volvo bi fuel and lambda sensor

[bordseye]

the lpg gas system is not working properly as the fine slits in the distributor have become part blocked with dirt - so the mixture at constant throttle is weak causing misfiring . however the engine management light has come on and diagnostics say this is a lambda sensor fault. engine runs well on petrol.

does anyone know if weak mixture and misfiring might trigger a lambda sensor fault code or indeed if a lambda sensor fault might trigger weak mixture and rough running. or are the two issues likely to be unrelated.

[TheEnd]

It's likely to be your misfires allowing more unburnt air through the engine, which it spots as a mixture problem.

[bordseye]

that was my suspicion