lpg system control from MS? can it be done with stock code?
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Read the manual to see if your question is answered there before posting. If you have questions about MS1/Extra or MS2/Extra or other non-B&G code configuration or tuning, please post them at http://www.msextra.com The full forum rules are here: Forum Rules, be sure to read them all regularly.
Another suggestion to control LPG system by MS - use a dual table code like MSnS-E, and feed the signal from the switch to the table-switching input of your choice on MS. That way you can easily use different VE tables for different fuels.
Just my 2 cents...
Just my 2 cents...
Arny
EFI maniac, BMW fanatic
- '84 BMW 528i I oughta squirt...
EFI maniac, BMW fanatic
- '84 BMW 528i I oughta squirt...
-
Phillblanchard
- MegaSquirt Newbie
- Posts: 7
- Joined: Tue Sep 27, 2005 3:43 am
- Location: Mold, North Wales, UK
Hi mitsuko!
Ive been mad busy since i last posted on here and basically want to thank you and the others on here for the ideas and help
the rangie is running fairly well, i hadnt fitted a volume restrictor in the gas line from the reducer, so it was dumping a shitload of gas into the engine!! lol
wondered why the milage was so crap!
anyhow, i fitted one and got it running more econo mode style (10mpg around town).
think ive got it pretty much sorted now, the only gripe is performance.
when cold, and on petrol, it goes like a missile!! on lpg and cold its very moderate.
when warm, performance on either fuel seems worse again. not lots worse, but you do notice the difference.
maybe need to tweak the mixture a little on MS. Can i use the lambda to tune in the lpg? in the normal 0.5v cross over way or do i have to run it richer?
im currently running 10 degs advance too.
Regards and much thanks,
Phill
Ive been mad busy since i last posted on here and basically want to thank you and the others on here for the ideas and help
the rangie is running fairly well, i hadnt fitted a volume restrictor in the gas line from the reducer, so it was dumping a shitload of gas into the engine!! lol
wondered why the milage was so crap!
anyhow, i fitted one and got it running more econo mode style (10mpg around town).
think ive got it pretty much sorted now, the only gripe is performance.
when cold, and on petrol, it goes like a missile!! on lpg and cold its very moderate.
when warm, performance on either fuel seems worse again. not lots worse, but you do notice the difference.
maybe need to tweak the mixture a little on MS. Can i use the lambda to tune in the lpg? in the normal 0.5v cross over way or do i have to run it richer?
im currently running 10 degs advance too.
Regards and much thanks,
Phill
What you should do is run the car , with a warmed up engine , on lpg at
3,000 rpm . No load on the engine .
Then make adjustements to the restrictor to find the oxygen sensor
stoich point . Trip point at 0,5V with a narrow band .
You can watch the gauges in megatune to .
Next take it on the road , 3,000 rpm at cruising speed .
Look at the oxygen sensor again and adjust the volume restrictor
to the toggle point. This could take several runs to find it ,as you can't adjust the restrictor while driving , can you .
When you've found the trip point , adjust the restrictor 1/8 to 1/4 turn to the rich side . That ought to get you a decent performance vs fuel economy .
Pat
3,000 rpm . No load on the engine .
Then make adjustements to the restrictor to find the oxygen sensor
stoich point . Trip point at 0,5V with a narrow band .
You can watch the gauges in megatune to .
Next take it on the road , 3,000 rpm at cruising speed .
Look at the oxygen sensor again and adjust the volume restrictor
to the toggle point. This could take several runs to find it ,as you can't adjust the restrictor while driving , can you .
When you've found the trip point , adjust the restrictor 1/8 to 1/4 turn to the rich side . That ought to get you a decent performance vs fuel economy .
Pat