Icom tank 80% shut off valve malfunction

[Richard93Vogue]

Put my first refill into the new Icom vertical torroidal tank today and the 80% shut off valve didn't work. The pump at the servo just stopped pumping. Add to that the filler valve on the car froze open so as I unscrewed the filler gas came out and I got a slight cold burn on the hand.
Had to act quickly as the gas was coming back out of the tank so I screwed the pump handle back on and pressed and released it which had the desired effect of freeing up the valve on the car, and allowing my heart rate to change back down a couple of gears!!!!:eek:

I tell you what...I was a bit annoyed to say the least. And the darn thing still not tuned right.
I can't get the injector times right. It is missing at idle and all the way through till 3000rpm where everything opens up and it's all good, but can't drive like that for long!

[bee utey]

If this is your first fill, how did you fill it to get it going? If you used an upturned bbq bottle you 1. will have flakes of crud in your valves, 2. will have compressed air inside the tank which slows filling rates to below the flow rate to shut off. And the mixtures will vary between auto gas and propane.

As for mixtures, I fitted gas injection to a '94 4500 Cruiser yesterday and I fitted an oxygen sensor just for the diagnostic side of things. This allows me to read the mixtures while driving. Very worthwhile.

[Richard93Vogue]

This is the first fill I have done, but is the second fill the tank has had. Driven to the servo on petrol to do both fills.

I have bought some time ago now a couple of Range Rover oxy sensors to fit but have yet to get the time to fit them and don't yet have the proper tune resistor, although I am told that if I go to Jaycar with the correct resistance value I could just get one from there and solder in. Does that sound right?

Beeutey, I was toying with the idea of putting another lambda sensor in from the likes of a falcon or commodore in addition to the rover ones. The rover ones to inform 14cux and in tern the LPG, and the falcon one/s to hook directly to the LPG ecu which has capacity for 2 sensor inputs.
Doubling up I know but if the exhaust is out...that is the time to do it.

OR can I take more than one feed off the rover sensors? would that muck up the readings at all? (electricity is a bit of a mystery...)


I havn't read deep enough to know if the Marrelli system will be compatible with rover lambda sensors. I only say this as I know they are different in how they work.

Sometimes I feel as though I am dabbling in the dark arts, never really sure what is going to happen:D

[bee utey]

Open up your LPG software and look under sensor types. My system has selectable readout for all common sensors used, including LR original. The LPG system can only use the sensor reading for information to help you tune, not self adjusting the mixtures. Just fit the LR sensors and get them running, tap in the wire to the LPG and you'll be roight.

[Cannon]

This is how I tuned mine.

I've copied this from an email I sent to the suppler to see if I'd done it right.

He was happy that I'd done it correctly:


> Firstly cleared both gas & petrol maps & cancelled any corrections. > > I then did an autocal. Halfway through it said the 0.17ms correction > was not within parameters. > > I clicked OK & the AutoCal continued to the end. > > I then checked petrol timings on petrol & gas noticing that injectors > 5-8 had an increase in petrol timings when going from petrol to gas. > > Using the corrections button I adjusted timings for inj 5-8 until the > petrol timings no longer fluctuated when changing from petrol to gas. > > The timings ended up at 0.15 for inj 1-4 & 0.40 for 5-8. > > I read in the instructions that these corrections may be needed for V > type engines. > > Engine at this stage is running smoothly. > > Cleared petrol & gas maps again & went for a drive for about 15mins. > > Speeds for the course went from stopped to 110km/h. > > I then switched to gas & drove the same course with speeds & > accelerations as close as possible to the original petrol run. > > I then clicked calculate corrections, cleared the gas map & drove the > course on gas again. > > The gas map is now very close to the petrol map.

[Richard93Vogue]

Thanks for that, that is helpful to hear how you did it. It is about what I thought I should do from reading the manual. I have an added problem at the moment in that my kickdown cable for the auto is dodgey, I only have use of about 1/4 throttle at the mo, any more and it sticks.
Makes the mapping a bit hard! So will get that fixed....um......soon!

Tell me, what diameter did you drill your injector nozzles out to? I rang the supplier in England who told me to take them out to 2.5mm, which I have done.

[Cannon]

He told me to go 2.4mm.

4.0l high comp Thor.

[pibby]

I have bought some time ago now a couple of Range Rover oxy sensors to fit but have yet to get the time to fit them and don't yet have the proper tune resistor, although I am told that if I go to Jaycar with the correct resistance value I could just get one from there and solder in. Does that sound right?


richard - if you pull the resistor out the 14cux uses the closed loop fuel map. i had read this is the case but got the resistor anyways and tested. fuelling is the same with the NAS resistor and with no resistor. i've put led's in to read each oxy sensor or use a mm to test. if your lpg software is like mine then the oxy sensor readout is for your information while tuning, it is not used by the lpg ecu in its calculations.

brett