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[megaomega123]

No recent work except the xenon level sensor front wishbone. No settings were changed prior to the problem arising. Plenty have been changed now trying to rectify, its got slightly better as opposed to worse. The filter was changed after the bad running but made no difference. As said previously, I suspected filter due to the way it was running - periods of fuel starvation then fine.

[Lazydocker]

Did this all start fairly suddenly or was there a gradual deterioration in it?

How old is the conversion?

[megaomega123]

started pretty much suddenly. Having had a think, I remember also putting in some redex for emission before MOT. It started soon after but I cant see that being a link or cause.
Installation only about 18 months in.

[Lazydocker]

Did you fill up with gas anywhere different?

Doesn't explain the strange RPM signal but could have caused rough running

[megaomega123]

Got my gas from the same 2 places, no previous issues.

How easy is it to get to and check and clean the injectors? I take it there are no pressurization issues to deal with as I changed the filter with no need of depressurizing.

[Kevin Wood]

Got my gas from the same 2 places, no previous issues.

How easy is it to get to and check and clean the injectors? I take it there are no pressurization issues to deal with as I changed the filter with no need of depressurizing.

I've never actually needed to take these injectors apart but apparently they can be serviced. Firstly, though, try switching individual cylinders to gas using the Stag software to see if you can pin down which of the cylinder(s) is causing a problem. If it's not possible to pin it to a single cylinder I doubt it's an injector problem, TBH.

.. and there's still the erroneous RPM indication. Can you perhaps post a screen shot of the configuration screen from the Stag software? IIRC, there are a couple of parameters related to the  RPM input.

Another option might be to save all the settings and the shape of the map graph (taking screenshots seems to be the best way - saving the settings doesn't work!) then do a factory reset on the LPG controller and reconfigure it from scratch. Just maybe it has got its' knickers in a twist somehow.

Another thing to check is the security of the supply connections to the LPG ECU (IIRC we wired them straight to the battery terminals on this one). If the negative has worked loose it might explain the bad RPM signal.

Kevin

[megaomega123]

I am sorry I wasn't aware that you had installed this with James. I haven't got laptop access until the weekend but will certainly post some screen shots.
I accidentally reset factory settings a while back and had to go from scratch. The difficult part was on the settings screen where the components are defined. I couldn't find the components or corresponding number i.e ps-01 so that was guess work until it ran smooth.

Ill take a look at the wiring connections shortly and ensure all are tight and intact and post back after.  

[megaomega123]

Ok just had a little look around here and battery connections ok except there was one single thin wire with a blade connection not connected to anything. Found the corresponding blade on a 2amp fuse, so connected these with no change.
There is a definite smell of gas coming from the passenger bank, it wafts up around the ICV area. There is no smell on the other bank. I think this may suggest a leak. Where is the most likely place for a leak to occur in that area?

[SteveD]

Had a similar symptoms with a Stag ECU on an AMG Merc. We added an extra earth to the ECU casing which fixed it for a couple of months. The problem in the end was a faulty ECU  :-/

[megaomega123]

Had a similar symptoms with a Stag ECU on an AMG Merc. We added an extra earth to the ECU casing which fixed it for a couple of months. The problem in the end was a faulty ECU  :-/

I could add an earth as it is just sat in the scuttle and not mounted to body. Not to good on electrics! Is it just a case of adding an earth lead to the ECU casing then to a suitable ground point?

[SteveD]

Yep, stick a nut & bolt through the fixing hole on the ecu with a wire straight to a good earth on the body work.

... might be worth waiting for the gas smell to go before you start!

[megaomega123]

Thanks, it wont do any harm. Just the suspected leak to deal with now.  

[Kevin Wood]

Thanks, it wont do any harm. Just the suspected leak to deal with now.  

The leak is confusing me. Nothing LPG down the passenger side at all.  Just the injectors mounted on the top of the plenum IIRC.

Kevin

[megaomega123]

Thanks, it wont do any harm. Just the suspected leak to deal with now.  

The leak is confusing me. Nothing LPG down the passenger side at all.  Just the injectors mounted on the top of the plenum IIRC.

Kevin

Yeah, it's just the injectors and the pipes running down under the plenum.

[megaomega123]

I can smell gas in the car too, which is obviously coming in through the vents. Only passenger bank is smelling!!