Adjusted tappets, now won't start!

[937carrera]

Go on then, I'll say it, you have checked that there is petrol in the tank ?

[T3luestar]

IT'S ALIVE! Checked and double checked wiring, all looked OK. Started and ran it on gas, switched to petrol and it died. I then switched back over to gas and the normal clicking from the back seemed to be more than usual. Switched over a few times while engine running and not running, then it suddenly just kept running when on petrol! It now all seems to be running and starting again.

[T3luestar]

Go on then, I'll say it, you have checked that there is petrol in the tank ?

[937carrera]

Glad you got it sorted. Experience is what tells you to check the basics again. I was working on an auto gearbox on a car on Monday when it started to misfire and run rough. Sounded like a coil pack had gone down...... but it was just running out of fuel.

As it's an injected engine then it sounds suspiciously like the signal to fire the fuel pump relay up wasn't working. But others may well have more experience than me in that regard.

Are you happy with the tappets now ?

[T3luestar]

Got a feeling it was just something simple, like a sticky switch /solenoid might have just been because of running on petrol for so long. It is due a service on the LPG, just need to find someone to do it.
Tappets are all good and won't be touched again!
Thanks for all the help.

[Mr Bean]

So if I read it correctly the actual fault didn't reveal itself.
Someone's going have a little gremlin man sitting on their shoulder on every trip who will fade into non-existence slowly over time.

[T3luestar]

Yep, it happened again this morning and I had to force start on LPG. Switched over fine whilst on the way to work, gas to petrol, petrol to gas without a problem. Let's see what happens at home time!

[T3luestar]

Seems to be happening all the time now and has to be force started on gas.

[oilrag]

I really am suspicious of your fuel (petrol) cut off relay being faulty ,or its wiring feed, can you test it without engine running ,but ignition switched on,,get an assistant switching over from gas to petrol whilst you are feeling/listening the solenoid for operation ,a dull click sound may also be heard,no click or knock,no worky ,no petrol .
I do realise this may of course already have been checked, but may be worth revisiting.
G.

[T3luestar]

I also think it must have something to do with this, but I have been working alone and I also have no clue about the LPG side of thing's! What exactly will it look like and how do I go about testing it?

[oilrag]

Ok
locate the petrol feed pipe to the carb ,it comes to the carb from the drivers side of the engine bay,somewhere along that pipe will be a cube ,about 30mm square,with 2 fuel pipes (in/out) and a pair of wires ,one earth ,one live feed ,(from changeover switch on your dashboard in cab). are you on mechanical fuel pump or electric ?
(most lpg conversions use electric petrol pump in my experience).
if so, elec fuel pump may be faulty or its wiring, also .
pm me if needed.
G

[T3luestar]

It's a 2.1 injection. Think I know what you mean though, it also has a filter on it?

[Mocki]

Shouldn’t be a petrol cut off solenoid on a injection, dePending on who did the conversion the lpg control will control the petrol pump relay , I would be looking in that area for a poor connection , especially as you have been working on that rhs of the engine under the air filter where the petrol pump wires go

[ajsimmo]

If it's been done properly it should default to petrol on in the event of an LPG fault, ie the LPG switch powers the relay to switch petrol off - no power, no switchy offy. So listen at ignition on. Is there a brief petrol pump on/off? If not, it's a fuel pump power feed problem. It could be the relay, or connections to it, so bypass it and try it again. If yes, it's the pump or filter, or fuel pressure regulator, or injectors, or earth problem, or ECU, but it's not the LPG.
I've just thought, maybe you have that really daft emulator and wiring loom gizmo to the injectors that some places fitted years ago because they usually do multipoint/sequential and didn't know any better. Have you got extra injector plugs/wires?

Sent from my ONEPLUS A3003 using Tapatalk

[T3luestar]

I can hear the fuel pump when the ignition is turned on and it seems to work. When the van was running in the week, it had trouble starting and wound stall almost straight away, I had to start on half throttle to get it going. I also found burnt wiring going to the relay, it's been replaced. The fuel filter hasn't been changed for a while, so I'll change that to rule it out.
The LPG was installed by Steve (RIP) at Gasure and there no extra injector plugs etc.
Thanks again for the help.