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Author Topic: Stag LPG system  (Read 11795 times)

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joff

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Re: Stag LPG system
« Reply #15 on: 09 July 2014, 17:34:30 »
Any chance you could post it over, I'll PM the address :y
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Entwood

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Re: Stag LPG system
« Reply #16 on: 09 July 2014, 17:34:38 »
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05omegav6

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Re: Stag LPG system
« Reply #17 on: 09 July 2014, 18:04:53 »
Can collect and bring with on Wednesday if that helps any...
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joff

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Re: Stag LPG system
« Reply #18 on: 09 July 2014, 18:59:26 »
Quote from: Taxi Al on 09 July 2014, 18:04:53
Can collect and bring with on Wednesday if that helps any...


That could work :y
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TheBoy

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Re: Stag LPG system
« Reply #19 on: 09 July 2014, 19:31:14 »
Download software from the manufacturer, not some pikey outlet ;)

http://www.ac.com.pl/en/doc/383/ac-software
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Entwood

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Re: Stag LPG system
« Reply #20 on: 09 July 2014, 21:31:02 »
Quote from: TheBoy on 09 July 2014, 19:31:14
Download software from the manufacturer, not some pikey outlet ;)

http://www.ac.com.pl/en/doc/383/ac-software

OK .. got that as well .. version 10.4.0.2 .. ta muchly  :)
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TheBoy

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Re: Stag LPG system
« Reply #21 on: 11 July 2014, 07:58:55 »
Quote from: Entwood on 09 July 2014, 21:31:02
Quote from: TheBoy on 09 July 2014, 19:31:14
Download software from the manufacturer, not some pikey outlet ;)

http://www.ac.com.pl/en/doc/383/ac-software

OK .. got that as well .. version 10.4.0.2 .. ta muchly  :)
Depending on the actual ECU, you may need the old one. There are many variants of Stag 300, and to confuddle matters, some are software upgradable to the different variants, some are fixed to how they left the factory.
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Entwood

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Re: Stag LPG system
« Reply #22 on: 16 July 2014, 14:25:09 »
Well we got it working .. sort of ... eventually !!

Difficulty 1. It needed a driver for the modules - eventually found, downloaded and installed.
Difficulty 2. It needed v1.x.x.x software - eventually found, downloaded and installed
Difficulty 3. We didn't have a clue what we were doing with the software, and all we got were injector errors
Difficulty 4. We spotted all the injectors were unplugged - corrected, errors went but still wouldn't switch to LPG
Difficulty 5. See Difficulty 3 part 1. :)
Difficulty 6. After a whole load of playing with settings (at random) it suddenly went into LPG mode :)

On a now serious note ... it was then possible to work out what each setting actually did - learning as we went. It was running on LPG but had a definite hesitation/misfire, after a while 2 injectors on the passenger bank stopped working, and it ran rough on petrol as well. Check the codes (emissions light apparently removed !!) and misfires for that bank stored (I'm guessing the ECU shut down the bad cylinders). Once cleared it ran fine on petrol. Switch to LPG and initially runs sweetly, but after a minute or so the roughness appears.....

When running we noted that the injector timings for banks 1 & 2 were surprisingly different ... bank 1 around 2.7mS per injector, bank 2 around 4.3mS per injector

We noticed that the lambda figures for L1 & L2 in the LPG software were both identical at 0.34V and didn't change at all. Checking the Lambda voltages with the reader there was a MARKED difference between Bank1 at 0.8V and Bank2 at 0.04V running on LPG .. running on petrol they are about the same. Switch to LPG and after a few seconds they change to a big split and the roughness appears.

Suspicion is the Lambda wiring for the LPG ECU is wrong ???

Present plan is Joff will examine the wiring for anything obvious, otherwise he hopes to take it to the Oxford meet where (if possible) a tech2 will give better live data, and someone who knows what they are doing can look at the settings. I'll take the laptop and TB's cable so it can be plugged in......

Question is .. have we missed anything obvious ??? (other than the injectors being unplugged ... DOH!!!)

:)
« Last Edit: 16 July 2014, 14:28:50 by Entwood »
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Kevin Wood

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Re: Stag LPG system
« Reply #23 on: 16 July 2014, 14:39:48 »
Excellent progress. At least you are able to see what is going on now. :y

Is it one of the later Stag ECUs that supports self-mapping (and if so, have you tried turning self mapping off)?

Other than that, the Stag ECU doesn't use the Lambda sensor inputs, they are just there for information.

You can switch individual cylinders back to petrol by clicking on their symbols at the bottom right of the screen. Can you use this to isolate a troublesome cylinder that's causing the fuel trims to diverge?
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chrisgixer

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Re: Stag LPG system
« Reply #24 on: 16 July 2014, 15:30:42 »
Need to fix the eml so you can pedal trick the codes at the very least for on going diags.  Or get a code reader on it, you'll get missfires codes, as the ecu shuts down each pot as E says. Re start and it re sets.

So at a guess, misfires caused by poor fueling, caused by incorrect nozel size or wrong or failing injectors on gas.

It needs setting up basickly. Fuel trim errors would confirm that? Hopefully.

I can bring my lapy and to Oxford for a fiddle ;) if you like. :)
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joff

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Re: Stag LPG system
« Reply #25 on: 16 July 2014, 16:38:30 »
Big thank you to Nige today, and yes Christ if you could bring your laptop to Oxford that would be brill. It must of been OK at one point in the last four years that it has been on the car :-\ Also nice to see Al today and thanks for taking the bumper over :y
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Entwood

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Re: Stag LPG system
« Reply #26 on: 16 July 2014, 16:41:49 »
Quote from: joff on 16 July 2014, 16:38:30
Big thank you to Nige today, and yes Christ if you could bring your laptop to Oxford that would be brill. It must of been OK at one point in the last four years that it has been on the car :-\ Also nice to see Al today and thanks for taking the bumper over :y

That's one hell of a promotion for the lad from Reading ...  :)
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joff

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Re: Stag LPG system
« Reply #27 on: 16 July 2014, 17:44:24 »
Quote from: Entwood on 16 July 2014, 16:41:49
Quote from: joff on 16 July 2014, 16:38:30
Big thank you to Nige today, and yes Christ if you could bring your laptop to Oxford that would be brill. It must of been OK at one point in the last four years that it has been on the car :-\ Also nice to see Al today and thanks for taking the bumper over :y

That's one hell of a promotion for the lad from Reading ...  :)


That's gay pad for you (note to self must preview first) ;D ;D ;D if he can get it running on all six on Sunday (on LPG) I will call him God if I have to. :y
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chrisgixer

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Re: Stag LPG system
« Reply #28 on: 16 July 2014, 20:59:38 »
Bless you my child.


I'll see if I have any miracles left. :D



...suspect it will be more involved than a tickle with a lappy though.
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05omegav6

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Re: Stag LPG system
« Reply #29 on: 16 July 2014, 23:38:22 »
Quote from: joff on 16 July 2014, 16:38:30
Big thank you to Nige today, and yes Christ if you could bring your laptop to Oxford that would be brill. It must of been OK at one point in the last four years that it has been on the car :-\ Also nice to see Al today and thanks for taking the bumper over :y
No problem at all :y All fitted nicely now... Good to see faces old and new today too 8) Only 150 miles to go, and then it's bed time ::)
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