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Vauxhall X25XE
http://dtaforum.com/viewtopic.php?f=12&t=1498
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Author:  Andy-reid [ Sun May 27, 2018 3:35 pm ]
Post subject:  Vauxhall X25XE

Hi i have bought a S80pro to be fitted to a vauxhall 2.5 v6 it has a firing order of 1-2-3-4-5-6 instead od 1-3-6-2-5-4 i think questions what are the cylinder positions? how do i wire the injectors? individually? and what ign outputs to use

Author:  stevieturbo [ Sun May 27, 2018 3:59 pm ]
Post subject:  Re: Vauxhall X25XE

http://www.dtafast.co.uk/download_files ... iagram.pdf

http://www.dtafast.co.uk/download_files ... Manual.pdf

Author:  Andy-reid [ Mon May 28, 2018 1:18 am ]
Post subject:  Re: Vauxhall X25XE

Hi thanks for a reply but that is the generic diagram with no actual mention of the (odfire) type engine looks like i will just have to try it and see

Author:  stevieturbo [ Mon May 28, 2018 3:10 am ]
Post subject:  Re: Vauxhall X25XE

It isnt a generic diagram. It's a diagram for that ecu, it is very specific, regardless of engine.

Unless you wire it incorrectly and not in firing order as is clearly stated, it would be hard to go wrong.

If the engine also fires at unequal angles within the 720 cycle ( which it probably doesnt ) then you would address that in the software

However.....for an engine to actually have a firing order of 1-2-3-4-5-6......I would be extremely sceptical of that. Because that would truly be odd.

Although just googled....how weird !!

Do they actually identify cylinders as they normally would on a Vee engine ?

Author:  Rob Stevens [ Mon May 28, 2018 3:54 am ]
Post subject:  Re: Vauxhall X25XE

Looking at pictures for this engine it looks to be an even fire engine yet with a v angle of 54deg. Therefore can be run in wasted spark/batch mode. However you have s80 so you can run it sequentially so why not. As for finding the firing order perhaps just work it out by seeing which cylinder is next on compression, probably not so easy with the plug down a hole, but not imposable with a bit of tube screwed in the plug hole and feel with your finger over the end as you rotate the engine.

Author:  Andy-reid [ Mon May 28, 2018 1:23 pm ]
Post subject:  Re: Vauxhall X25XE

stevieturbo wrote:
It isnt a generic diagram. It's a diagram for that ecu, it is very specific, regardless of engine.

Unless you wire it incorrectly and not in firing order as is clearly stated, it would be hard to go wrong.

If the engine also fires at unequal angles within the 720 cycle ( which it probably doesnt ) then you would address that in the software

However.....for an engine to actually have a firing order of 1-2-3-4-5-6......I would be extremely sceptical of that. Because that would truly be odd.

Although just googled....how weird !!

Do they actually identify cylinders as they normally would on a Vee engine ?


i have just looked at the coil and the engine where the leads are located cylinder 1-3-5 on one side 2-4-6 the other but on the wasted spark coil 1&4 share a coil 3&6 and 2&5 which makes no sense to me! i have never done a stand alone on a 6 cylinder

Author:  Anders_Karlsson [ Mon May 28, 2018 2:00 pm ]
Post subject:  Re: Vauxhall X25XE

Dont know if its any help, but the stock engine management has sequential fuel injection and wasted spark.
There is a cam sensor on one of the camshafts.

If its from a rearwheel drive Omega/Carlton it should have the cylinders numbered on one of the plastic valvecovers.

Author:  stevieturbo [ Mon May 28, 2018 3:48 pm ]
Post subject:  Re: Vauxhall X25XE

Andy-reid wrote:
stevieturbo wrote:
It isnt a generic diagram. It's a diagram for that ecu, it is very specific, regardless of engine.

Unless you wire it incorrectly and not in firing order as is clearly stated, it would be hard to go wrong.

If the engine also fires at unequal angles within the 720 cycle ( which it probably doesnt ) then you would address that in the software

However.....for an engine to actually have a firing order of 1-2-3-4-5-6......I would be extremely sceptical of that. Because that would truly be odd.

Although just googled....how weird !!

Do they actually identify cylinders as they normally would on a Vee engine ?


i have just looked at the coil and the engine where the leads are located cylinder 1-3-5 on one side 2-4-6 the other but on the wasted spark coil 1&3 share a coil 4&6 and 2&5 which makes no sense to me! i have never done a stand alone on a 6 cylinder


You say wasted spark.....But you see 3 coils ? 6 leads ?

How many wires going to each coil pack ? It could still be spark per cylinder as opposed to wasted spark. Because what you're describing above doesnt make sense for a wasted spark setup.

Author:  Andy-reid [ Mon May 28, 2018 4:47 pm ]
Post subject:  Re: Vauxhall X25XE

stevieturbo wrote:
Andy-reid wrote:
stevieturbo wrote:
It isnt a generic diagram. It's a diagram for that ecu, it is very specific, regardless of engine.

Unless you wire it incorrectly and not in firing order as is clearly stated, it would be hard to go wrong.

If the engine also fires at unequal angles within the 720 cycle ( which it probably doesnt ) then you would address that in the software

However.....for an engine to actually have a firing order of 1-2-3-4-5-6......I would be extremely sceptical of that. Because that would truly be odd.

Although just googled....how weird !!

Do they actually identify cylinders as they normally would on a Vee engine ?


i have just looked at the coil and the engine where the leads are located cylinder 1-3-5 on one side 2-4-6 the other but on the wasted spark coil 1&3 share a coil 4&6 and 2&5 which makes no sense to me! i have never done a stand alone on a 6 cylinder


You say wasted spark.....But you see 3 coils ? 6 leads ?

How many wires going to each coil pack ? It could still be spark per cylinder as opposed to wasted spark. Because what you're describing above doesnt make sense for a wasted spark setup.


there are 4 wires to 3 twin coils i know you can get coil modules with 3 in each one for each bank that screw directly on top of the cam cover! so that would be sequential as it does have and needs the cam sensor

Author:  Rob Stevens [ Tue May 29, 2018 1:37 am ]
Post subject:  Re: Vauxhall X25XE

So if you have those coils you need to use the first 3 coil drivers from the ecu, that's no1 to 1&3 no2 to 4&6 and no3 to 2&5 and it will run as wasted spark

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