nicka2804
New Member
- Posts
- 47
- Location
- Bradford, West Yorkshire
Hi all,
i have a 1998 4.0 gems p38 with a tartarinni etagas system fitted.
i have been having some trouble with the lpg running. sometimes it will stall and run like a bag of crap, where as when driven steadily will run quite well. like on motorways etc
if you give it full throttle like overtaking something for example it dies out and missfires terribly like fuel starvation. it seems to run perfectly fine on petrol pulls well and no missfire at.
so today had it down at a local lpg specialist who hooked up the tartarinni gas software on his laptop. the gas ecu had recognised a lambda sensor fault. the gas pressure had already been adjusted as high as it could be, somebodys been playing!
He cleared all faults and adjusted the mixture and the switchover rpm. this seems to have improved things but still when you hit kick down it still is lacking power and stumbles. he had a cheap eobd reader which he hooked up to look at the lambda sensor readings on live data and he said one of them was stuck and not switching properly. no fault codes stored though.
the initial thought was the vapouriser was at fault but since seeing the lambda sensor fault he suggested sort them out and then try it. then if it is still the same the vapouriser can be swapped out and then tuned with correct running values.
from what i know of the system i believe it calculates gas mixture on the lambda sensor and throttle position i dont think it monitors maf sensor with it being an early system, i could be wrong.
since owning the car i have changed:
HT leads
Spark plugs (tried both ngk and now has some brisk/brink?! lpg plugs in)
Cleaned out the stepper motors for the gas (common for them to gunk up apparently)
Cleaned out MAF sensor
Had gas system serviced with new filter etc
i had the car mot'ed couple of month back at work and it would not go through emmisions on gas and struggled on petrol so lambda sensors sound likely or possible exhaust air leaks.
does anybody have any thoughts on this and possibly some spec for what the lambda sensors should be reading on data list?
Thanks in advance, any advice is greatly appreciated!
i have a 1998 4.0 gems p38 with a tartarinni etagas system fitted.
i have been having some trouble with the lpg running. sometimes it will stall and run like a bag of crap, where as when driven steadily will run quite well. like on motorways etc
if you give it full throttle like overtaking something for example it dies out and missfires terribly like fuel starvation. it seems to run perfectly fine on petrol pulls well and no missfire at.
so today had it down at a local lpg specialist who hooked up the tartarinni gas software on his laptop. the gas ecu had recognised a lambda sensor fault. the gas pressure had already been adjusted as high as it could be, somebodys been playing!
He cleared all faults and adjusted the mixture and the switchover rpm. this seems to have improved things but still when you hit kick down it still is lacking power and stumbles. he had a cheap eobd reader which he hooked up to look at the lambda sensor readings on live data and he said one of them was stuck and not switching properly. no fault codes stored though.
the initial thought was the vapouriser was at fault but since seeing the lambda sensor fault he suggested sort them out and then try it. then if it is still the same the vapouriser can be swapped out and then tuned with correct running values.
from what i know of the system i believe it calculates gas mixture on the lambda sensor and throttle position i dont think it monitors maf sensor with it being an early system, i could be wrong.
since owning the car i have changed:
HT leads
Spark plugs (tried both ngk and now has some brisk/brink?! lpg plugs in)
Cleaned out the stepper motors for the gas (common for them to gunk up apparently)
Cleaned out MAF sensor
Had gas system serviced with new filter etc
i had the car mot'ed couple of month back at work and it would not go through emmisions on gas and struggled on petrol so lambda sensors sound likely or possible exhaust air leaks.
does anybody have any thoughts on this and possibly some spec for what the lambda sensors should be reading on data list?
Thanks in advance, any advice is greatly appreciated!
