EFI/LPG controller, Info Wanted

[jackz]

Does anybody Know who makes these LPG/EFI controllers?
Unit is fitted to an '87 rangie in '02.
Looking for info regarding operation and wiring diagrams.:confused:
http://img4.imageshack.us/img4/5852/dsc00577email.th.jpg (http://img4.imageshack.us/i/dsc00577email.jpg/)

[langy]

I've just gone through similar with my RR and re-wiring the LPG switch and solenoids.

Unless you find a brand name, it will be a bit difficult. Even with the makers website it was a problem finding a wiring diagram.

However, provided it's a 'simple' gas system (ie non-electronic gas mixer) the wiring should be similar:
1. 12v feed from ignition (Red)
2.Ground(black)
3. Feed to gas tank sender (green and white)( maybe two wires to one end of the sender)
4. feed from coil to dash unit (brown)(for cutoff if you stall for whatever reason- could be adjustable via trimpot at rear of dash unit)
5. Gas feed cutoff solenoids (blue)( I use a relay as there are 4 to power)
6. EFI cutoff (?)( varies with installer - mine interrupts the overspeed/vac safety relay under the MAF - run off the cutoff solenoids)
7. Power to petrol cutoff relay (yellow)( Mine cuts the fuel pump power when on gas)

Within your dash unit may be a delay circuit like the interior light - mine starts on petrol for about 3 secs whilst the gas circuit is also on too, but the delay is a relay next to the converter.

Of course your system could be completely different.

[bee utey]

The switch/gauge is an APEXUS brand, should have all terminals marked on top of the box. The other unit is a petrol start relay, have seen them before but not new, they operate the petrol injectors for a short time everytime the LPG is switched on. It is probably wired up in parallel to the terminals on the switch/gauge. It has an adjustment screw to set the time the petrol output is on. You can see this by watching the petrol light when you hit LPG.