Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Tezray on 16 May 2011, 13:23:30
-
Can anyone identify what LPG kit I have fitted to my car from this picture?? Unfortunately the sticker has been partially rubbed off (sorry it's upside down :();
(http://img.photobucket.com/albums/v219/tezray/Wots/20110514_001.jpg)
It's clearly an AC Stag 300 ??? Premium? Plus? Bog standard?
I would also very much appreciate if someone could tell me roughly how much this valve should be open on my tank... fully open? 1 turn? 2 turns?
(http://img.photobucket.com/albums/v219/tezray/Wots/TankValve.jpg)
I do need to get the cable to plug into the system and have a look at what it's up to as it's definately not running 100% right. Any info would be gratefully received :y
-
Using my skills fo deduction,I would say....STAG..but that is the extent of my knowledge on anything LPG.
-
Ops....sorry just read below the picture and you have identified it...should have gone to "spec savers"..sorry.
-
Haha yes unfortunately there are several variants of the Stag 300 kit, I should have made that more clear.
The more important question for me is how much to open this valve by, as i'm concerned that i'm either starving or flooding the system... the other concerning thing is that when I had the engine running the other day I completely shut off that valve and expected the car to switch back to petrol, but it kept on running on gas :o Which I suppose suggests that the valve may be duff ::)
-
That's the standard STAG 300 kit. That valve should be fully open, it's just a manual shut off valve as backup. The reason it kept running is because of the fuel already in the lines ;)
-
looks like that ECU has been mounted upside down?
-
That's the standard STAG 300 kit. That valve should be fully open, it's just a manual shut off valve as backup. The reason it kept running is because of the fuel already in the lines ;)
Thank you mate :)
What is the difference between the premium and the plus kit? Also, if I wind this valve back will it come to a stop or will it shoot out under pressure and release all of the gas in my tank :o Because that's what i've been expecting to happen so i've only been opening it 1 to 2 turns! Will that be restricting the delivery of gas?
The ECU has indeed been mounted upside down... I think I may need a new filter as the power's not as good on gas and it doesn't idle fantastically either. I could really do with plugging into it and watching it run, but I don't have the Stag lead.
-
Should be mounted with the plug at the bottom ;)
If you can get along to the Bucks meet in a couple of weeks I'll we'll happily look it over for you and I'll have my laptop and lead with me ;) ;)
-
Full PDFs here
http://www.ac.com.pl/en/
Stag 300 Plus adds 3D calibration map
Stag 300 ISA2 adds ISA2 autocalibration (ISA2 seems to be just a F/W update from Stag 300 Plus)
Stag 300 Premium adds OBDII calibration
-
looks like that ECU has been mounted upside down?
So should yours be. ;)........so should mine be, but currently it isnt. :-[
-
Should be mounted with the plug at the bottom ;)
If you can get along to the Bucks meet in a couple of weeks I'll we'll happily look it over for you and I'll have my laptop and lead with me ;) ;)
Thank you mate i'll see if I can make it :)
Is there any reason why it should be mounted with the plug at the bottom? Is it to avoid water ingress into the ecu??
Thanks for your help guys, there's definately something wrong with my lpg kit i've covered a grand total of 74 miles and have burnt off around 23 litres of gas... 14.6 mpg mostly motorway :'( my trip computer is saying 26mpg average and I reset it this morning!! It's probably cheaper to just run it on petrol at the moment ::)
-
Should be mounted with the plug at the bottom ;)
If you can get along to the Bucks meet in a couple of weeks I'll we'll happily look it over for you and I'll have my laptop and lead with me ;) ;)
Thank you mate i'll see if I can make it :)
Is there any reason why it should be mounted with the plug at the bottom? Is it to avoid water ingress into the ecu??
Thanks for your help guys, there's definately something wrong with my lpg kit i've covered a grand total of 74 miles and have burnt off around 23 litres of gas... 14.6 mpg mostly motorway :'( my trip computer is saying 26mpg average and I reset it this morning!! It's probably cheaper to just run it on petrol at the moment ::)
Answered your own question there ;)
Yep, I reckon that's probably burning more LPG than it would petrol :o
I assume you've done all the basic checks? And get all over the LPG pipes with the Mk 1 Nose and check for leaks :y :y
-
The worse I've ever managed over a tank is 16mpg, and that was trying :o
-
The best I've ever managed over a tank is 16mpg, and a pair of rear tyres, that was great fun :)
Fixed that for you. :y............. :D ;D
-
The worse I've ever managed over a tank is 16mpg, and that was trying :o
I think mine is uber poorly :(
I've checked for leaks and tightened up all connections and I can't find any problems. I do think it is a fueling/mapping problem as the power & torque are much reduced when running on gas and the idle is quite lumpy especially when the engine's colder.
Should the stag ecu tap into my lambda probes? Or is that controlled by the injection pulses that are sent out by the engine ecu? As the wires for the lambda probes on the stag ecu are not connected... I may have just answered my own question again :D
-
The worse I've ever managed over a tank is 16mpg, and that was trying :o
I think mine is uber poorly :(
I've checked for leaks and tightened up all connections and I can't find any problems. I do think it is a fueling/mapping problem as the power & torque are much reduced when running on gas and the idle is quite lumpy especially when the engine's colder.
Should the stag ecu tap into my lambda probes? Or is that controlled by the injection pulses that are sent out by the engine ecu? As the wires for the lambda probes on the stag ecu are not connected... I may have just answered my own question again :D
Lamda connections only required to help the calibrator calibrate on that one...
-
The worse I've ever managed over a tank is 16mpg, and that was trying :o
I think mine is uber poorly :(
I've checked for leaks and tightened up all connections and I can't find any problems. I do think it is a fueling/mapping problem as the power & torque are much reduced when running on gas and the idle is quite lumpy especially when the engine's colder.
Should the stag ecu tap into my lambda probes? Or is that controlled by the injection pulses that are sent out by the engine ecu? As the wires for the lambda probes on the stag ecu are not connected... I may have just answered my own question again :D
Yep ::) ::)
The Stag software (in theory) doesn't need lambda inputs but you're asking for a whole world of trouble if they aren't ;) ;)
Get them connected up ASAP and if the performance is that badly affected I'd advise you not to use LPG until you've looked at it properly ;)
-
Ok i'll get them hooked up and see if it makes any difference. I think you're right I should only run on petrol at the moment... or 'liquid gold' as I like to refer to it ;)
I've got the stag software now, just need a lead!
-
Ok i'll get them hooked up and see if it makes any difference. I think you're right I should only run on petrol at the moment... or 'liquid gold' as I like to refer to it ;)
I've got the stag software now, just need a lead!
You can pick them up on eBay or through the supplier we use...
PM incoming ;)
-
Where is the software available, and what do I look for on fleabay please ? :)
-
Where is the software available, and what do I look for on fleabay please ? :)
Come on Albs get with the Programme TB's already supplied the link! ;D
http://www.ac.com.pl/en/
And just search the bay of e for 'Stag LPG Interface' :y
-
Where is the software available, and what do I look for on fleabay please ? :)
You don't bother as you wouldn't understand it :-X :-X :P :P ::) ::)
Anyway... You're close enough not to worry too much ;) ;)
But, as above... But the leads seem very expensive on the bay of e ::) ::)
-
No use being close if you cant remember to bring your laptop. ::) :P :-X
Where are the leads available cheaper than egay then ?
Just had a look on the bay - several different types by the look of it. Which one ? :-/
-
No use being close if you cant remember to bring your laptop. ::) :P :-X
Where are the leads available cheaper than egay then ?
Fair comment :-[ :-[ :-[ :-[
Through the supplier we use (think they're about £20+VAT) from him but don't quote me on that ::) ::)
Would you like me to try and add one onto my order if it wasn't shipped today? (as that will save you the postage cost ;))
-
Sounds like a plan. :) :y
-
Sounds like a plan. :) :y
I'll check the price tomorrow for you and if cheaper than egay (I'm sure it is) and on time I'll order you one :y
-
Good man. :y :)
-
Ok i'll get them hooked up and see if it makes any difference. I think you're right I should only run on petrol at the moment... or 'liquid gold' as I like to refer to it ;)
I've got the stag software now, just need a lead!
You can pick them up on eBay or through the supplier we use...
PM incoming ;)
Thanks buddy i'll give them a buzz today :y
Driving into work this morning on petrol made me realise just how badly the lpg system is performing! On petrol it's so much smoother and more powerful, it feels like effortless power whereas on the lpg it feels like a real effort. The MPG figures on my MID are also much improved, cruising up the M5 today was giving me an instant consumption of between 35 and 45 mpg :)
In conclusion, I desperately need a Stag lead so that I can plug into the ecu and see what the hell's going on!!
-
I'll check this again... What's the condition of the plugs, dispack and leads? LPG is more demanding on the HT system and it must be in top condition ;)
I actually think the problem is mixture related from your description but these things need to be checked properly ;)
-
looks like that ECU has been mounted upside down?
So should yours be. ;)........so should mine be, but currently it isnt. :-[
As in upside down I meant the loom plug should point down, as does mine ;) :y
-
I'll check this again... What's the condition of the plugs, dispack and leads? LPG is more demanding on the HT system and it must be in top condition ;)
I actually think the problem is mixture related from your description but these things need to be checked properly ;)
I'm not sure what condition the dispac and leads are in, I have replaced the plugs in an attempt to improve things but it didn't make any difference. I used NGK BKR6E's (single electrode, v-groove) and gapped them to 0.8mm.
I also believe it's in the mixture tbh. When the engine is cold it runs rough on lpg and can stall on idle. I think it may be running lean as when the engine is fully up to temp. it runs better. One other characteristic i've just remembered is when the engine fan kicks in, if the engine is idling the revs drop significantly and it switches back to petrol. I think this must be down to the extra current being drawn? If i'm driving and the fan kicks in I don't notice it.
Tunnie, my loom plug does point down? Do you mean the ECU plug should point down?? :-?