Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: neal on 01 March 2008, 17:04:42
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A friend of mine recently replaced the O2 sensor pre cat, as the car was running poorly, he then reset the codes and for about 1 hour all was well. He has now replaced the mass airflow sensor and again he reset the codes, the car ran for about 60 miles and O.K. but now the emissions light has returned although the car is running fairly well I am still concerned. Has anyone any suggestions.
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Can you get the codes read (needs a TechII or equivalent).
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Faults on codes showed mass airflow sensor and autobox sensor,this was shown at a garage prior to the new maf being fitted.
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What are the symptoms?
Poor starting?
Limp mode?
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To quote Victor Meldrew "I don`t believe it" , the light has now gone out and the car seems to be running well. a mystery or what. Many thanks for your post I`l see how it goes unless you can possibly shed some light on this.
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Well, follow the maintenance guide on cleaning the breathers ond throttle body anyway....
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Well obviously I spoke too soon, the light is back on but it seems to be running O.K. any thoughts
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EGR valve? Cap it off
Throttle body? clean it
Breathers? Clean them
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When you say cap off EGR, what do you mean? Bare in mind I`m not as familiar as you Thanks
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I'm not familiar at all, just a novice.
Theres a how-to on here somewhere, involves removing egr valve, replacing gasket with a circle of metal cut from a coke can so inhibiting the egr valve from recirculating any exhaust gases without disconnecting the elelctronics from it.
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Is it safe to cap off the EGR on a 2.2 or will it cause some damage, because why is it their in the first place.
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Well here we go again, the emissions light is back on, but she seems to be running o.k.
1. I have replaced the lambda sensor pre cat.
2. I have replaced the MAF
3. I have cleaned the throttle body and breathers as per maintenance guide, I found loads of mayo and cr..p in the pipes, but something I can`t understand is when you say follow the guide, why then dont you have to clean out the rocker cover, surely this must have cr..p in it if the pipes/tubes either side are choked with mayo, or I am I being totally ignorant?
4. Would it be any advantage to block off the EGR as described in another guide and could this prevent the light coming on?
5. My last question is ,why do all these faults occur or are they just the norm for a vx, as this is my first vx, I think the car is great but I am slowly loosing it? >:(
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Does it start first turn of the key?
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Well here we go again, the emissions light is back on, but she seems to be running o.k.
1. I have replaced the lambda sensor pre cat.
2. I have replaced the MAF
3. I have cleaned the throttle body and breathers as per maintenance guide, I found loads of mayo and cr..p in the pipes, but something I can`t understand is when you say follow the guide, why then dont you have to clean out the rocker cover, surely this must have cr..p in it if the pipes/tubes either side are choked with mayo, or I am I being totally ignorant?
4. Would it be any advantage to block off the EGR as described in another guide and could this prevent the light coming on?
5. My last question is ,why do all these faults occur or are they just the norm for a vx, as this is my first vx, I think the car is great but I am slowly loosing it? >:(
As it is intermittent.....
Check the wiring going to the MAF and the EGR, look for wear and possible poor contacts.
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I forgot to say many thanks for past info and I think this is an amazing forum. Yes it always starts first time and runs well. No I have`nt checked the connections at any of the electrics but I will tomorrow weather permitting.
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Can anyone tell me where I can get a tech code reader and how much is it
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Can anyone tell me where I can get a tech code reader and how much is it
If you live anywhere near to Notts or Northants, two of the Admins have genuine TechII's.
If not, depending on where you are located, someone near to you may have a 'Cheapo TechII' and might be willing to help you.
Where are you located?
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I live in a place called Porthcawl, near Cardiff
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Hello Sir,
It would seem we have the same problem.....I replaced the first lamber sensor last week, I thought it was a cheap fix, as the garage suggested a new CAT. My 2.2 was running fantastic, until the next day, when I wanted to do a basil faulty and beat the car with a large branch.........My car went in some limp mode followed by no throttle and chugging on 2-3 pistons..I attempted 20 re-starts, nothing then I gave up and started looking at Audi's on auto trader. I cannot afford another car, so today I tinkered with it, started it up, it seemed better, while it was running I disconnected the lamber sensor, and got my throttle back. I turned the engine off and re-started and it came out of limp mode, but the engine management light was still on. It runs fine.....I too am baffled and fed up with my bloody car, it looks really nice has a huge interior and a good spec, but it has very poor electrics. If you find an answer please let me know....kind regards :y
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Does this seem familiar too?
http://www.omegaowners.com/forum/YaBB.pl?num=1206389782
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The key is to get the codes read. :y
It there's no-one near you with a code reader take it to a local garage and tell them you want to know what codes are stored (not what bits they'd like to change!) then post here.
Failing that get a "cheapo tech 2" (something like this: http://cgi.ebay.co.uk/Opel-Tech-2-Vauxhall-Diagnostic-Car-Code-Reader-OBD_W0QQitemZ270224075301QQihZ017QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem) and ead the codes yourself. Be aware that the software for these is rubbish, a lot of it is in Hungarian and it's fussy on what PC it runs. You'll need a 1GHz plus laptop with a real serial port (USB adaptors rarely work).
Kevin
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I must admit I am fed up with getting the codes read as they seem to come up with pretty much the same thing each time.
1. lambda sensor - changed
2.MAF - changed
3. Throttle body and breathers cleaned as per schedule. I know I have asked before but surely you should clean out the rocker cover as it is in between the breather pipes? Can anyone give an answer to this please!
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bit hard to clean cover bud as its all sealed !! you could clean hose connections and blast some air threw it !! :y