Omega Owners Forum - Omega 2.5 td elite m reg acceleration problems!!

CF

Newbie

Offline

Posts: 14

Omega 2.5 td elite m reg acceleration problems!!
26. Sep 2007 at 20:49

I would welcome some advice with a problem on my rather old 2.5td auto. It is failing to accelerate when I put my foot down. It is rather flat when pulling off and has little throttle response until 5 seconds later when masses of power comes in. There are no warning lights showing.

Firstly, I would like to know of a fault code reader and manual that I could buy that would help check the data stored in the ECU. Secondly has anyone any ideas concerning this problem and its rectification.

Many thanks CF

Back to top

IP Logged

Dazzler Omega Baron Offline Drive it like you stole it...... Posts: 4459 Sutton, Surrey Gender: Drives: AMG C32 estate	Re: Omega 2.5 td elite m reg acceleration problems Reply #1 - 26. Sep 2007 at 20:52 When did it last have all its filters changed????? especially the diesel and air filter.
Back to top	Big jobbies now finished.....Now running on LPG IP Logged

TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: Omega 2.5 td elite m reg acceleration problems Reply #2 - 26. Sep 2007 at 21:25 Check the hose from turbo to intake hasn't gone soft.... Need a good code reader - cheapo tech2 doesn't read it iirc
Back to top	If you are going to kick a car, remember to wear appropriate footwear Any posts are the result of my own views as a member of OOF, which may or may not be the same as my views as part of the Admin Team. IP Logged

IrmscherKris BANNED Offline banned due to bad trader references Posts: 1 Manchester Gender: Drives: Elite TD	Re: Omega 2.5 td elite m reg acceleration problems Reply #3 - 27. Sep 2007 at 00:21 Is it an auto? If so, check the gearbox oil...
Back to top	IP Logged

CF Newbie Offline Posts: 14	Re: Omega 2.5 td elite m reg acceleration problems Reply #4 - 28. Sep 2007 at 21:44 Dazzler wrote on 26. Sep 2007 at 20:52: When did it last have all its filters changed????? especially the diesel and air filter. Thanks but all filters renewed as per service schedule - less then 1k miles ago.
Back to top	IP Logged

CF Newbie Offline Posts: 14	Re: Omega 2.5 td elite m reg acceleration problems Reply #5 - 28. Sep 2007 at 21:48 IrmscherKris wrote on 27. Sep 2007 at 00:21: Is it an auto? If so, check the gearbox oil... Thanks - Have checked the oil - that's OK. No change to the problem so its an engine fault problem.
Back to top	IP Logged

Dazzler Omega Baron Offline Drive it like you stole it...... Posts: 4459 Sutton, Surrey Gender: Drives: AMG C32 estate	Re: Omega 2.5 td elite m reg acceleration problems Reply #6 - 28. Sep 2007 at 22:35 How much fuel have you got in the tank?????
Back to top	Big jobbies now finished.....Now running on LPG IP Logged

CF Newbie Offline Posts: 14	Re: Omega 2.5 td elite m reg acceleration problems Reply #7 - 29. Sep 2007 at 07:43 Fuel just over half full!
Back to top	IP Logged

TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: Omega 2.5 td elite m reg acceleration problems Reply #8 - 29. Sep 2007 at 10:19 may be worth bleeding it, but I'd expect it to idle erratic if air in there....
Back to top	If you are going to kick a car, remember to wear appropriate footwear Any posts are the result of my own views as a member of OOF, which may or may not be the same as my views as part of the Admin Team. IP Logged

Omegatoy

Omega Baron

Offline

Posts: 3030
sunny spain!!!

Drives: Omega TD chipped of course,

Re: Omega 2.5 td elite m reg acceleration problems
Reply #9 - 30. Sep 2007 at 20:14

not quite sure of the problem here, if you have masses of power after 5 seconds or so then would guess the turbo has kicked in, below about 1800 rpm they are slightly flat, although not to bad should be a gradual urge building with an auto, from your description it sounds lke it all of a suden shoots off? more info please?

Back to top

http://showoffyourcar.com/galleries.asp?carid=1897
as was

http://showoffyourcar.com/galleries.asp?carid=1263
http://uk.youtube.com/watch?v=8z2SMuv8GhA

IP Logged

CF

Newbie

Offline

Posts: 14

Re: Omega 2.5 td elite m reg acceleration problems
Reply #10 - 01. Oct 2007 at 19:15

Hi

After hours of looking at wiring diagrams and testing bits The problem was found to be the air temperature sensor in the plenum chamber. It was caked in oil and grease and so unable to function properly. No warning lights or fault codes showed because the problem was not the failure of the sensor.

Cleaning inside the plenum chamber is a real task should anyone feel tempted - it fouls the bulkhead and so is an impossible task without removing the rearmost four studs. I now understand why this particular task has never been completed previously.

Back to top

IP Logged

TheBoy

Administrator

Offline

TBE has an MOT!

Posts: 64817
Brackley, Northants
Gender: male

Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10

Re: Omega 2.5 td elite m reg acceleration problems
Reply #11 - 01. Oct 2007 at 21:53

CF wrote on 01. Oct 2007 at 19:15:

Hi

After hours of looking at wiring diagrams and testing bits The problem was found to be the air temperature sensor in the plenum chamber. It was caked in oil and grease and so unable to function properly. No warning lights or fault codes showed because the problem was not the failure of the sensor.

Cleaning inside the plenum chamber is a real task should anyone feel tempted - it fouls the bulkhead and so is an impossible task without removing the rearmost four studs. I now understand why this particular task has never been completed previously.

There is a knack to getting these off. I can do it very quickly, due to excessive practice Roll Eyes

Back to top

If you are going to kick a car, remember to wear appropriate footwear
Any posts are the result of my own views as a member of OOF, which may or may not be the same as my views as part of the Admin Team.

IP Logged

This is the old site. Please use the new site.

This is the old site. Please use the new site.

www.omegaowners.com/forum/index.php.

This is the old site. Please use the new site.

	Welcome, Guest. Please Login