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[AndySnapper]

I have been looking for an official copy of the workshop manual fro my (mini-facelift) 1998 Omega Elite 2.5TD Auto Estate.

Found this link to some CDs and wonder if anyone here has purchased them and found them useful (or otherwise)?

<Link removed - sorry>

I'm struggling with the wiring loom at the moment as part of the dreaded warm starting problems with this engine 

Bought one of the 'Hotfix' solutions which involves connecting just 4 wires. The instructions were incorrect about the earth colour and I am wondering if the engine temp sensor colour (blue/grey) is also wrong in the instructions. My Haynes manual doesn't cover the diesel engines and the people I bought the hotfix from have been less than helpful 

Advice welcomed!

Cheers!

Andy

[woodoo]

Engine temperature sensor wire (ETS) colours: grey/blue and brown/green. Grey/blue is ETS signal wire for ECU.

[AndySnapper]

Thanks for that!

Sounds like I may have the right one then. It is a very thin wire compared to others though. The hotfix kit uses bullet connectors to break into this wire. They look too big for such a thin cable but I have split and joined as instructed.

Nothing is working with regards to the so called hotfix (glowplug light will not illuminate when engine warm). The engine is still a pig to re-start when hot  .

It could be the bullet and scotchlock connectors are not sound or just that the unit is faulty. Right now I don't know which 

Andy

[woodoo]

Grey/blue means wire must be grey with blue line on it, so make sure you got the correct wire. Also could you give link with your hotfix product. And have you checked glowplugs with tester? You must disconnect wires from glowplugs and check resistance. Glowplugs resistance value Should be around 5 Ω. http://www.ngk-dpower.com/index.php?id=31&L=2
Injectors may also cause poor starting.

[Kevin Wood]

I've removed the link as I suspect they are selling ripped off Vauxhall software, and we can't allow discussion of that - sorry. You best bet is probably a Haynes manual - can't go wrong with them going for a fiver or so on Ebay.

[AndySnapper]

Grey/blue means wire must be grey with blue line on it, so make sure you got the correct wire. Also could you give link with your hotfix product. And have you checked glowplugs with tester? You must disconnect wires from glowplugs and check resistance. Glowplugs resistance value Should be around 5 Ω. http://www.ngk-dpower.com/index.php?id=31&L=2
Injectors may also cause poor starting.

Ah! That's useful! To be absolutely honest, this wire is so thin it is hard to tell whether it is a grey one with a blue line or vice versa :-(

The hotfix product is here: http://www.tawpark4x4.com/instructions/omega_hotfix.htm

I haven't checked the glowplugs as they were all replaced less than 6 months ago in an effort to solve the warm start problem (made no difference at all of course). My Vauxhall (Main Dealer) garage has replaced the leak off pipes (that seemed to improve things temporarily) but all benefits now lost and back to the usual problem. Had the leak-off pipes checked again and all ok.

After having (and enjoying) the car from new, I am now at the point of thinking enough is enough and I am throwing good money after bad all the time. This last fandango with the Taw Park hotfix, is similarly depressing.

If all else fails, I suppose I will have to pay more to an auto electrician to install this box for me again. If that doesn't cure it, my love affair with the car has had its day and it will be time to move on. 

Glad I didn't waste more money on those 'dodgy' workshop CDs so thanks for that.

Andy

[AndySnapper]

I've removed the link as I suspect they are selling ripped off Vauxhall software, and we can't allow discussion of that - sorry. You best bet is probably a Haynes manual - can't go wrong with them going for a fiver or so on Ebay.

I think he means the link to the hotfix product and not the manuals Kevin.

[woodoo]

It is quite easy to test if it works. You just need simple 12V bulb with couple wires. Connect one bulbs contact to battery negative pole or engine block, no difference. Connect another bulbs contact to glowplugs wire. Make sure you didn't made short circuit between bulbs contacts or wiring. Now switch ignition ON, and if bulb lights that means your hotfix system works and there are nothing wrong with it, you got different problem (injectors, low compression....). If there are no light on bulb that means you got problems with your hotfix or wiring.

[woodoo]

Ah! That's useful! To be absolutely honest, this wire is so thin it is hard to tell whether it is a grey one with a blue line or vice versa :-(

The hotfix product is here: http://www.tawpark4x4.com/instructions/omega_hotfix.htm

Also i noticed that wiring colors in this link is wrong. Thats the correct vauxhall colors of wiring:
Brown - battery negative
Black - ignition ON 12V
Red/white (on glow plug relay) - battery positive 12V (permanent)!!!

If you connected Hotfix "ignition ON" wire to Red/white then it won't work, you should reconnect it to black wire on ECU!

[Shackeng]

PM sent.

[AndySnapper]

Also i noticed that wiring colors in this link is wrong. Thats the correct vauxhall colors of wiring:
Brown - battery negative
Black - ignition ON 12V
Red/white (on glow plug relay) - battery positive 12V (permanent)!!!

If you connected Hotfix "ignition ON" wire to Red/white then it won't work, you should reconnect it to black wire on ECU!
[/quote]

That's exactly what I have done (following the instructions). I can identify current in the metal bridges on the scotchloks when the ignition is on but nothing at the hotfix end. When the ignition is switched off, there is no power to the scothlok bridges either. There is also a red led in the hotfix unit which I have no idea as to whether it should be illuminated or not.

I will try reconnecting to a black ECU wire and see if that works. I may also have the wrong temp sensor connection by the sounds of it :-(

Thanks!

Andy

[woodoo]

That red led should illuminate after you switch ignition On and stay on for few seconds (I think  ). If i understood correctly, that hotfix is a simple NE555 timer with resistor, when you switch ignition on it cheats ECU by sending wrong engine temperature signal. After few seconds it just disconnects from you temperature sensor and Led should go off. Thats only my guess, i may be wrong. Anyway check your wiring, because your link has wrong instructions. Black wire is "Ignition ON" on your  Vauxhall 

Just found that it can be black/grey near ECU, because it has connector before ECU and it changes from black to black/grey. It is connected to 45 pin on ECU plug.

[AndySnapper]

Thanks woodoo

Will try your suggestion tomorrow (ugh! I mean later today :-)

The combination of red/white and brown I am using at the moment does appear to be an ignition switched supply as it is only live when the ignition is on (not permanently). I don't have much confidence in the scotchlok connectors to be honest. Will play around again though.

I appreciate your help - cheers!

Andy

[woodoo]

Yep actually you are right  Just checked again and found that red/white is live only when ignition is on, it is controlled by relay, didn't noticed that yesterday, sorry. So it should work with brown and red/white connected. Anyway I suggest you to check voltage on glowplugs, they should get 12V instantly after you switch ignition on. The most simple way to do that is bulb test, i mentioned it before.

[AndySnapper]

Ah! That's good then - I was a bit worried when you said that but as one part of the instuctions from Taw Park were wrong, the rest is suspect as well.

As it turns out my wife has gone off in the car so I can't try anything at the moment 

It is also dreadful weather outside so more testing will have to put off a day at least :-)

Thanks again for your replies.

Andy