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Omega Help Area => Omega General Help => Topic started by: stuvaux on 01 February 2012, 17:27:24

Title: Running rough
Post by: stuvaux on 01 February 2012, 17:27:24
Hi
Car cut out and the 30 amp fuse under th bonnet blew
It restarted and is now running very rough and EML is on
Codes 48 and 81 are now showing
Is this likely to be coil pack as I am thinking?

Stu
Title: Re: Running rough
Post by: RobG on 01 February 2012, 17:48:48
Quote from: stuvaux on 01 February 2012, 17:27:24
Hi
Car cut out and the 30 amp fuse under th bonnet blew
It restarted and is now running very rough and EML is on
Codes 48 and 81 are now showing
Is this likely to be coil pack as I am thinking?

Stu
Don`t know what engine you`ve got, but check wiring to #1 injector
Title: Re: Running rough
Post by: stuvaux on 01 February 2012, 18:13:16
Apologies, thought it was still on profile pic
The car is a 2.5V6, 1999

I originally thought it may be the kickdown switch as this caused the 30 amp fuse to blow a number of years ago. I took apart switch and cleaned it the same as last time and car was fine for one day.

When it first happened yesterday, the car would not restart when I replaced the fuse, it just kept blowing the fuse. However, when I removed accelerator cable and kickdown switch, the car ran fine so I assumed that was the problem.
I have now disconnected the kickdown switch but problem is still there
Title: Re: Running rough
Post by: TheBoy on 01 February 2012, 20:08:15
I'm with RobG, I'd be checking the wiring around injectors and in cable tray for damage.
Title: Re: Running rough
Post by: stuvaux on 02 February 2012, 08:15:08
Okay thanks both
Will let you know how I get on

Stu
Title: Re: Running rough
Post by: stuvaux on 02 February 2012, 18:34:24
I have checked the wiring around injectors and in the cable tray, and all seems ok

Would a problem with the wiring possibly cause the 30 amp (under-bonnet) fuse to blow?
I cannot find any list of things that this fuse protects

Also, there was a small amount of smoke coming from back of engine when I started it today (Coming from roughly central, right at back of engine)

Any more ideas anyone?

Thanks in advance
Title: Re: Running rough
Post by: RobG on 02 February 2012, 18:48:56
Which fuse
(http://images.omegaowners.com/images/techinfo/enginerelaybox/2-4.jpg)
Title: Re: Running rough
Post by: stuvaux on 02 February 2012, 18:57:40
Its the 30 amp fuse in the smaller box (not shown) next to that one in the pic
Title: Re: Running rough
Post by: RobG on 02 February 2012, 19:03:15
Quote from: stuvaux on 02 February 2012, 18:57:40
Its the 30 amp fuse in the smaller box (not shown) next to that one in the pic
Protects the Motronic ECU
Title: Re: Running rough
Post by: stuvaux on 02 February 2012, 20:51:13
Ok thanks.
Also the car runs on lpg and the indicator in the car is no longer working
Does this mean its a problem with the ecu?
Title: Re: Running rough
Post by: stuvaux on 05 February 2012, 15:06:10
I think I have located the problem.

I have had a better chance to look at it today and have stripped off the plenum to give access to the wiring.
 
The plastic coating has melted on some of it, so that would obviously cause the shorting out and blowing of the fuse

Does anyone have any suggestions as to the best way to repair this wiring?
There are about 6 wires in total, which lead to the 2 front left injectors (looking from front of car)
I realise that I may need to replace the injector loom in the future. But is there a way I can temporarily repair it for now?

Thanks
Title: Re: Running rough
Post by: RobG on 05 February 2012, 15:18:21
Quote from: stuvaux on 05 February 2012, 15:06:10
I think I have located the problem.

I have had a better chance to look at it today and have stripped off the plenum to give access to the wiring.
 
The plastic coating has melted on some of it, so that would obviously cause the shorting out and blowing of the fuse

Does anyone have any suggestions as to the best way to repair this wiring?
There are about 6 wires in total, which lead to the 2 front left injectors (looking from front of car)
I realise that I may need to replace the injector loom in the future. But is there a way I can temporarily repair it for now?

Thanks
You could try insulation tape, if that fails I`ve got the V6 loom from where it connects to the plug at the bulkhead to all injectors
Title: Re: Running rough
Post by: stuvaux on 05 February 2012, 15:28:09
It doesn't look too bad to be honest.

Do you think it is likely that the wiring has worn through causing it to short out and blow the fuse? Or could something else have caused the problem and it may just happen again once I've repaired the wiring?
Sorry for all the questions, just hoping that all will be okay once wiring is repaired/replaced

Title: Re: Running rough
Post by: RobG on 05 February 2012, 15:33:13
Quote from: stuvaux on 05 February 2012, 15:28:09
It doesn't look too bad to be honest.

Do you think it is likely that the wiring has worn through causing it to short out and blow the fuse? Or could something else have caused the problem and it may just happen again once I've repaired the wiring?
Sorry for all the questions, just hoping that all will be okay once wiring is repaired/replaced
It`s quite possible as the fault code raised did indicate an electrical problem with one of the injectors
Title: Re: Running rough
Post by: stuvaux on 05 February 2012, 15:48:04
Great thanks Rob

I will let you know how it goes (maybe tomorrow now as I can only work until dark)

Will let you know if I need the injector loom you have too

Thanks
Title: Re: Running rough
Post by: stuvaux on 06 February 2012, 17:01:41
Just to let you know, the car is running fine now

Plenty of insulation tape has sorted it!
Thanks again,

Stu