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[feeutfo]

If I persist with calibration it gives a warning collector pressure , 0.62 is too low, even though 1.40 is showing on the screen, I realize 1.4 is too high, but I'm trying to match the warning figure.

Adjusted vap pressure but went too far, warning said too high at 1.53 adjusted back by less turns and gone back to 0.62. Which doesn't correlate to the adjustment made. It makes no sense.

Still seeing different warning reading to what it shows on screen.

Petrol ecu is cutting petrol injectors so have to restart engine.

I is fuddled.  :-/

[feeutfo]

Turning on LPG to each injector in turn , injectors 4+5 run lumpy, all other seem fine. Maybe not calibrated yet? Calibration has yet to complete as it runs so badly. 

[Kevin Wood]

Turning on LPG to each injector in turn , injectors 4+5 run lumpy, all other seem fine. Maybe not calibrated yet? Calibration has yet to complete as it runs so badly. 

If it runs smoothly on some cylinders with LPG, it should run the same on all the others (one at a time on LPG), and the uncalibrated settings won't be so far off that one cylinder will make it all go to pot.. There's something up with 4&5, IMHO. Swapped somewhere, maybe?

I did the same with mine, symptoms the same. As soon as you switched either of the swapped cylinders to LPG it all went to pot. One cylinder gets no fuel while the other gets petrol and LPG. Result: engine damn near stalls.

Try swapping the LPG injector wires 4&5 and see if that changes the symptoms?

Kevin

[feeutfo]

I know what's wrong! KW has bunged TB a few quid to knobble my install in order to get me to paint Kev's house by way of payment for correcting TB's error. It's all scam! 

[feeutfo]

Turning on LPG to each injector in turn , injectors 4+5 run lumpy, all other seem fine. Maybe not calibrated yet? Calibration has yet to complete as it runs so badly. 

If it runs smoothly on some cylinders with LPG, it should run the same on all the others (one at a time on LPG), and the uncalibrated settings won't be so far off that one cylinder will make it all go to pot.. There's something up with 4&5, IMHO. Swapped somewhere, maybe?

I did the same with mine, symptoms the same. As soon as you switched either of the swapped cylinders to LPG it all went to pot. One cylinder gets no fuel while the other gets petrol and LPG. Result: engine damn near stalls.

Try swapping the LPG injector wires 4&5 and see if that changes the symptoms?

Kevin

Yes tried that, made no odds. Baring in mind I had already checked all the wiring colurs against a stag wiring diag, I'm not sure where to look next.

I had the thought that maybe the wires are swapped at the LPG ecu plug end...   .... But I'd be inclined to get a grown up to check my colour blind dyslexic altzhiemer infected work first before going there of course

[Kevin Wood]

Not got a LPG injector pipe trapped / kinked under the plenum, I suppose? :-/

Can you swap one of the LPG injectors from a "faulty" cylinder onto one that's happy on LPG?

Another thing to check. Have a look at the piggy-back connectors and make sure the correct pins are wired up. The black wire on the piggy-back should be connected to the common wire on the injector in each case (and I think that's red with a blue stripe on the Omega's loom). Just possible one of them has been wired with the 2 pins swapped?

You should also be able to trace the wires back to the pins on the ECU connector with a multimeter on ohms. Remove the plug from the LPG ECU and buzz them through. I think the pin connectors of the LPG ECU are in the latest Stag manuals.

[Kevin Wood]

Failing that bring it over? I can spare an hour or two tonight but out tomorrow, as said.

[albitz]

Not got a LPG injector pipe trapped / kinked under the plenum, I suppose? :-/

Can you swap one of the LPG injectors from a "faulty" cylinder onto one that's happy on LPG?

Another thing to check. Have a look at the piggy-back connectors and make sure the correct pins are wired up. The black wire on the piggy-back should be connected to the common wire on the injector in each case (and I think that's red with a blue stripe on the Omega's loom). Just possible one of them has been wired with the 2 pins swapped?

You should also be able to trace the wires back to the pins on the ECU connector with a multimeter on ohms. Remove the plug from the LPG ECU and buzz them through. I think the pin connectors of the LPG ECU are in the latest Stag manuals.

That was the problem with mine. It ran like a pig until it was fixed.

[PhilRich]

Not got a LPG injector pipe trapped / kinked under the plenum, I suppose? :-/

Can you swap one of the LPG injectors from a "faulty" cylinder onto one that's happy on LPG?

Another thing to check. Have a look at the piggy-back connectors and make sure the correct pins are wired up. The black wire on the piggy-back should be connected to the common wire on the injector in each case (and I think that's red with a blue stripe on the Omega's loom). Just possible one of them has been wired with the 2 pins swapped?

You should also be able to trace the wires back to the pins on the ECU connector with a multimeter on ohms. Remove the plug from the LPG ECU and buzz them through. I think the pin connectors of the LPG ECU are in the latest Stag manuals.

That was the problem with mine. It ran like a pig until it was fixed.

Took me 3 weeks to deduce some t**t had crosswired one of the lpg injectors on the loom!   I very nearly went bald!!

[TheBoy]

I know what's wrong! KW has bunged TB a few quid to knobble my install in order to get me to paint Kev's house by way of payment for correcting TB's error. It's all scam! 

You found the gravel yet?


Joking aside, the evap gas pressure issue sounds odd.  If Kevin is around at any point in next few days, that might be a worthwhile option.

We never swapped back the sensors we swapped on Sunday iirc? That said, mine was running fine before, and runs well now...

[TheBoy]

I believe Lazydocker said its not unknown for the looms to be wrong, might be worth metering that out?

[Kevin Wood]

Remember the vapour pressure is measured relative to the manifold vacuum. If the engine is running on 4 and struggling to idle the manifold vacuum will probably be all over the place, so the vapour pressure will too.

If the injectors are not consuming vapour the pressure will also not have anywhere to go, so it will tend to peak when the manifold vacuum is low, and never come down again. I'd say don't worry about that at the moment. Concentrate on working out why there are a couple of pots that don't run on LPG whilst the others will (so vapour pressure can't be far wrong). Once that's resolved you might just find you've been chasing a red herring.

[Lazydocker]

Not got a LPG injector pipe trapped / kinked under the plenum, I suppose? :-/

Can you swap one of the LPG injectors from a "faulty" cylinder onto one that's happy on LPG?

Another thing to check. Have a look at the piggy-back connectors and make sure the correct pins are wired up. The black wire on the piggy-back should be connected to the common wire on the injector in each case (and I think that's red with a blue stripe on the Omega's loom). Just possible one of them has been wired with the 2 pins swapped?

You should also be able to trace the wires back to the pins on the ECU connector with a multimeter on ohms. Remove the plug from the LPG ECU and buzz them through. I think the pin connectors of the LPG ECU are in the latest Stag manuals.

That was the problem with mine. It ran like a pig until it was fixed.

Took me 3 weeks to deduce some t**t had crosswired one of the lpg injectors on the loom!   I very nearly went bald!!

But I told you several times to check it before you did

[Lazydocker]

I believe Lazydocker said its not unknown for the looms to be wrong, might be worth metering that out?

Yep... Rare but not impossible