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Author Topic: Non revving 2.5td  (Read 2050 times)

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maceanruig

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Non revving 2.5td
« on: 29 September 2007, 16:34:43 »
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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Re: Non revving 2.5td
« Reply #1 on: 29 September 2007, 16:43:11 »
Quote
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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Re: Non revving 2.5td
« Reply #2 on: 29 September 2007, 16:49:02 »
Quote
Quote
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 on: 29 September 2007, 16:53:51 »
Quote
Quote
Quote
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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Re: Non revving 2.5td
« Reply #4 on: 29 September 2007, 16:58:52 »
Quote
Quote
Quote
Quote
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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TheBoy

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Re: Non revving 2.5td
« Reply #5 on: 29 September 2007, 16:59:29 »
Is it smoking a lot either at idle, or when booting it?
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Marks DTM Calib

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Re: Non revving 2.5td
« Reply #6 on: 29 September 2007, 17:08:33 »
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

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Re: Non revving 2.5td
« Reply #7 on: 29 September 2007, 18:09:11 »
Quote
Is it smoking a lot either at idle, or when booting it?
No
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TheBoy

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Re: Non revving 2.5td
« Reply #8 on: 29 September 2007, 19:39:19 »
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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Re: Non revving 2.5td
« Reply #9 on: 30 September 2007, 10:32:09 »
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 on: 30 September 2007, 11:26:55 »
Quote
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

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Re: Non revving 2.5td
« Reply #11 on: 30 September 2007, 18:01:25 »
So you have checked all the inlet piping then?
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Omegatoy

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Re: Non revving 2.5td
« Reply #12 on: 30 September 2007, 20:07:38 »
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 on: 01 October 2007, 12:59:01 »
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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

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Re: Non revving 2.5td
« Reply #14 on: 01 October 2007, 13:00:45 »
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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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