Can I kindly ask the mods to keep this thread in this section purely to gain as much attention as possible. If its down the bottom in the correct section no-one will see it!

I need some help with my 2001 V6 Galant Estate. Manual. I have a misfire that I just can not find the cause of! I have a lambda sensor fault code (S1B1) that will not clear!

I can pay anyone a decent amount who has extensive knowledge to come and try and help me fix this!

Things I have replaced,

Spark plugs,
Leads,
Distributor cap,
Fuel filter,
Checked vacuum hoses,

That's it so far I think!

The lambda sensors have all been replaced! All the wiring has been checked, the power going to the lambda sensor is correct!
I have changed the ECU and ignition barrel, just to rule that out,

Im really at a loss here I have done a lot of work to this car and I dont want to see it go down the drain!!

Any help is so welcomed!