Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: devonkev on 02 December 2009, 19:05:16
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So people! Learnt a lot from this forum but can't find anything about this!
Recently she has been a bit lumpy starting in the morning and after work. When pulling away after starting she hesitates so much that you would think a stall is coming so instinctivly I was backing off the fuel. The other day I just thought I would keep my foot down to see what happens and after a couple of seconds of what felt like 5 horse power she would perk up back to normal.
I have been living with this for a while but now i have noticed when crusing ( so now running on LPG ) with only a tiny bit of pressure on accelerator she seems a tiny bit jolty ( sorry best word I could think of).
Then today it got worse. Now when on LPG there is a distinct hesitation evey 3-6 seconds that almost feels like a gear change that never quite happend ( its auto ! ). So i thought it was time for an lpg service and flicked the switch for petrol and on come the orange light with the engine looking thing on it. Its stayed on all day?
Help! I don't know what to do!
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Does it run fine on petrol? Also are you loosing any coolant?
Lastly what kind of LPG system is it, sequential or mixer?
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First thing I would check is the plugs/leads. LPG is slightly harder to ignite than petrol, it needs a "better" spark. If an engine is not running well, ignition wise, on petrol it will be a sod on LPG.
As to why the EML only lit up when you went to petrol .. dunno I'm afraid :( have you tried papercliping it ??? It would appear that a very few 2.2's do paperclip .. you might just be lucky .. if not it needs a visit to someone with a code reader .... :(
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Does it run fine on petrol? Also are you loosing any coolant?
Lastly what kind of LPG system is it, sequential or mixer?
I wouldn't say it is running fine on petrol but it is ok. Seems to be a lack of power?
Its a sequential system.
Thanks for the quick reply!
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First thing I would check is the plugs/leads. LPG is slightly harder to ignite than petrol, it needs a "better" spark. If an engine is not running well, ignition wise, on petrol it will be a sod on LPG.
As to why the EML only lit up when you went to petrol .. dunno I'm afraid :( have you tried papercliping it ??? It would appear that a very few 2.2's do paperclip .. you might just be lucky .. if not it needs a visit to someone with a code reader .... :(
Or even pedal trick ::) ::) ::)
Sounds to me like it's a missfire which has now gotten bad enough to throw up a fault code :-/ :-/
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you want to get it running right on petrol first, worth investing in a 'cheapo' tech2 from eBay, you need to get your codes read. Which will help a lot....
How does it start on petrol from cold?
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First thing I would check is the plugs/leads. LPG is slightly harder to ignite than petrol, it needs a "better" spark. If an engine is not running well, ignition wise, on petrol it will be a sod on LPG.
As to why the EML only lit up when you went to petrol .. dunno I'm afraid :( have you tried papercliping it ??? It would appear that a very few 2.2's do paperclip .. you might just be lucky .. if not it needs a visit to someone with a code reader .... :(
Thanks! I will check the leads tomorrow if I can. The lack of daylight outside working hours and no garage is a real pain in the .....
Paperclip I can do anytime so I will get on that asap.
My local vauxhall garage want £45 to read the codes! The swines.
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oh, and there is not a chance your 2.2 can be pedal tricked
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First thing I would check is the plugs/leads. LPG is slightly harder to ignite than petrol, it needs a "better" spark. If an engine is not running well, ignition wise, on petrol it will be a sod on LPG.
As to why the EML only lit up when you went to petrol .. dunno I'm afraid :( have you tried papercliping it ??? It would appear that a very few 2.2's do paperclip .. you might just be lucky .. if not it needs a visit to someone with a code reader .... :(
Thanks! I will check the leads tomorrow if I can. The lack of daylight outside working hours and no garage is a real pain in the .....
Paperclip I can do anytime so I will get on that asap.
My local vauxhall garage want £45 to read the codes! The swines.
Sorry, slightly duff info there, you cannot paper clip a 2.2.
You can for £35 or so, get a 'cheapo' tech2 reader from eBay :)
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Apologies ... I meant pedal trick .. I thought another thread said that some 2.2 ECU's were doable but not many ...
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First thing I would check is the plugs/leads. LPG is slightly harder to ignite than petrol, it needs a "better" spark. If an engine is not running well, ignition wise, on petrol it will be a sod on LPG.
As to why the EML only lit up when you went to petrol .. dunno I'm afraid :( have you tried papercliping it ??? It would appear that a very few 2.2's do paperclip .. you might just be lucky .. if not it needs a visit to someone with a code reader .... :(
Or even pedal trick ::) ::) ::)
Sounds to me like it's a missfire which has now gotten bad enough to throw up a fault code :-/ :-/
I tried the pedal trick with no luck!! Thanks though.
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you want to get it running right on petrol first, worth investing in a 'cheapo' tech2 from eBay, you need to get your codes read. Which will help a lot....
How does it start on petrol from cold?
Its starts first turn but then is a little lumpy/jumpy, then the feeling as if it might stall when you first pull away. This only last 30-40 seconds.
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would this do the job?
http://cgi.ebay.co.uk/VAUX-COM-Diagnostic-Tool-"My Naff Code Reader"-"My Naff Code Reader"-UK-SELLER_W0QQitemZ250539561347QQcmdZViewItemQQptZUK_Diagnostic_Tools_Equipment?hash=item3a55525183
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Apologies ... I meant pedal trick .. I thought another thread said that some 2.2 ECU's were doable but not many ...
I believe its the very, very early ones. Mines on a X and cannot be done, so think its only ones older than mine! (March 2000)
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we have the same prob with the limos....... you need to try better plugs....
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sorry meant to say that with lpg your engine burns at a higher temp in the cylinders and this tends to burn the plugs....a better grade plug should eleviate this...
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I find the GM 4 electrode plugs are very happy on LPG.
Kevin
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This was happening with my lpg system
even worse it sometimes took 10miles to change over to gas, then from then it kept switching back to fuel - very annoying
i got a someone whos in the know to look at it and he found it to be the water feed from the top of the header tank was blocked
unplug the pipe from the head tank and follow it to whereever its connected, sorry not 100% where that is engine somewhere
it was so blocked up no water was getting though, so he drilled the inlet hole where the pipes goes into on the headertank so water was feeding though propley
then got a air gun to blow though the pipe to make sure it was fully unplugged.
since then it worked spot on
the pipe was blocked meaning the water wasnt heating the gas propley therefore not making the gas hot enough to be used for fuel
try that, hopefully it'll help
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you want to get it running right on petrol first, worth investing in a 'cheapo' tech2 from eBay, you need to get your codes read. Which will help a lot....
How does it start on petrol from cold?
Its starts first turn but then is a little lumpy/jumpy, then the feeling as if it might stall when you first pull away. This only last 30-40 seconds.
Is this on petrol? Have you been loosing coolant?
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This was happening with my lpg system
even worse it sometimes took 10miles to change over to gas, then from then it kept switching back to fuel - very annoying
i got a someone whos in the know to look at it and he found it to be the water feed from the top of the header tank was blocked
unplug the pipe from the head tank and follow it to whereever its connected, sorry not 100% where that is engine somewhere
it was so blocked up no water was getting though, so he drilled the inlet hole where the pipes goes into on the headertank so water was feeding though propley
then got a air gun to blow though the pipe to make sure it was fully unplugged.
since then it worked spot on
the pipe was blocked meaning the water wasnt heating the gas propley therefore not making the gas hot enough to be used for fuel
try that, hopefully it'll help
Is your vapouriser plumbed into the header tank breather? If so, there will be insufficient water flow to keep the vapouriser properly hot. It needs to be fitted into the heater matrix circuit to work properly.
Kevin
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I find the GM 4 electrode plugs are very happy on LPG.
Kevin
Where you using the 4 electrodes before? I have had no issues with twin, and would like to continue with those on LPG.
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I find the GM 4 electrode plugs are very happy on LPG.
Kevin
Where you using the 4 electrodes before? I have had no issues with twin, and would like to continue with those on LPG.
I'm using twins and they're fine... In fact, IMHO they're better than going down the NGK single electrode route :y :y
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This turned out to be the lambda sensor! All sorted now!
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This turned out to be the lambda sensor! All sorted now!
How did you identify the problem D? :)
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This turned out to be the lambda sensor! All sorted now!
How did you identify the problem D? :)
Bought a cheapo tech 2 thing of ebay. It is the type where you plug it into a laptop with the software loaded on to it.
It pulled up these codes:
P0135 - O2 Sensor 1 Heater Open Circuit
(04) - Present
P0030 - O2 Sensor Heater Circuit Range/Performance (Bank 1 Sensor 1)
(08) - Present
P0130 - O2 Sensor 1 Open Circuit
(04) - Not present
I then assumed it was the lambda sensor but phoned up a auto electrician who then confirmed my hunch when I told him the codes.