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[skippybanger]

i have a 2001 mv6 with lpg, when i run it on lpg if you put you foot down abit the engine light comes on, i dont the pedal test they came with 0300 0302 0301 0155 can anyone help me, also when running on petrol there is a slight misfire i took it to vauxhall the quoted me 3k for head gasket repair, since they quoted me that i have done a couple of trips of 300+ miles and in total done about 4k miles it never once over heated or lost water so i know thats rubbish just dont know what else to try it is only a very slight misfire so if anyone can help would be very good :-?

[TheBoy]

misfire on cyl 1 and 2.  Seeing as these are different banks, I doubt its coil packs, so check plug condition, and if plug wells full of oil.

Remember, LPG needs a better spark than petrol

[skippybanger]

ok cheers mate

[cem_devecioglu]

just an idea..LPG injectors order connected properly ?

[stuyg]

your lpg kit also has an ecu which will store codes.if the lpg is running to rich or lean the lpg emulater will be giving the cars ecu the wrong signals.  

[feeutfo]

i guess this is a lesser issue?
http://www.obd-codes.com/p0155
No mention of head gaskit strangely!
Ffs, they almost talk as much bollix as estate agents.

[Kevin Wood]

O2 sensor heater circuit is worth investigating. Check the wiring to the O2 sensor and perhaps measure the resistance between the heater pins on the sensor itself (normally the two white wires). If an O2 sensor has packed up it might go some way to explaining the fault.

I think in garage parlance "head gasket" means "I haven't got a rather clue but if I take it all apart and put it back together it's bound to mysteriously fix itself and net me a fortune in labour charges.".  

Kevin

[cem_devecioglu]

O2 sensor heater circuit is worth investigating. Check the wiring to the O2 sensor and perhaps measure the resistance between the heater pins on the sensor itself (normally the two white wires). If an O2 sensor has packed up it might go some way to explaining the fault.

I think in garage parlance "head gasket" means "I haven't got a rather clue but if I take it all apart and put it back together it's bound to mysteriously fix itself and net me a fortune in labour charges.".  

Kevin

definitely..

[zirk]

Dont know that much about LPG, but with experience with a LPG Vectra the Engine needs to be running spot on with petrol, as any minor problems when running on petrol will show up twice as bad on LPG.

Get it running sweet on petrol before diving in to any possible LPG faults.