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Just trying to find a way to see on the lap top logs when its on petrol or gas?

You could look at the oxygen sensor signal as the levels (readings) will be different.

what model car is it ?

Only thing i can see is one doesnt lean off like the other at cruise? Still would love an idicator or sonething. Im going to have to hook up a light in the car its to confusing as its in a mazda van so no lpg symbol in the dash. And i dont thing the bcm simulator has a output for it

Its a vt ecu with a v6 conversions bcm simulator in a mazda van

yeah might be an idea to hook up a light to the gas relay or something.

Yeah i can manage something along those lines. But still surely there can be something added to the adx, the ecu controls the switching and send signals to the dash for a light in vt

In the last two bytes of the engine frame there are some LPG flags which can be added if you want to? Or will add them when I get a chance.

I thought they were in there already...
It is toward the bottom in the item list view of the .adx

if you find it isn't you can add them, the bit flags for the last byte in the engine frame is:

BIT0 = CHECK POWERTRAIN LAMP ON
BIT1 = LPG LOW PETROL CUTOFF ACTIVE
BIT2 = LPG FUEL MODE OUTPUT - PIN E1
BIT3 = LPG ANTI-THEFT OUTPUT OK - PIN E5
BITS 4-7 = SPARE

Do i add them to the bitmasks section? Sorry i havnt done any adx modifying before...