Omega Owners Forum
Chat Area => General Discussion Area => Topic started by: Craig_R on 24 June 2007, 14:44:48
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Went To Take The GirlFriend to the Shop Today and something went wrong again only happens when she is in the car ::)
Pulled away at some traffic lights and put my foot down and the car Backfired on LPG I think the Vap is on its way out any way the EML came on :-?
Paper Clipped It at the Shop Car Park and the Code 0100 came up and I remembered that this is the MAF sensor so checked the engine and found why it came up with this code.
The Stopper circled in red had blown off with the back fire. Looked in the Engine Bay But its not there >:( it must of fallen though the engine bay and i could not see it on the way home on the road where the back fire happened
(http://www.firedragon.com/~swamp/engine-backfire.jpg)
Does anyone one have a spare ? My local Scrappy is rubbish and i dont like going there as they look and talk to me as if i have two heads.
Thanks
Craig
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There is a shortage of Omega's in our local scrappy now, only 1 2.5 CD there now :(
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There is a shortage of scrappys in our local scrappy now, only 1 2.5 CD there now :(
And no diesels :'(
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I was in my local scrappy about an hour ago but no omegas...
CraigR - Have you go two heads ? ;D
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There is a shortage of Omega's in our local scrappy now, only 1 2.5 CD there now :(
Thats coz you've had them all out in your pocket :P
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I wonder if its the same air intake on the Vectra and other VX 2 liters might get the part off one of those.
I have had to use Gaffer Tape To Block Up the hole or the MAF get rather upset this will have to be a TEMP measure till i find a Stopper or replacement Air Pipe.
Who has been nicking all the omegas out of the scrappy's
Last time i checked I still only have one head but ill have to double check :D
Craig
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Craig.....check all the gas hose connections (jubilee clips maybe) and the air hose connections.
Mate of mine had his Omega converted to lpg.....kept banging......tho not backfiring or maybe it was....tho petty certain he told me every now and it would just bang!......garage eventually found a loose connection on a pipe that was causing it.
Why do think the evapourator is iffy? Is it switching back to petrol when it likes?
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I Think The Vap is on its way out TD because it searches alittle Also now and again it stalls only when pulling up to an exit say of a motorway at speed as soon as you put your foot on the clutch the revs drop all the way down and then Stall but its only now and again and i have figured that if i leave pressing the clutch as late as poss ie if the car is nearly at stand still it never stalls.
I did some searches online and acouple of people said it was a Vap failing that causes this.
Oh and I think the backfire was caused by the LPG tank being very low Cough Cough forgot to fill it up again it can cause backfires if the LPG pressure is right down here is some info i found on it
With my System Being an old Mixer System I guess the below applys lol
As tank contents reduce it follows that tank pressure will reduce. That means less fuel gets to your vapouriser and ultimately to the engine. If allowed to get to a critical level, the fuel/ air mixture can become so 'weak' (not enough fuel mixed in the air inducted) that the engine may 'backfire' through the induction system, especially when the throttle is opened wide from a low setting. This can cause problems ranging from a simple 'popping' sound right through to a large bang and damage to air filter boxes, airflow meters and anything else in the induction system. Most LPG conversion specialists will fit an anti - blowback damage protector in the form of a one-way valve to cover any malfunction but this can only protect your system from minor backfire occurrences. If you let your LPG tank run right down to empty your chances of this happening increase a hundredfold and it won't be the fault of the installer or the equipment that was fitted for you. You may normally expect fair warning of low LPG tank contents from your vehicle as the engine may well become 'sluggish', especially during acceleration (much the same as running out of Petrol). If this happens, don't wait for it to stop altogether. Switch over to Petrol rightaway
Craig
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I Think The Vap is on its way out TD because it searches alittle Also now and again it stalls only when pulling up to an exit say of a motorway at speed as soon as you put your foot on the clutch the revs drop all the way down and then Stall but its only now and again and i have figured that if i leave pressing the clutch as late as poss ie if the car is nearly at stand still it never stalls.
I did some searches online and acouple of people said it was a Vap failing that causes this.
Craig
Hvae you cleaned the evaporator and drained the gunge out?
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I Think The Vap is on its way out TD because it searches alittle Also now and again it stalls only when pulling up to an exit say of a motorway at speed as soon as you put your foot on the clutch the revs drop all the way down and then Stall but its only now and again and i have figured that if i leave pressing the clutch as late as poss ie if the car is nearly at stand still it never stalls.
I did some searches online and acouple of people said it was a Vap failing that causes this.
Craig
Whats your water level like? Low water can cause this.....hot water isnt circulating the evapourator.....engine running and upto temp....put your hand on the evap....is it really hot? If not you will have a air lock.....if it is really hot.....get the pressures checked of the lpg first :y
Its a bit of a bugger trying to fault find lpg probs......it could even be your dis pack giving a weak spark.....tho that tends to give missing symptoms not backfiring.....tho you do say it hunts a bit :-/
Rarely vap fails......i know i had the veccyC one replaced....but that was coz of pressure wrong on gas....and the adjustment on the gas on the veccy was on the vap and wouldnt adjust....
Think you need to get it checked by lpga installler before spending big money on it :y
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I cleaned It about 8 months ago and there was not much you could get to on where the coolent water gos in and out it has a small area and the back could be taken off but there is a big Diaphragm kind of thing there and I did not want to touch it incase i damaged it. Ill have a look again at it tomorrow night after work to see if its gunked up and take some photos to post
Thanks Martin
Craig
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That's OK
Take Daves advice and check the water circuit too
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Thanks TD Ill have a look tomorrow
I know my Coolent Level Is Fine checked that today.
ill be at the Meeting next weekend I hope and i can go through bits with you see what you think :y
Craig
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Well Stripped Down the Vap today and gave it a clean and checked all the Rubber in it and everything seemed fine no rips or anything.
Checked the LPG Filter Also Seemed Fine but gave it a clean also.
Ill put it all back in the car tomorrow see how it is
Craig