Bee utey, Zavoli Zeta Help again please

[It'sNotWorthComplaining!]

Hi Bee utey, you assisted me before, thanks mate.
I am replacing the D2 engine harness.
Whilst installing I need to cut and connect the petrol injector wires, that's not a problem I've tagged everything.

The Zeta system was running ok before.
But going through the connection scheme in the universal cable for 8 cylinder cars it shows the Black sheathed LPG injector cables are supposed to go to the left bank , passenger side sitting in car or right hand side looking into engine bay from front of car, Bank 1 ie cyl 1,3,5 & 7
and
Red Ringed sheathed LPG injector cables are supposed to be bank 2 cyl, 2,4,6,8.

Question:The lpg installer how fitted my system has got the RED Ring sheathed lpg injector cable connected to the bank 1 cyl 1,3,5 & 7

THIS IS A PIC OF HOW THE INSTALLER FITTED THE WIRING.
YOU WILL NOTICE THEY WORKED OF THIS DRAWING EXACTLY. STANDING AT FRONT OF CAR LOOKING INTO ENGINE BAY, CYL number 2 SHOULD BE ON THE DRIVER'S SIDE CLOSEST TO FRONT, ,
YET IS IS AT THE BACK WHERE NUMBER 7 SHOULD BE

If the diagram was rotated 180Degs , then it would be correct



Are they actually swapable and the programming is done via the injector ECU box?
As I said it ran ok previously on gas.
Just wanted to know for future reference because fault finding with be reverse to what the Zeta install manual says.
thanks in advance

[bee utey]

What is important is that the petrol injector being cut corresponds exactly to that cylinder's LPG injector. The gas ECU doesn't care which order they are wired in so long as all 8 are connected the same. There is no preferred no.1 injector, all are equivalent. The diagrams are recommended to be followed for ease of maintenance by another mechanic.

However, all that happens if the injector plugs are randomly swapped around is that during change-over from petrol to gas it would run rough as the injectors are swapped over 1 cylinder at a time, some would run rich and some lean as they overlap...

[It'sNotWorthComplaining!]

Thanks Bee utey,!

[It'sNotWorthComplaining!]

As if I don't have enough problems, solve on then another comes along. Today I smell gas leaking.
After the3 soapy water test I could locate the source of the hissing gas.
The Zavoli LPG solenoid Valve is leaking from the bottom.
It looks like it has a screwed on bottom plate ???
I haven't taken it of yet as coolant is too hot.
Maybe there is a seal that's leaking?

[bee utey]

Probably a shrunk o-ring. Pic of shut-off? There are a couple of gas locks I've seen go with the Zavoli converter, neither is Zavoli branded, so they are used by other manufacturers. Undo the cover, wait for the gas to stop hissing, size the o-ring and get another one.

[It'sNotWorthComplaining!]

Probably a shrunk o-ring. Pic of shut-off? There are a couple of gas locks I've seen go with the Zavoli converter, neither is Zavoli branded, so they are used by other manufacturers. Undo the cover, wait for the gas to stop hissing, size the o-ring and get another one.

You are right again LPG Guru!, The "O'Ring is the problem, and yes not Zavoli, it had a AMR solenoid fitted.
I found the right diameter 'O' in my kit of odds and sorts, but it was thicker, it did compress down ok, unless you need a special 0 rings for gas resistance

[bee utey]

You are right again LPG Guru!, The "O'Ring is the problem, and yes not Zavoli, it had a AMR solenoid fitted.
I found the right diameter 'O' in my kit of odds and sorts, but it was thicker, it did compress down ok, unless you need a special 0 rings for gas resistance

Funny, my wholesaler once said "you need special o-rings for LPG" and I said "why did the original one die then?" If in doubt get a green o-ring from an air cond R134A servicing kit. They are very good on LPG.

Some of the AMR valves were a bit dodgy, a spiral return lathe cut inside the filter cover o-ring pocket. If your fatter o-ring works then you're OK, otherwise you need another valve. It may be a warranty claim as its a manufacturing defect. I sent about 4-5 back for leaking.

[It'sNotWorthComplaining!]

Not able to claim warranty because system is years old, considering the thickness of the original o ring, why do I need to use one any way, couldn't a film of STAG jointing compound smeared around the o ring seat? do the same thing?

[bee utey]

Not able to claim warranty because system is years old, considering the thickness of the original o ring, why do I need to use one any way, couldn't a film of STAG jointing compound smeared around the o ring seat? do the same thing?

Look you can do whatever bodge you want, if an unlicenced bloke fiddles with a LPG liquid carrying component its up to him to watch what he's doing.

As for warranty, the rules that govern LPG components are a bit different, they are meant to hold gas for a long time. As a gas fitter I would have no hesitation in sending back a part that clearly doesn't fulfil the purpose it was made for. News items on gas cars blowing up are bad for the industry, so it will usually act with despatch to replace faulty items.

So specifically, if the o-ring pocket is badly machined, it should be replaced, if the o-ring is damaged from mechanics fiddling with it, get a service kit for the valve. Just my opinion.