Omega Owners Forum - dianostic problems

thegman007

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dianostic problems
25. Sep 2007 at 12:21

i am having some difficulty in finding a fault with my 96 2.6 cdx, yesterday it was running fine, maybe a bit heavy on the fuel, averaging about 300 miles to £70 petrol, as i went to overtake another vehicle i selected sport mode, and floored it, it revved up and was about to down shift when all of a sudden the engine management light came on and the car shuddered to a hault, like a rev limiter cutting in but at 2500 rpm. the light went of again but the car would not pull past this rev 2500, and had a top speed of 40mph, even in nutral the engine would not rev past this but the management light never re appeared maybe only on the odd occaision. the display on the dash did not indicate any problem and did not indicate safe mode. i finally called out the AA and the guy looked at it and initally thought it was the torque convertir but then realised that it also limited in nutral. he then examined further and thinks that it is the EGR valve stuck full open and over gasing the engine.

i have never heard of this, but he assurred me that this would indeed cause heavy fuel comsumption and a lack of power, have any of you guys had simular and can anyone adivse me on what this could be, was the AA man right do i need a new EGR valve and will i still need to have it plugged in to a dianostic machine? Cry

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Rebel1 Newbie Offline Posts: 15	Re: dianostic problems Reply #1 - 25. Sep 2007 at 13:11 Shouldn't your 96 model be a 2.5 rather than a 2.6?
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Danny Omega Lord Offline BLACK 1.6 BORA SHAPED JETTA!! Posts: 7180 Wigan, Greater Manchester Gender: Drives: 99 1.6 bora, 53 2.6 MV6	Re: dianostic problems Reply #2 - 25. Sep 2007 at 13:14 probably a typo, his profile says 2.5
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Dazzler Omega Baron Offline Drive it like you stole it...... Posts: 4459 Sutton, Surrey Gender: Drives: AMG C32 estate	Re: dianostic problems Reply #3 - 25. Sep 2007 at 13:31 Paperclip test required......
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The Barge Captain Omega Knight Offline Back in the land of the economicaly active Posts: 1827 Bristol Gender: Drives: Saab 95 vector sport 1.9TiD	Re: dianostic problems Reply #4 - 25. Sep 2007 at 14:17 Cam sensor?
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: dianostic problems Reply #5 - 25. Sep 2007 at 14:28 Another stupid diagnosis from a roadside recovery man.... If it idles ok then its not EGR! Read the fault codes as a starter.
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TheBoy

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TBE has an MOT!

Posts: 64817
Brackley, Northants
Gender: male

Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10

Re: dianostic problems
Reply #6 - 25. Sep 2007 at 18:36

thegman007 wrote on 25. Sep 2007 at 12:21:

i am having some difficulty in finding a fault with my 96 2.6 cdx, yesterday it was running fine, maybe a bit heavy on the fuel, averaging about 300 miles to £70 petrol, as i went to overtake another vehicle i selected sport mode, and floored it, it revved up and was about to down shift when all of a sudden the engine management light came on and the car shuddered to a hault, like a rev limiter cutting in but at 2500 rpm. the light went of again but the car would not pull past this rev 2500, and had a top speed of 40mph, even in nutral the engine would not rev past this but the management light never re appeared maybe only on the odd occaision. the display on the dash did not indicate any problem and did not indicate safe mode. i finally called out the AA and the guy looked at it and initally thought it was the torque convertir but then realised that it also limited in nutral. he then examined further and thinks that it is the EGR valve stuck full open and over gasing the engine.

i have never heard of this, but he assurred me that this would indeed cause heavy fuel comsumption and a lack of power, have any of you guys had simular and can anyone adivse me on what this could be, was the AA man right do i need a new EGR valve and will i still need to have it plugged in to a dianostic machine? Cry

Does it idle OK, or are the revs all over the place? EGR would cause it to idle erratic - if stuck fully open, would stall all the time. About 45% egr, iirc, usually causes a stall.

As the EML came on, do a paperclip test (see Maintenence Guides section)

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Any posts are the result of my own views as a member of OOF, which may or may not be the same as my views as part of the Admin Team.

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thegman007

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Re: dianostic problems
Reply #7 - 28. Sep 2007 at 11:36

thanks guys to your prompt response, and yes it was a typo it is a 2.5.
this paperclip test guys what exactly it it and what will it do, you will have to excuse my nievity, i do enjoy the vauxhall range but have limited knowledge in the tech side of it. has anyone else had simular probs like this, if so what was the problem.

guys "and girls" i bow down to you superiour knowledge Thumbs Up!

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thegman007 Newbie Offline Posts: 6 letchworth Gender:	Re: dianostic problems Reply #8 - 28. Sep 2007 at 11:39 the ans to the above question, it idles lumpy, its ok when cold will rev up to about 4000rpm but when it gets hot it goes down to 2000rpm. the eml has only cam on a few times but does not stay on and does not automaticaly come on when the engine struggles
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: dianostic problems Reply #9 - 28. Sep 2007 at 12:19 Have a read of this: How to read fault codes Its easy to do and once you have them, post them up and we can advise further.
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thegman007 Newbie Offline Posts: 6 letchworth Gender:	Re: dianostic problems Reply #10 - 01. Oct 2007 at 11:15 thanks guys for the help, i have done the paperclip test and it gave me 1 flash then 9 flashes code 1 9. it also gave me 1 6, possibly becase the engine was off, what would this fault be on this model, some ahve told me crank shaft sensor, if so is this common, easy to replace ect...
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Entwood

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Quietly Confident

Posts: 13708
North Wiltshire
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Drives: 3.2 Elite (with LPG)

Re: dianostic problems
Reply #11 - 01. Oct 2007 at 11:47

Full list of fault codes can be found here ::

http://www.topbuzz.co.uk/info/fault_codes/fault_codes.htm

I think yours is the same as mine X25XE engine

http://www.topbuzz.co.uk/info/fault_codes/fault_codes.htm#bosch

code 19 = crankshaft sensor

code 16 = Knock sensor 1

I thought the 19 always happened with the engine not running ....

Crank sensor "how to" is here ..

http://www.omegaowners.com/forum/YaBB.pl?num=1174321688

knock sensor I have no idea .. hopefully an expert will pass this way and render assistance !!

HTH

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« Last Edit: 01. Oct 2007 at 11:48 by Entwood »

V6 Cam locking/setting kit, Maxscan GS500 OBDII code reader/EML resetter available. Click for some Pictures

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JasonH Senior Member Offline Posts: 953 Bristol Gender:	Re: dianostic problems Reply #12 - 01. Oct 2007 at 13:29 The best fault code list is here: http://www.omegaowners.com/forum/YaBB.pl?num=1160152415
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thegman007

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Re: dianostic problems
Reply #13 - 01. Oct 2007 at 15:34

hi guys, thanks for all the help, im sure im not the only one benifiting from this forum, i have tried it both with the engine running and not running and am getting the same codes, 19 and 132. this seems to be crankshaft sensor and EGR both saying incorrect signal, i replaced the EGR valve with another one, but the code is still the same. although the electrics on the VALVE seemed to be pointing in the oppiisite direction than the original, does this matter as i was still able to connect the electrics to it?

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TheBoy Administrator Offline TBE has an MOT! Posts: 64817 Brackley, Northants Gender: Drives: 98 MV6, 03 Elite, 00 25, 89 ZX10	Re: dianostic problems Reply #14 - 01. Oct 2007 at 21:58 19 is a failing crank sensor. Change it, it WILL let you down! Clear this code first (by replacing sensor), then see if the others disappear, though I suspect your knock sensor lead is damaged as well
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