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[Danny]

of reading my help requests as I am of posting them

My car at the moment seems to be running perfect apart from throwing the o2 sensor codes (both banks) but ONLY while running on gas

is this purely to do with the richness of the gas?? would it make any difference that my exhaust isnt a genuine VX part (cos it was cheap and with a 3 year warranty)

[JamesV6CDX]

It still sounds like the mapping is out.
I'd suggest too little fuel rather than too rich.

Might have to have a trip up and a play when I'm running on LPG...

[Danny]

It still sounds like the mapping is out.
I'd suggest too little fuel rather than too rich.

Might have to have a trip up and a play when I'm running on LPG...

the guy thats done it always saves the settings on his laptop, is he likely to know a third party has had a play if say you also couldnt get it right and i took it back to him?

[rickyboy]

Depends on how much was changed by the third party.  I doubt he would notice to be honest.  I suspect your fuel mixture is too rich with an o2 sensor fault - if it's lean you'll bring up a knock sensor code (on the 2 litre anyway).  

As suggested a million times - GET THE SOFTWARE AND CABLES. There is a reason so many people get it for themselves even if they know nothing of cars.  When running LPG you'll be back to the guy to get a remap every couple of months.  When your warranty runs out you'll be left in the dark and won't have a clue - better to build a knowledge now rather than later.

[JamesV6CDX]

I can't do anything without the software and cables anyway.
Yep, they'd see the login date and time.

[Danny]

the reason i'm not getting the software and cables is because it would also mean i have to search for a lappy with a serial port, and ALSO, i'm selling the car!

I just want to sell it in perfect running order as a flickering EML is a major put-off, even if (for once) the car is running impeccably well (it had the gearbox updated yesterday too)

[rickyboy]

Fair enough.  Have you had it working properly for any length of time or has it been bringing up engine codes from the beginning?

[Danny]

Fair enough.  Have you had it working properly for any length of time or has it been bringing up engine codes from the beginning?

bringing up the EML all along but his own code reader didnt find anything (not proper tech 2), it's always run relatively ok (usable always), its been in and been tweeked, calibrated, altered, loads of little things, because his computer readouts looked to be practically normal, hence them not being able to completely figure it out

I had it read by Captain Zok and it threw the o2 sensor on both banks, but still actually ran fine. after it threw a wobbly i sent it back in and left it for a few hours for the guy to really pay it some attention and see what he thought, i've had it back for 3 days and not had a single problem, it runs perfect now apart from it still flickers the EML if i'm steady on the accelerator like on a slight hill, when i tap the accelerator and release it though the light goes out. When i had the gearbox update yesterday I asked him if he'd mind reading the codes (proper tech 2) and it came up with just the o2 sensors again

up until the last couple of weeks of alterations, it ran lumpy at idle, but now its perfect, very steady

[rickyboy]

Definitely sounds like a mixture problem but don't rule out spark plugs, leads etc.  Very common problem on cars running lpg (especially if the idle had been lumpy).  When were the plugs and leads last changed?

When my car throws up an o2 sensor fault it usually suggests that the mixture is too rich but if you're sure this is not the case time to start checking for leaks...

Is it plausible you could have an air leak somewhere - that would definitely muck up the mixture?  LPG can be a real minefield which you are no doubt discovering.  Another area to check is where the straws for the injectors have been inserted - defo no air leaks?

I'm suggesting an air leak simply because the car has been mapped so many times recently to no avail.  Unless the person doing the mapping doesn't have a clue (which I doubt) it should have been resolved by now.  

Definitely no holes in the exhaust either?  That would bring an o2 sensor fault up.

[Taxi_Driver]

My 2.2 complains about the O2 sensors most  times i read the ecu.........i just put it down to the lpg....and ignore them......it used to keep putting on the emissions light....but i discovered this was dependant on the make of lpg i put in it.......so assumed this was the reason for the o2 sensors whinges........

Just a thought, have you tried putting Calor lpg in it? Im think its mixed with propane?? My 2.2 definately seems to run better on it.

Anyway might be worth trying different makes of lpg to see if it makes any difference and the EML stays off  

[Danny]

Definitely sounds like a mixture problem but don't rule out spark plugs, leads etc.  Very common problem on cars running lpg (especially if the idle had been lumpy).  When were the plugs and leads last changed?

When my car throws up an o2 sensor fault it usually suggests that the mixture is too rich but if you're sure this is not the case time to start checking for leaks...

Is it plausible you could have an air leak somewhere - that would definitely muck up the mixture?  LPG can be a real minefield which you are no doubt discovering.  Another area to check is where the straws for the injectors have been inserted - defo no air leaks?

I'm suggesting an air leak simply because the car has been mapped so many times recently to no avail.  Unless the person doing the mapping doesn't have a clue (which I doubt) it should have been resolved by now.  

Definitely no holes in the exhaust either?  That would bring an o2 sensor fault up.

i'm gonna try and get it serviced but i cant get time until beginning of next month, the back and middle section of the exhaust were changed recently, front section was ok, i questioned exhaust possibilities in my first post because its a non VX part

as mentioned in PM, the injectors and stuff were all re-plumbed on tuesday afternoon. plegs were changed at time of conversion as advised prior, and leads werent needed apparently...

my thoughts are that the stuff mentioned, IE airleaks and exhaust holes, would have a noticeable affect on the feel of the car, and its running performance, on petrol aswell as gas..? it runs 100% spot on apart from the EML laffing at me