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Omega Help Area => Omega General Help => Topic started by: submarinewasher on 30 October 2011, 12:27:18

Title: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 30 October 2011, 12:27:18
Wonder if anyone can shed light on this:

Petrol or LPG around town: fine on both

LPG on motorway: I put the foot down, and nothing. It judders and seems to gasp for breath. I switch to petrol, then it's OK. Just OK, like a 1.3 shopping trolley, not like a bat out of hell.

There was stuff coming out the exhaust - looks like horse hair, probably sound deadening come apart.

Then back in town, I stall on LPG.

 ???

Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 30 October 2011, 12:28:56
Then, when I fire it up again on petrol or LPG, blue smoke comes out the exhaust.
Title: Re: hunt and peck at motorway speeds on LPG
Post by: tunnie on 30 October 2011, 12:31:36
what engine? 2.0, 2.2, 2.5, 2.6, 3.0, 3.2?

What type of gas system, SGI or mixer?
Title: Re: hunt and peck at motorway speeds on LPG
Post by: albitz on 30 October 2011, 12:33:15
Exhausr internals are coming apart and blocking the exit of gasses.Happened to me on the M11 a couple of years ago and it felt like the car had lost 100bhp.Revs were hunting up/down similar to your description.
You need a new back box (at least) but for the moment,get an old coathanger,bend a hook on the end and fish the rest of the glass fibre out.That should provide a temporary solution and prevent the box from exploding under the pressure. :y
Title: Re: hunt and peck at motorway speeds on LPG
Post by: sandune on 30 October 2011, 12:37:19
Must try to type faster
Exhausr internals are coming apart and blocking the exit of gasses.Happened to me on the M11 a couple of years ago and it felt like the car had lost 100bhp.Revs were hunting up/down similar to your description.
You need a new back box (at least) but for the moment,get an old coathanger,bend a hook on the end and fish the rest of the glass fibre out.That should provide a temporary solution and prevent the box from exploding under the pressure. :y
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 30 October 2011, 14:30:28
2.6 V6 Tartarini multi-point.

I've done the coat hanger thingy but I pulled most of it out already last week.

I'd better go to an exhaust place - don't fancy an explosion while carrying small kids around!
Title: Re: hunt and peck at motorway speeds on LPG
Post by: Lazydocker on 30 October 2011, 14:44:59
Another vote for exhaust internals... Fix that first ;)
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 30 October 2011, 14:51:02
If the fibreglass had come out, how come the car isn't any noisier?

ebay are doing a german system for £100 (search 'omega 2.6 exhaust') but I'd have to pay £50 for fitting somewhere.
A well-known retailer whose names rhymes with Slick Brit want £140 just for the back box, albeit fitted.
Title: Re: hunt and peck at motorway speeds on LPG
Post by: Lazydocker on 30 October 2011, 14:56:09
If the fibreglass had come out, how come the car isn't any noisier?

ebay are doing a german system for £100 (search 'omega 2.6 exhaust') but I'd have to pay £50 for fitting somewhere.
A well-known retailer whose names rhymes with Slick Brit want £140 just for the back box, albeit fitted.
I wouldn't let the well known place work on a wheelbarrow ;) ;)
Title: Re: hunt and peck at motorway speeds on LPG
Post by: albitz on 30 October 2011, 14:59:11
Try Steve at Heathrow Omega spares.He may have a good used exhaust at a decent price. :y
Other wise Eternal. :y
The back box doesnt make a huge difference to noise level imo.Most of the silencing is done by the centre boxes. ;)
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 30 October 2011, 15:06:08
WoW!  :o I'm in Heathrow area!  ;D ;D ;D
I gotta go see this Steve fella.

Will let you know how it made a difference in about 7 days...
Title: Re: hunt and peck at motorway speeds on LPG
Post by: tunnie on 30 October 2011, 15:08:23
Not sure on an used exhaust personally, unless its free or cost of a beer, buy new. Its only £120 cat back for brand new V6 zorst from eternal  :y
Title: Re: hunt and peck at motorway speeds on LPG
Post by: albitz on 30 October 2011, 15:50:10
I sold one a while back for £40 which had only been on the car for a couple of weeks before I dismantled it. ;)
Depends on the exhaust and the budget imo. :y
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 05 November 2011, 21:34:45
OK folks, I bought the German one on shebay.

Awaiting delivery, then get it fitted.

Car stalls pretty much every stop light so the sooner it arrives the better.

Will report back...
Title: Re: hunt and peck at motorway speeds on LPG
Post by: albitz on 06 November 2011, 10:35:07
If you have managed to hook the remainder of the wadding out of the exhaust but your still having problems with how its running,I think you may have more than one problem. :-\
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 17 November 2011, 17:48:33
New complete exgaust from Germany £95
Fitting from local geeza £70

Car flies along on petrol or LPG now

Strangely not as rorty as my old2.5 V6, but smooth and creamy.

Yay, feel like driving the length and breadth of the UK now!

 :D :D :D
Title: Re: hunt and peck at motorway speeds on LPG
Post by: pauls on 17 November 2011, 22:46:24
Has somebody got a phone number or link to eternal. Sorry to hijack :y
Title: Re: hunt and peck at motorway speeds on LPG
Post by: TheBoy on 18 November 2011, 08:40:31
Has somebody got a phone number or link to eternal. Sorry to hijack :y
ebay shop, search for eternal omega exhaust
Title: Re: hunt and peck at motorway speeds on LPG
Post by: Auto Addict on 18 November 2011, 08:48:37
http://stores.ebay.co.uk/Eternalcar
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 11 December 2011, 10:02:51
 >:(

New exhaust only runs the engine smoothly when at cold temperature.

When it warms up, eg on motorway, it doesn’t accelerate and judders at 50mph+.
It vibrates and runs roughly, as if on 3 or 4 cylinders. (A V6 shouldn't run so rough.)
Then it loses power. I have to switch it off and wait 10 mins before re-starting


Think it could be a faulty crank sensor?
How many hours labour is that?
And what's involved?
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 11 December 2011, 10:04:13
If you have managed to hook the remainder of the wadding out of the exhaust but your still having problems with how its running,I think you may have more than one problem. :-\

Forgot to mention, the rough running is on both petrol and LPG both.
Title: Re: hunt and peck at motorway speeds on LPG
Post by: Andy H on 11 December 2011, 10:10:50
Time to read the codes.
Title: Re: hunt and peck at motorway speeds on LPG
Post by: albitz on 11 December 2011, 14:13:46
Yep - read the codes,check plug wells for oil - usual Omega stuff. If crank sensor needs changing its a 10 minute job. :y
Title: Re: hunt and peck at motorway speeds on LPG
Post by: national1075 on 18 December 2011, 17:07:45
Hi, i was suffering from the same problems as you until this afternoon. I was running out of ideas, i had done the paper clip test (no codes logged) etc,etc. Then this afternoon the side of the back box in the exhaust blew out with the loudest bang you've ever heard, I wouldn't have believed it possible for this to happen, but it has, and now the car goes like a rocket with none of the power loss or hesitancy that i was experiencing before....sounds a bit to sporty for me now though,,,lol  :y

Dave

2000 2.5 elite
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 18 December 2011, 18:45:27
Dave, it can't be my back box, mine's brand new now.

Here's an eternal question: is it worth paying a Vauxhall main dealer to investigate and/or then fix a ten-year old car?

And if not, does anyone know an independant specialist near Heathrow?
Title: Re: hunt and peck at motorway speeds on LPG
Post by: albitz on 18 December 2011, 19:01:33
No, they are invariably useless.More worthwhile to take a trip to either Alton to see Kevin Wood, or Brackley to see The Boy. ;)
Title: Re: hunt and peck at motorway speeds on LPG
Post by: submarinewasher on 20 December 2011, 22:23:11
 ;D ;D ;D

All fixed.

New airflow meter, new plugs and new leads.

Moves like the proverbial off a shovel (on petrol or LPG)

Fin.
Title: Re: hunt and peck at motorway speeds on LPG
Post by: national1075 on 26 December 2011, 23:08:49
Glad you've finally got it sorted.. ;D