Location: holyhead
Default

Quote:
Originally Posted by Clan View Post
If these engines are driven gently through towm a lot and never driven over 3000 rpm they tend to soot up . The cure is a good drive with lots of full throttle accelleration up to the rev cut out in 2nd and 3rd gears you will find the smoke gets less and less with each burst of accelleration unti it is very reasonable or even non existant . It is a good idea to do this before the MOT as well . If this doesnt reduce the smoke then it is possible the injectors need attention if high mileage ..or perhaps the camshaft timing is out it needs a special plate to set it up if the cam pulley is ever removed .
a VERY restricted air filter may cause black smoke too ...
Thanks for all the info,
ive tried accelleration method and it doest clear, but its not as bad,
and no sooner i stop the car and start up again it starts again, what i was worried about it if i dont put my foot down for a few days is the amount of soot on the road if i put my foot down in 1 gear 2/3..
cymru is offline   Reply With Quote
Old Oct 14th, 2007, 20:30   #10
outnumbered
Lunatic from Wakefield
 
outnumbered's Avatar
 

Last Online: Apr 16th, 2023 07:33
Join Date: Dec 2004
Location: wakefield
Default

Quote:
Originally Posted by Clan View Post
Black smoke is unburnt fuel i cant see how the oil can affect that whatever state it is in . The timing will always be correct as long as the Engine managment light is off , It is controled by the Engine Control Unit . Yes it can be checked with a Volvo scan tool , but thats just to get the basic position that the computer can work with .. it will advance and retard correctly from there . The Light will come on if the computer cant get the injection timing it needs due to adjustment parameters being out of tolerance ...

interesting comments all cars are different, quote the timing will always be correct as long as the eml is off, wrong, the timing as you no has to be in a set tolerence it can be out of tolerence even without the eml light on, this can cause black smoke. i did a members car which had these symptoms, the pump timing was way out no eml light on adjusted the belt and less smoke. i agree you have to work these engines but the system must be correct first or you will be all day thrashing the backside off it.
mike
850 tdi p box
outnumbered is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 +1. The time now is 14:58.


Powered by vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.