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[Welung666]

I've had Arlee219 over this afternoon with his 2.2 LPG for some investigative works. Symptons are... on petrol, lumpy tickover and will eventually die. On gas, pretty much fine but the occasional missfire. We got the code reader on it on petrol and got:-

P0100 MAF
P0170 Fuel Trim bank 1
P1700 TCM

On gas we got:-

P0100 MAF
P1700 TCM

The LPG wiring at the first lambda is a bit on the bodgy side but all seems intact. Defo needs a new MAF and air filter so he's going to change them. As for the Fuel trim problem, I found that the flexi joint in the cats is seperating so that could be causing the P0170. No ideas on the TCM tho.

His other problem is on the coolant system. Loosing about a pint every 3 days but no obvious leaks. Once warmed up the system is getting highly pressurised to the point that you can't squeeze the large rad hoses. Coolant is clean and doesn't smell of anything other than coolant. Any suggestions as to why it's pressurising that much?

[arlee219]

Hi Welung666
Thanks again for doin all the checks this afternoon.
I'm still thinking about that coolant thingy.
Is it possible that it's faulty headgasket that is causing the problem (could be either a seal or a broken head)? I've read some more articles about it and the fault results in all symptoms that fit my case:((((
I've spoken to firend of mine and he's had a similar problem some time ago. Also he's told me, that it'd be worthy to clean the head (there is a technical term for this type of operation, but unfortunately I couldn't find a proper translation of the word - the process involves turning it down a bit).


And just one more thing Wellung - what was the name of that netty part of the exhaust?

[The Cambelt Kid]

Do you mean head skimming?

I had similar faut on my 2.0 LPG, was lumpy on LPG at first and after a while it started to effect petrol too.  It turned out to be HT leads.  LPG tends highlight HT issues more than petrol.

You car has coil per plug, so maybe the coil pack it not functioning correctly?

[feeutfo]

Any water in the oil?

[arlee219]

Any water in the oil?

have no idea, but we checked water tank - no trace of either oil or petrol.

[arlee219]

Do you mean head skimming?

I had similar faut on my 2.0 LPG, was lumpy on LPG at first and after a while it started to effect petrol too.  It turned out to be HT leads.  LPG tends highlight HT issues more than petrol.

You car has coil per plug, so maybe the coil pack it not functioning correctly?

About that - haven't the foggiest...

...and yes - "skimming" is the word I was lookin' for.
Would you say that this is the cause of the water problem?

[arlee219]

One more thing
I've been to the gas station yesterday and a chap there asked me if I wanted to use some red lubricant for the joints (what joints I don't know), as the gas makes them dry. I had no idea what he was talkin' about, so I said - "no, thanks bud". He also added, that a lot of taxi drivers are using it.
Does anyone have any idea what was he talkin' about?

[arlee219]

ok
got new MAF, and the problems with unability to run on petrol are all gone

now the time has come for getting something about the water system done.

[Welung666]

ok
got new MAF, and the problems with unability to run on petrol are all gone

now the time has come for getting something about the water system done.

Glad you got the MAF issue resolved Ade

[al brown]

Have a good check for leaks while the car is warming up. Dont get too hung up about not being able to squeeze the pipes when the car is hot, you can't compress fluid and it is trying to boil but cant because of ther system pressure (same as pressure cooker), so it will be hard to squeeze the pipes.
That said, it shouldnt cost a lot to get a garage to snoop the system for you. It only take a few minutes.
Al

[arlee219]

but the thing is the high pressure in the pipes stays for a long time after the engine's switched off
there's no visible leaks, and I have performed a couple of test with the cloth and card board located at different places - absolutely nothing! Still Wellung666 mentioned something about system being overpressured.
I'm trying to find a reason...

[feeutfo]

Any water in the oil?

have no idea, but we checked water tank - no trace of either oil or petrol.

Have a look. If yes HG failed.

[mathewst]

Arlee about gas and lubricant. I know that some cars that have lpg installed must have aditional lubrification systems installed also so I guess the guy at the gas station was refering to this ( but I'm not sure). I ve read somewhere that those cars use lubrificators called Duralube or something similar. If this isn't done it can cause problems with valves, headgasket etc... I hope I was a bit hlepfull but I'm sure someone will correct me if I was wrong.
Also that problem with gas and petrol, not sure but know that the phase of ignition of petrol and gas is different ( different octane values), and it had to be set manually on older cars. Newer cars should correct this automatically but maybe yours doesn't. Hope someone will be able to help you more

[feeutfo]

if HG failed it will run like a bag of pants. No point proceeding until confirmed.

Re Duralube for lpg its not needed on the Omega. I know another member has it fitted but only because it came with the kit. Dont think anyone else has it on here, i dont.