Mondeo 1.8 problems.

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mondeoman
Posts: 2
Joined: Wed Jan 14, 2009 1:20 pm
LPG System: OMVL Dream 21

Mondeo 1.8 problems.

Post by mondeoman » Wed Jan 14, 2009 1:59 pm

two years ago I bought a 53 plate Mondeo 1.8 with an after market LPG conversion, An OMVL system.

The car started to misfire after about six months, being under warranty it went to the approved garage who changed the coil pack, problem solved. A few months later the misfire began again, this time more noticeable on LPG, after a few minutes running on ULP it dissappeared. I contacted OMVL who put me in touch with my nearest specialist service agent, who identified some issues with the car so referred me to a garage to sort them first. The main issue was noise coming down the induction pipe thru the filter box.

This time it went to my preferred garage who lifted the head off, expecting to find regression etc, but no major issues. One burnt valve was replaced, the rest were cleaned and reseated. No regression. A flashlube was fitted as a safeguard as the car didn't have one.

After re-assembly the car ran well but i noticed some changes to how the LPG system runs. It switches to gas much too early IMO, after only a few seconds running, well before the engine is warm. That said it wasn't a problem.

During this recent cold weather the misfire has returned, again apparent on LPG only and the colder it is, the worse the misfire. It is most apparent when idling which is quite lumpy even when warm, when cruising at 30mph in 4th there is a persistant misfire, or when accelerating from low rpm when there is a big loss of power, almost a retardation.

And so back to the LPG fitter, a local fitter this time who was reccommended to me. They raised some intersting issues.

The system fitted is older than the car, it is an OMVL Dream XXI, which he thinks is about 7 years old (2001/02). The receipt for the install by Nottinhgam Autgas shows it was fitted in 2004. The system is not the ideal one for my car and the atandard of the install is questionable. Add in that the interface connector as been left hanging in the airflow under the car and has disintegrated they don't much like the look of it. They are getting hold of OMVL to see what spares they can still get.

I have a few questions if anyone can help:

Obviously - any idea on the misfire. Spark is good, injectors seem OK. I'm wondering if the issue is in the reducer?
How do I tell what type of OMVL Dream I have, there have been a number of versions of Dream XXI I understand?
Assuming I can get around the connector issue how easy is the interface software to use, can it do things like amend the warm up time etc?
Presuming I can replace the connector, how easy is it to use the set up software. Does it have any fault reporting facility that may identify a problem.

Finally, and if all else fails how easy is it to remove this kit. A new inlet manifold would be needed I guess, but for a Mondeo they are easy to find at breakers. How would you empty the LPG tank?

Thanks

mak-uk
Posts: 288
Joined: Mon Sep 03, 2007 8:48 pm
LPG System: Prins VSI
Car: BMW 540iA Sport
Location: All over the UK

Re: Mondeo 1.8 problems.

Post by mak-uk » Wed Jan 14, 2009 7:57 pm

Hi
mondeoman wrote:After re-assembly the car ran well but i noticed some changes to how the LPG system runs. It switches to gas much too early IMO, after only a few seconds running, well before the engine is warm. That said it wasn't a problem.
Change-over temp is set in the software - if too low, it can cause lumpy idle/running when cold as the car is running the petrol enrichment mode.
mondeoman wrote: During this recent cold weather the misfire has returned, again apparent on LPG only and the colder it is, the worse the misfire. It is most apparent when idling which is quite lumpy even when warm, when cruising at 30mph in 4th there is a persistant misfire, or when accelerating from low rpm when there is a big loss of power, almost a retardation.

And so back to the LPG fitter, a local fitter this time who was reccommended to me. They raised some intersting issues.
So no problem on petrol at all? Bear in mind that LPG magnifies ignition problems before they could appear on petrol. Did the fitter check the OMVL software set-up for errors or do a re-tune?
mondeoman wrote: The system fitted is older than the car, it is an OMVL Dream XXI, which he thinks is about 7 years old (2001/02). The receipt for the install by Nottinhgam Autgas shows it was fitted in 2004. The system is not the ideal one for my car and the atandard of the install is questionable. Add in that the interface connector as been left hanging in the airflow under the car and has disintegrated they don't much like the look of it. They are getting hold of OMVL to see what spares they can still get.
Dream XXI and XXI-N are different systems and the software is not interchangeable between them.

As far as I have read, the earlier XXI has an inbuilt map sensor, so there is a vacuum pipe connection to it. The later XXI-N has an external map/pressure sensor. Also, the Dream XXI-N has 'XX1' written on the ECU with an 'N' lower down on the label in red.

Hope this is of some help.
Mak
Site Owner
2001 BMW 540i Auto Sport Saloon
~300 BHP; ~320 ft/lbs, Prins VSI system

mondeoman
Posts: 2
Joined: Wed Jan 14, 2009 1:20 pm
LPG System: OMVL Dream 21

Re: Mondeo 1.8 problems.

Post by mondeoman » Wed Jan 14, 2009 9:02 pm

Hi Mak, thanks for your replies.

No - no issues on Petrol, knowing that LPG can be more demanding on the ignition I have put a new coil, plugs and leads on, a very slight improvement maybe. Petrol running is fine, idle is smooth, acceleration response is good.

I'll get a better look at the ECU at the weekend but pretty sure it's just marked XXI or XX1, no suffix visible.

My next step will be to change the vapour side filter, also I'll fire off an email to OMVL, see if I can find the interface cable and software for the original XXI series. All of the online suppliers seem to supply XXI-n only. I've seen some screen shots of the software since my earlier post and vap temp, delay and rpm settings for change over all seem pretty easy to do.

The car is heading towards 100k, at 25k plus per year I was hoping to get another 18 months even two years from it. Maybe now it will be nearer twelve months and I'll either break it or take it off the road for a few months, lift the manifolds and head off, have a good look at it. The vacuum system also seems to have been botched about a lot, lots of t's and x pieces. It may be a case of tidying that up and replacing some lines.

I'm lucky in having a spare motor in the drive, that I can put back into use while I'm doing it.

dhargeaves
Posts: 2
Joined: Tue Mar 08, 2011 1:54 pm
LPG System: dream xx1
Car: omega

Re: Mondeo 1.8 problems.

Post by dhargeaves » Tue Mar 08, 2011 5:20 pm

Hi, all,
I have had similar problems and after going through all the petrol associated parts. I know it’s the LPG. After servicing the injectors, I have had intermittent faults (as before servicing). Now my dreamxx1 LPG system on my Vauxhall Omega does not work at all.
The gas indicator (on & off button) does not light up at all. The vacuum pipes were perished and came off a while ago and it hasn’t worked since. No reply from dream helps line either.
Has anyone any diags to show where they go, as I think it needs to sense a vac before it will even turn on. The perishing pipes may well explain my occasional problems as well.
Please HHHEEELLLPPP. This is costing me and my nearest “Dream Man”(mechanic)is in Yorkshire.
1 itsy bitsy drawing may solve the whole caboodle................CHEERS...........DAZ

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