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[neddy]

My 01 2.2 auto with LPG had a no 3 pot missfire over two years ago, replaced the Coil pack and plugs and cleared the snag. recently the same snag re-occurred Code 0303 on my code reader also a P1700 code, replaced plugs and coil pack (ebay brand new Bosch - £76.49 inc from Vauxcentre  super service - v pleased) Fitted bits today and snag remains. Oh dear me!!!
Have any of you any ideas please.

[Gaffers]

plugs/leads?  :-/

[PhilRich]

Just to make sure you don't have a duff new plug, swap the one on the 'faulty' cylinder with one of the other 'working' ones, clear the fault code & run the motor. Then see if the fault returns? :-/
I take it as read that there is no sign of oil in the plugwells?

[neddy]

Thanks for the reply's, coil pack on 2.2 changed, no leads fitted, new plugs fitted and swapped them over just in case. to me it seems so strange that it is always no 3 pot which has the snag, all the plugs show the same colour, I've used NGK BKR6EK plugs for the last 8 years, all the compressions are close and consistent. Why after a long period or faultless running has the same snag re-occurred - it beats me.
All ideas welcomed - I'd hate to get rid of an old friend....

[neddy]

Sorry missed the bit about oily plug 'oles. All are dry, camshaft gaskets changed during last saga and there are no leaks. Cheers neddy

[neddy]

Philrich - just spotted your home address - I grew up near Richmond, Yorks and on hols a week ago visited Redcar and Saltburn, had a great day remanising, car was running well then.
The Post Police will have me for this entry - sorry!!

[neddy]

Oh dear the problem seems to have stumped every one else as well.........