Omega Owners Forum - Non revving 2.5td

maceanruig

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Near Kirriemuir, Angus,
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Non revving 2.5td
29. Sep 2007 at 16:34

Hi,
I've diesel magiced it, as per the boy, I've checked the fuel filter for water - none. I've had it diagnosed - nothing showing. Looking under the bonnet I notice an electrical connection to the battery, blue that runs to a 15 amp fuse near a box with ZF on it. I'll replacethat soon as I get a connector. Also looking in the fuse box thingy under the bonnet I notice that no 1 relay is missing - maybe its supposed to be. Does anyone know what its for? A stupid question - of course somebody knows. It goes into a purplish connection. The car is a 96 2.5 td elite estate.
Thanks, john

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TheBoy

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TBE has an MOT!

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

Re: Non revving 2.5td
Reply #1 - 29. Sep 2007 at 16:43

maceanruig wrote on 29. Sep 2007 at 16:34:

Hi,
I've diesel magiced it, as per the boy, I've checked the fuel filter for water - none. I've had it diagnosed - nothing showing. Looking under the bonnet I notice an electrical connection to the battery, blue that runs to a 15 amp fuse near a box with ZF on it. I'll replacethat soon as I get a connector. Also looking in the fuse box thingy under the bonnet I notice that no 1 relay is missing - maybe its supposed to be. Does anyone know what its for? A stupid question - of course somebody knows. It goes into a purplish connection. The car is a 96 2.5 td elite estate.
Thanks, john

As for missing relay, see relay box layout posts in Tecnical Information section.

Is the pipe from the bottom of the inlet to the boost pressure switch OK?

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maceanruig

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Near Kirriemuir, Angus,
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Re: Non revving 2.5td
Reply #2 - 29. Sep 2007 at 16:49

TheBoy wrote on 29. Sep 2007 at 16:43:

maceanruig wrote on 29. Sep 2007 at 16:34:

Hi,
I've diesel magiced it, as per the boy, I've checked the fuel filter for water - none. I've had it diagnosed - nothing showing. Looking under the bonnet I notice an electrical connection to the battery, blue that runs to a 15 amp fuse near a box with ZF on it. I'll replacethat soon as I get a connector. Also looking in the fuse box thingy under the bonnet I notice that no 1 relay is missing - maybe its supposed to be. Does anyone know what its for? A stupid question - of course somebody knows. It goes into a purplish connection. The car is a 96 2.5 td elite estate.
Thanks, john

As for missing relay, see relay box layout posts in Tecnical Information section.

Is the pipe from the bottom of the inlet to the boost pressure switch OK?

Yes i think the guy who did the diagnosis fouind a propblem with this but sorted it and made no difference.

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maceanruig

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Re: Non revving 2.5td
Reply #3 - 29. Sep 2007 at 16:53

maceanruig wrote on 29. Sep 2007 at 16:49:

TheBoy wrote on 29. Sep 2007 at 16:43:

maceanruig wrote on 29. Sep 2007 at 16:34:

Hi,
I've diesel magiced it, as per the boy, I've checked the fuel filter for water - none. I've had it diagnosed - nothing showing. Looking under the bonnet I notice an electrical connection to the battery, blue that runs to a 15 amp fuse near a box with ZF on it. I'll replacethat soon as I get a connector. Also looking in the fuse box thingy under the bonnet I notice that no 1 relay is missing - maybe its supposed to be. Does anyone know what its for? A stupid question - of course somebody knows. It goes into a purplish connection. The car is a 96 2.5 td elite estate.
Thanks, john

As for missing relay, see relay box layout posts in Tecnical Information section.

Is the pipe from the bottom of the inlet to the boost pressure switch OK?

Yes i think the guy who did the diagnosis fouind a propblem with this but sorted it and made no difference.

According to Mrk DTM Calib its a test connector.

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TheBoy

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TBE has an MOT!

Posts: 64817
Brackley, Northants
Gender: male

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

Re: Non revving 2.5td
Reply #4 - 29. Sep 2007 at 16:58

maceanruig wrote on 29. Sep 2007 at 16:53:

maceanruig wrote on 29. Sep 2007 at 16:49:

TheBoy wrote on 29. Sep 2007 at 16:43:

maceanruig wrote on 29. Sep 2007 at 16:34:

Hi,
I've diesel magiced it, as per the boy, I've checked the fuel filter for water - none. I've had it diagnosed - nothing showing. Looking under the bonnet I notice an electrical connection to the battery, blue that runs to a 15 amp fuse near a box with ZF on it. I'll replacethat soon as I get a connector. Also looking in the fuse box thingy under the bonnet I notice that no 1 relay is missing - maybe its supposed to be. Does anyone know what its for? A stupid question - of course somebody knows. It goes into a purplish connection. The car is a 96 2.5 td elite estate.
Thanks, john

As for missing relay, see relay box layout posts in Tecnical Information section.

Is the pipe from the bottom of the inlet to the boost pressure switch OK?

Yes i think the guy who did the diagnosis fouind a propblem with this but sorted it and made no difference.

According to Mrk DTM Calib its a test connector.

Nothing plugs in to that then

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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.

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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: Non revving 2.5td Reply #5 - 29. Sep 2007 at 16:59 Is it smoking a lot either at idle, or when booting it?
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Non revving 2.5td Reply #6 - 29. Sep 2007 at 17:08 Check the inlet track from the airfilter, to the turbo, through to the intercooler and into the inlet....make sure that none of the pipes have come off.
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maceanruig Newbie Offline Posts: 12 Near Kirriemuir, Angus, Gender:	Re: Non revving 2.5td Reply #7 - 29. Sep 2007 at 18:09 TheBoy wrote on 29. Sep 2007 at 16:59: Is it smoking a lot either at idle, or when booting it? No
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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: Non revving 2.5td Reply #8 - 29. Sep 2007 at 19:39 Hmmm, out of ideas at the moment. Hopefully one of the diesel experts can suggest something...
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CF

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Posts: 14

Re: Non revving 2.5td
Reply #9 - 30. Sep 2007 at 10:32

Hi
What year is the car? I seem to have the same problem with my 2.5td at the moment but my car is a 95 vintage. Mine does not appear to be maturing gracefully!!!

Try looking under the pellum ( not sure of spelling) chamber - the large aluminium air intake that sits on the RHS of the engine. Between the underside of the second and third air intakes there is a sensor - unclip the electrical socket and try the engine again to see if that makes a difference. Leave the sensor in the casting. I believe it is an air intake temperature sensor. Let me know if there is any change - it certainly made a difference to mine!!!

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maceanruig

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Re: Non revving 2.5td
Reply #10 - 30. Sep 2007 at 11:26

CF wrote on 30. Sep 2007 at 10:32:

Hi
What year is the car? I seem to have the same problem with my 2.5td at the moment but my car is a 95 vintage. Mine does not appear to be maturing gracefully!!!

Try looking under the pellum ( not sure of spelling) chamber - the large aluminium air intake that sits on the RHS of the engine. Between the underside of the second and third air intakes there is a sensor - unclip the electrical socket and try the engine again to see if that makes a difference. Leave the sensor in the casting. I believe it is an air intake temperature sensor. Let me know if there is any change - it certainly made a difference to mine!!!

Hi CF Mine is a 96 so I'll have a look. I think the word you're looking for is plenum which broadly is a space to allow air circulation. I'll let you know.

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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Non revving 2.5td Reply #11 - 30. Sep 2007 at 18:01 So you have checked all the inlet piping then?
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Omegatoy Omega Baron Offline Posts: 3030 sunny spain!!! Drives: Omega TD chipped of course,	Re: Non revving 2.5td Reply #12 - 30. Sep 2007 at 20:07 well apart from the title anyone know what it is or isnt doing? does it tickover but not rev when pedal pressed? does it not pull under load? have i missed somthing, or what??? Onegatoy
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maceanruig

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Re: Non revving 2.5td
Reply #13 - 01. Oct 2007 at 12:59

Omegatoy wrote on 30. Sep 2007 at 20:07:

well apart from the title anyone know what it is or isnt doing? does it tickover but not rev when pedal pressed? does it not pull under load? have i missed somthing, or what???
Onegatoy

Hi, sorry I had an earlier post - it revs up to about 3,500 -3,700 when not under load and to about 3,000 - 3,100 when driving gets up to that no bother but won't go any higher - a pain in the arse as the auto box keeps dropping to a lower gear. A previous owner reckoned it may have the wrong fuel pump. I've had it diagnosed and he could find no fault.

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maceanruig Newbie Offline Posts: 12 Near Kirriemuir, Angus, Gender:	Re: Non revving 2.5td Reply #14 - 01. Oct 2007 at 13:00 Marks DTM Calib wrote on 30. Sep 2007 at 18:01: So you have checked all the inlet piping then? There's no many bits of plumbing! Wouldn't the diagnostic chap have noticed loose or missing pipes - or am I just being naive?
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