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Author Topic: LPG fitting SOuthampton  (Read 35904 times)

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Lazydocker

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Re: LPG fitting SOuthampton
« Reply #210 on: 17 February 2013, 12:23:02 »

Right, before you go any further look through the calibration guide again. Don't adjust the injectors by the %age level... It's a bodge!

What pressure have you set the reducer at (with the hex adjuster in the middle)? Ideally you want about 1.1 Bar. Then auto calibrate it. Then take it on the road. Ideally you want to drive the same route a few times... Once on petrol, then start collecting the LPG map. The lines drawn are averages and will move about but then click on the orange dots on the red line and move them up or down with the arrow keys. Move them in the direction you want the green, LPG line to move :y
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doz

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Re: LPG fitting SOuthampton
« Reply #211 on: 17 February 2013, 12:39:34 »

Gas pres. set at 1.08 which is the closest I could get it!! I hope you approve. I will map properly just waiting for my partner in grime and I have to pick a diff up this afternoon so it will be after that. I've got the guide doesn't seem so bad. I don't want to bodge it I was just curious and as it wasn't set up thought it was best to have a fiddle now. Will the mapping also pull the idle back like I did? The engine seemed so much happier when it was pulled back at idle
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Lazydocker

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Re: LPG fitting SOuthampton
« Reply #212 on: 17 February 2013, 12:46:57 »

Gas pres. set at 1.08 which is the closest I could get it!! I hope you approve. I will map properly just waiting for my partner in grime and I have to pick a diff up this afternoon so it will be after that. I've got the guide doesn't seem so bad. I don't want to bodge it I was just curious and as it wasn't set up thought it was best to have a fiddle now. Will the mapping also pull the idle back like I did? The engine seemed so much happier when it was pulled back at idle

You'll map it across the entire RPM range ;)
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doz

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Re: LPG fitting SOuthampton
« Reply #213 on: 17 February 2013, 12:53:47 »

Cool. That's what I wanted to know.  :y
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05omegav6

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Re: LPG fitting SOuthampton
« Reply #214 on: 17 February 2013, 15:25:52 »

LEAK FREE STINK FREE AND IDLING ON GAS  ;D ;D ;D

De-humidifier got rid of the stink. No gas leaks (different valve supplied with much longer thread in to tank) Auto Calibration done. Now to map  :y

Good news indeed :y
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jonny2112

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Re: LPG fitting SOuthampton
« Reply #215 on: 17 February 2013, 19:31:04 »

LEAK FREE STINK FREE AND IDLING ON GAS  ;D ;D ;D

De-humidifier got rid of the stink. No gas leaks (different valve supplied with much longer thread in to tank) Auto Calibration done. Now to map  :y

Good news indeed :y

Brilliant  :y
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doz

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Re: LPG fitting SOuthampton
« Reply #216 on: 17 February 2013, 20:22:39 »

Right I've mapped it and guess what? It runs like a bag of nails. Idles ok. Goes like stink ok but very small throttle openings has the engine running like it's dropped one or two cylinders. I've drilled the nozzles out to 2.2 mm. I've had the plenum off and checked all the wiring and it's all OK. I've even blown compressed air down to the manifold from the Gas solenoids (just down the pipe not down the solenoids) and nothings worked. So my last best guess before I get committed. Is gas hard on spark plugs? I have genuine 2 prong standard plugs. They look ok but are quite old. Possibility for small throttle openings? Goes great on petrol and on gas if you give it the beans it's just at around small throttle openings it seems to drop a cylinder or two
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Lazydocker

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Re: LPG fitting SOuthampton
« Reply #217 on: 17 February 2013, 23:00:01 »

Yes, LPG requires a good, strong spark and often highlights ht faults ;)

Have you checked for codes?

Feel free to give me a shout tomorrow ;)
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doz

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Re: LPG fitting SOuthampton
« Reply #218 on: 17 February 2013, 23:14:27 »

No codes. No Warning lights. Leads are relatively new. I'll give you a bell tomorrow after work. I share an office and hate making private calls. I'll grab a set of plugs and see what happens. At one point I had the Maps 99% identical. With the 2.0mm jets the ms on gas injectors was considerably longer than the petrol ones. At 2.2 mm they are almost identical. Last service before my ownership was October 2008 at 49K miles. I know it had new leads last year but the plugs are getting on for 5 years and 33k miles. So guess it's a good place to start.
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feeutfo

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Re: LPG fitting SOuthampton
« Reply #219 on: 17 February 2013, 23:52:08 »

It's best to fit new plugs anyway. :)

It's also very easy to trap the injector to nozzle pipes between the inlet and heads, even partially trapped pipes can cause issues. But if it calibrated ok then probably not that and its ignition related. :)
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feeutfo

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Re: LPG fitting SOuthampton
« Reply #220 on: 17 February 2013, 23:53:22 »

Good going though. :)
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Lazydocker

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Re: LPG fitting SOuthampton
« Reply #221 on: 18 February 2013, 19:25:12 »

Watching with interest for updates :y :y
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doz

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Re: LPG fitting SOuthampton
« Reply #222 on: 18 February 2013, 20:25:51 »

Nothing good to report I'm afraid. I've changed the firing order as you said and it now comes off a closed throttle better but still not right. I've tried to map it and have got the the lines almost perfectly overlaying one another yet the vibrations from the engine between 2-3 k rpm is enough to blur vision and cause bad scuttle shake at heavy loads. Once again if you clear the area it seem to go away if your accelerating harder. All seems to happen in the first quarter of the throttle travel which is what you use mostly to maintain a constant speed. I'm just wondering if I may have the wrong injectors selected. Could that cause it? I've also had a warning message. Not an error just a warning. I'm guessing this happened when I booted it at WOT. It said "Gas Injector fully open Check Lambda sensor in full engine load". Thing is both Lambdas are switching well and are almost equal in volts range so don't understand that one. Right these are the injectors. Only markings are "Motogas"



And the Ecu is configured for VALTEK Type 30/ RAIL IG 1/ AC GIAC 01 (3 ohm). Would selecting the wrong injectors give the issues I've got? In my quest to genuinely cock about. When I've been mapping I've moved the very first dot against the Multiplier scale. All the way from 1.6 down to 0.2. It makes no difference what ever I do the same problem persists. I am not prepared to throw anymore money at it just changing things on a wim and  as the car runs perfect on petrol I'm completely stumped. So my options are. Give it to a fitter and pay them to fix it. Pull the kit off and throw it in the bin. Sell car as is. Scrap the car. The third option is looking the favourite right now I've had a complete gut full and TBH if I don't get this sorted soon I'll have to part with it. Anybody want a Silver Elite with CID and LSD? Great on petrol. Total bag of shite on gas.............. sorry.
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tunnie

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Re: LPG fitting SOuthampton
« Reply #223 on: 18 February 2013, 20:30:12 »

I'd maybe think about getting to one of the LPG experts here? Worth cost in petrol easily?
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VXL V6

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Re: LPG fitting SOuthampton
« Reply #224 on: 18 February 2013, 20:32:45 »

Don't give in, there's lots of knowledge of this kit on here. You will get it sorted.  :y
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