Thread: LPG Gas Problems on D2 - brand new installatioin

Removed plugs (plantinum, on 3k old), they were totally stuffed. 1 bank all black, with evidence of spark. Other bank only half (1 side) black/burnt,with no evidence of spark. Started on petrol ok, sounded ok. Went for a drive and it started to play up again. Switched to gas and it was good for about 3 ks on the open road, did a uturn to come home and by the time I got to city limits I had no power again and running rough.

Pulled 1 plug out and it looked fine.

Coils - is a likely consideration?

Will look at leads tonight when she gets dark.

Coils don't cause many problems,I would buy Low resistance plugs and leads,make sure they are when you buy them.If the plugs are knackered a new coil won't do anything.OK I just took one out and the electrode is grey and looks like new,they are NGK BP6E S.The things I do for you!!!! Pat

The first thing I would do before touching anything is write to the installer setting out the problems and request that they fix it within a reasonable time, and ask politely that if they feel they cannot that they pay for correction by another specialist.
Just make sure that everything is in writing so that if the problems are not fixed you have recourse to Consumer Affairs etc. And be polite.

You will have multiple coils, so check that there is no ooze from any of them.
I know little about LPG but it occurs to me that there must be an interface problem between your ECU and the LPG ECU or the installer has stuffed up a connection( my Bet)
I believe that the multi point LPG ECUs take a signal from the petrol ECU injector harness to determine the pulse width for the LPG injectors. I wonder if the petrol injectors are being turned off or the LPG injectors on in one bank. Maybe a poor connection.
Another area is the timing pulse from the crank sensor or cam sensor. Maybe a bad join.

Regards Philip A

Pat,
The plugs I put in were bk6e. So I guess the same in the scheme of things. Thanks for pulling one out!!
Dave.

Philip,
Thanks. I had emailed installer + phone call. He reckons cars problem was there before they installed gas, which isn't the case. I'll persevere with them, but will take it to LR guy to try and get it sorted etc. I really need to have 2 cars going, so cannot afford the delays.
Will post any updates, so others don't have the same dramas.
Dave.

Do the petrol ECU and the LPG ECU both use the same oxygen sensors?

If they do it is a common link. If your plugs are black that would indicate it is running rich wouldn't it?

So if the oxygen sensors are not connected properly then maybe it runs rich as a default like the Disco1 would.

When I had my system installed, the workshop insisted that they would not do any work unless the car was running perfectly & the ignition system was in tip top shape.

Originally Posted by Slow Disco

Removed plugs (plantinum, on 3k old), they were totally stuffed. 1 bank all black, with evidence of spark. Other bank only half (1 side) black/burnt,with no evidence of spark. Started on petrol ok, sounded ok. Went for a drive and it started to play up again. Switched to gas and it was good for about 3 ks on the open road, did a uturn to come home and by the time I got to city limits I had no power again and running rough.

Pulled 1 plug out and it looked fine.

Coils - is a likely consideration?

Will look at leads tonight when she gets dark.

G`day Dave , just a suggestion .

Take it for a run on lpg only don`t use petrol at all then pull all the plugs .

If there are a number of plugs that are black then it is possibly trying to run both fuels at the same time , this could explain why it acting as it is ( both loss of power and misfires ) and would be an installation problem and the installer would be hard pressed to argue .
It may have been the way he explained it but how he says the injectors work would be a worry for me if he`s serious .

Another thing is that i think it will be a franchise so head office may be an option .

Cheers

Peter