Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: dopey on 25 October 2009, 17:59:26
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Hi guys
New here and could do with some 2nd opinions if you have the time.
Approx 3 months ago I got the heater bypass valve changed.
Pretty much instantly the car developed a wicked miss-fire, sounded like a traction engine with a bunch of spanners lobbed in.
The miss-fire has remained but is inconsistent - it is generally there on start up but then usually clears after a few miles/mins.
Then the other day I was in the fast lane of the M1 and the engine just died. Electrics and everything else fine, starter motor fine etc.
Long story short - it starts when its cooled down, but is now rougher than a rough thing.
Reading other posts it looks to be crank sensor, so I did pedal test which seems to concur. However, it also kicked up a 560-system voltage and 230-fuel pump circuit error.
Just wanted to check if crank shaft sensor could have caused all of these issues or if maybe the ECU is playing up etc
Any advice would be V helpful
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HBV has nothing to do with engine firing. Assuming the garage did the work? Do you know if they messed around with the HT leads?
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HBV - near the dispack, innit?
Knocked a lead or the 12V cable?
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They accessed the HBV by taking the top part of the engine off (plenum?) the 4 leads out of the back of it were dotted up with numbers on the case and leads, so looks like they matched everything up.
Apologies for the lack of knowledge on the engine setup - fine on bikes but this V6 is a different kettle of fish.
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the fact this just started as soon as the HBV was changed suggests the garage messed up the order of the HT leads
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If the ht leads were in the wrong order, would the car not be running rough all of the time rather than just initially?
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If the ht leads were in the wrong order, would the car not be running rough all of the time rather than just initially?
They might not have pushed it home all the way?
Crank sensor would cause the car to die on the motorway, then start later. Normally i would say crank, but the fact this started as soon as the HBV was changed makes me think the garage did something.
Do a pedal test to get the codes
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Think I'd be changing the crank sensor if it's showing up a fault code then see how it is.
The pedal test may be showing some old codes that have since cleared but are still stored in the ecu.
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I got 335 - crank sensor, 560 - system voltage and 230 fuel pump.
So suggests crank sensor - but agree with you that timing of the problem seems a bit of a coincidence. Plus not sure what the other codes mean in idiot-speak and whether they are related or not.
The nice AA chap ran the codes stored at the time and they were general misfire codes, so he cleared them out. The 3 codes above have cropped up in following the last start up attempt after the codes were cleared.
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crank sensor is a code 19, double check those codes again....
But your right get the crank sensor changed, but i think there maybe other issues here as well.
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Was using the codes taken from
http://www.omegaowners.com/forum/YaBB.pl?num=1220619694
Should I be using different codes? Its a 2001 2.6 V6.
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Err just a point chaps, how many plug leads does a 2.6 have?
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Thumbing through haynes manual as I type - dont think those 4 leads are actually the plug leads.
As I say - apologies for lack of grasp of V6. Trying to get up to speed with it, though Haynes don't make it easy!!
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Err just a point chaps, how many plug leads does a 2.6 have?
Good point ;D
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Err just a point chaps, how many plug leads does a 2.6 have?
Good point ;D
;D ;D They tend to be a bit light on dis packs too.
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Thumbing through haynes manual as I type - dont think those 4 leads are actually the plug leads.
As I say - apologies for lack of grasp of V6. Trying to get up to speed with it, though Haynes don't make it easy!!
They are breather pipes mate.
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Feel free to take the pi$$ :-[
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Feel free to take the pi$$ :-[
Some of it is my fault, i did not notice you had a 2.6 (which has coil packs) and not HT leads.
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Feel free to take the pi$$ :-[
Out of Tunnie, we always do. ;D ;D
Don't worry mate everyone was new once. :y
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Ahh - now I understand :)
So it sounds like a new crank sensor might be a good place to start - I assume genuine vauxhall would be preferred to pattern parts.
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Feel free to take the pi$$ :-[
Out of Tunnie, we always do. ;D ;D
Don't worry mate everyone was new once. :y
Since Dopey is new we better enlighten him:
1) I live at home, lots of people like to make fun of that.
2) I used to be a student bum, most thing i still am
3) My car only has 2/3 of an engine
4) I have an old mans bike, which apparently is slow!
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Ahh - now I understand :)
So it sounds like a new crank sensor might be a good place to start - I assume genuine vauxhall would be preferred to pattern parts.
Yup 90540743 £51.50 retail, £39.92 Tradeclub (both + vat)
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liking the 2/3 of an engine thing!!
Bike can't be slower than mine - due to it currently being scattered around much of the garage. Got a tad carried away on it's pre-winter strip down ;D
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Feel free to take the pi$$ :-[
Out of Tunnie, we always do. ;D ;D
Don't worry mate everyone was new once. :y
Since Dopey is new we better enlighten him:
1) I live at home, lots of people like to make fun of that.
2) I used to be a student bum, most thing i still am
3) My car only has 2/3 of an engine
4) I have an old mans bike, which apparently is slow!
You missed out what you earn! ::)
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Feel free to take the pi$$ :-[
Out of Tunnie, we always do. ;D ;D
Don't worry mate everyone was new once. :y
Since Dopey is new we better enlighten him:
1) I live at home, lots of people like to make fun of that.
2) I used to be a student bum, most thing i still am
3) My car only has 2/3 of an engine
4) I have an old mans bike, which apparently is slow!
You missed out what you earn! ::)
Far as i remember, they don't take the pi$$ of that. ;D
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Nice one fellas :y
I'll add the crank sensor to this weekends chores - along with finish kitchen, bathroom and bike and see how she runs.
Thanks for the advice - will keep you posted
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Feel free to take the pi$$ :-[
Out of Tunnie, we always do. ;D ;D
Don't worry mate everyone was new once. :y
Since Dopey is new we better enlighten him:
1) I live at home, lots of people like to make fun of that.
2) I used to be a student bum, most thing i still am
3) My car only has 2/3 of an engine
4) I have an old mans bike, which apparently is slow!
You missed out what you earn! ::)
Far as i remember, they don't take the pi$$ of that. ;D
Perhaps not face to face ......
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Guys - this may be an odd question, but how does the plug (for the crankshaft sensor) at the top rear of the engine actually clip into place. I can get my hands to it (well finger-tips), but dont want to break anything by forcing it when there may be a clip. seems a shame to have to take the scuttle off (especially given that the last person to try it has rounded off the nuts on the wipers).
wasn't me - honest ;)