Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: shanjon on 03 May 2008, 19:03:48

Title: strange one
Post by: shanjon on 03 May 2008, 19:03:48
today i drove to the in-laws , ten mins later i go to leave and the miggy would not start, turning over lovely but would not start, so i did the paper clip test all i got was a code 31 and a code 12 now i know code 31 was only there because car was not running,
now the strange part there was a wire trapped in my cam cover (now i know why it still leaks LOL ) anyway i disconnected it and got the wire out, so i did paperclip test and only got the two codes again so i thought i may get a different code if i crank it and guess what the car started and only got code 12, i connected the sensor back up and thought all was ok yet five mins later went to go home and it would not start again so disconnected the wire again and it started any ideas
Title: Re: strange one
Post by: Dazzler on 03 May 2008, 19:18:17
Damaged cam sensor wire :-/

What codes do you get with engine running????
Title: Re: strange one
Post by: shanjon on 03 May 2008, 19:22:58
definitely not cam sensor wire, the wire in question seems to dissapear downwards, there are no codes when engine running
Title: Re: strange one
Post by: Marks DTM Calib on 03 May 2008, 20:09:44
Start, get it hot and rev it....does the fault light come on.....sounds like the knock sensor.
Title: Re: strange one
Post by: shanjon on 03 May 2008, 20:19:50
no mate no eml
i will go and get a pic of wire
Title: Re: strange one
Post by: markey mark on 03 May 2008, 20:58:03
does sound like knock sensor wire to me !!  :(
Title: Re: strange one
Post by: shanjon on 03 May 2008, 20:58:05
the wire in question dissapears down between the back of the cam cover next to the water pipe
(http://i288.photobucket.com/albums/ll188/shanjon1/02062008011.jpg)
Title: Re: strange one
Post by: markey mark on 03 May 2008, 21:00:24
that damaged wire is knock sensor mate will knock back your ing timing and hamper perfomance ! but you should get eml !! try getting it up to temp and rev it hard and see if eml comes on ! :y
Title: Re: strange one
Post by: shanjon on 03 May 2008, 21:05:08
Quote
that damaged wire is knock sensor mate will knock back your ing timing and hamper perfomance ! but you should get eml !! try getting it up to temp and rev it hard and see if eml comes on ! :y
but the car will only start when i disconnect it is this about right and im not getting eml even with it disconected
Title: Re: strange one
Post by: shanjon on 03 May 2008, 21:06:10
i need to go to shop in a minute i will try it once it is up to temp
Title: Re: strange one
Post by: markey mark on 03 May 2008, 21:08:02
Quote
Quote
that damaged wire is knock sensor mate will knock back your ing timing and hamper perfomance ! but you should get eml !! try getting it up to temp and rev it hard and see if eml comes on ! :y
but the car will only start when i disconnect it is this about right and im not getting eml even with it disconected

yes if you are getting a dead short across the wires and by looking at it its pretty fubared  :( should have one in my box of spares if you need one fella  :y
Title: Re: strange one
Post by: Marks DTM Calib on 03 May 2008, 21:10:23
I suspect that its a dead short and affecting other sensors which share the same LT supply...
Title: Re: strange one
Post by: shanjon on 03 May 2008, 21:15:30
silly question mate but would this cause poor starting or do you think it is purely coincidence i have found this
Title: Re: strange one
Post by: Marks DTM Calib on 03 May 2008, 21:26:26
Quote
silly question mate but would this cause poor starting or do you think it is purely coincidence i have found this

The LT supply is used by quite a few sensors......short is out and you could get all sorts of problems!
Title: Re: strange one
Post by: shanjon on 03 May 2008, 21:28:25
i will try revving it in a minute when i go to the shop to see if i get eml
Title: Re: strange one
Post by: Marks DTM Calib on 03 May 2008, 21:30:37
Right, I just checked.

The LT supply connects to:

Knock sensor screens and sensor.
Air temp sensor
Coolant temp sensor
EGR valve
Throttle pot
MAF

No wonder it wont start!
Title: Re: strange one
Post by: shanjon on 03 May 2008, 21:55:38
hi guys i got it up to operating temp and gave it a rev to 6000rpm but got no eml,
Title: Re: strange one
Post by: shanjon on 03 May 2008, 21:57:49
Quote
Right, I just checked.

The LT supply connects to:

Knock sensor screens and sensor.
Air temp sensor
Coolant temp sensor
EGR valve
Throttle pot
MAF

No wonder it wont start!
a dead short it is then by the looks of it
Title: Re: strange one
Post by: Marks DTM Calib on 03 May 2008, 22:00:21
The LT sits on the screen of the knock sensor....so I am not surprised.

Might be worth checking the damage to see if you can seperate the wires out and get rid of the short....or remove the damaged section and re-join it.
Title: Re: strange one
Post by: shanjon on 03 May 2008, 22:01:00
the more i look the more i find wrong with the car lol, the list is getting longer and longer
Title: Re: strange one
Post by: cem_devecioglu on 03 May 2008, 22:13:14
Quote
the more i look the more i find wrong with the car lol, the list is getting longer and longer

usually!! dont go deep..
Title: Re: strange one
Post by: shanjon on 03 May 2008, 22:20:23
Quote
The LT sits on the screen of the knock sensor....so I am not surprised.

Might be worth checking the damage to see if you can seperate the wires out and get rid of the short....or remove the damaged section and re-join it.[/quote]
i will have a look tomorrow and report back, thanks for all of the advice guys