LPG Discussion Forum

Could also be a vacuum leak or as rossko said many other things?
you need to pull some codes or data!!

I am working through a similar problem on an XJ6 with same engine, there are specific areas which have known vacuum leaks which can cause rough idle, as well as duff plugs, coils etc?

I hope it ...

Thanks 57jam89
Thats reassuring will fit the return after I get back.
do you or have you used flashlube with th 3.0L? I see conflicting statements about it being needed on Ford duratec petrols?

Joe

Hi Thanks for all the help But need to put it on Hold
Have had to make unexpected trip to scotland for Funeral,
did it on petrol most of way only used LPG when reserve light came on on M6.

Its gonna have to wait till I get back.

Thanks again

Thanks rossko will do

Latest: have lashed in 2 temp sensors to the 2 sets of black and orange wires,
get reducer temp of 45 and gas temp of 60 plus. tried to auto calibrate and keep getting message " Can't calibrate gas temp too low"

I would have thought anywhere above 40 would be ok?
Also being an auotmatic should it ...

Eventually made connection to zavoli ecu, it only seems to like ver 6.1.1.0IC tried about 12 others, earlier and later versions that I could find, and bingo worked with this one?

So now can see whats going on and immediately see, with engine just on, gas temp is at 110deg? have traced reducer ...

Started fitting the petrol return, the kit includes a solenoid valve with integral 180 degree lever which allows it be used as normally open or closed
interestingly the Y piece has 2 nipples and a 0.8mm mig tip for branch to solenoid as restrictor, I put in a 1.2mm mig tip which was between your ...

Plug on lead is No1 all wires in top row below clip.

Using windows 7 device manager doesnt show any conflicts and has USB Serial port in Com2

I think injectors are Matrix its a black block with big chunky connector attached.
I have 6 new OMVL fast injectors I bought couple of years back and never ...

http://www.ebay.co.uk/itm/Zavoli-Uni-Prog-USB-PRO-LPG-GPL-CNG-Autogas-Programming-Interface-Tuning-Kit-/361256793743?pt=LH_DefaultDomain_3&hash=item541c95368f
This is the item using the white connector.

Yes checked the bigas ecu and it has 2 plugs of 3 rows of pins, The Zavoli has longer plug with ...

Sorry Rossko my post is confusing!
The ECU has the big sticker on front with Zavoli Alisei N but no sticker on side with date or ver no?
It has a date stamp on back of alloy case which ties up with the first MOT showing LPG 2008.

I have a BIGAS sequential ECU 6 cyl in a box date stamp is Feb 2005 2 ...

Quick update, Have the petrol return kit will install tomorrow.
Also got the new interface but no matter what I try it wont communicate with zavoli ecu get C03 and C04 errors have tried every version of their software from N4.6.3 UP N6.1.2.0IC?
The ECU doesnt have its sticker but date stamp on back ...

Pssibly because you are trying too hard!!
from my perspective its verging on badgering?

Thanks rossko, I have ordered a return kit from Tinley Tech, looking at Pic think there is a valve of some sort or whether its the solenoid.
Will look when it turns up and if needed use your method and drill.
I have a copy of Jag software so will use live data from it.

Thanks again will report back ...

Thanks Simon, No it is a 2003 XJ6, Ally Body, with 3.0L engine as in X and S types.

Its a while since I messed with an LPG system so tried an old RS232 interface with Zavoli software but couldnt connect, so have ordered a new USB one from internet.

Will report back when it comes and get some data ...

Thanks Rossko,
from reading about the Jags petrol pressure issues, is it best to forget about an emulator and fit return line or buy a new emulator and fit that first?

Hi just bought a 2003 x350 XJ6 with LPG. seems install was done 2008 from old MOT's and has done 140K
Firstly the Zavoli install looks poorly done, but main problem is it struggles to start on petrol with rough idle, and will only idle after engine is warm say 1/3rd on temp gauge.
Runs reasonably ...

Hi normally I would nave used NGK but I had the Denso's lying around and have always found them to be equal to NGK and beetter than the rest?
I have copy of software now so will have a look at how its running over next few days and then decide next step. I got the car for the price of a cheap 4cyl ...

Hi just returned to LPG cars after a few years out. Bought an 4.0l S TYPE Jag with Romano RISN conversion. It felt a bit gutless so decided to check/replace Spark plugs. The existing plugs were Platinums and gapped at 1.3mm? checked on web and fitted denso iridiums and gapped to 0.8mm.
It seemed ...

Hi, That Saab engine looks like 9-5 B205 engine?? I have converted my 9-3 2003 2.0t, yes it is the Z20NET or B207 as Saab call it; have only done 10K since conversion but it is quite easy and haven't used flashlube? Don't know if I will regret it but at moment looks OK. The older Saab turbo's were ...

Hi, as some one like yourself who wanted to give a diy install serious consideration; I can only agree with Tubbs. if you know your way around the engine and bodywork of a car and listen to what advice is available, then a diy LPG install should be not too difficult.
I used the cheap and cheerful ...