Make sure the Lambda is running, the frequency valve on the right valve cover should be buzzing. Make sure there are no vacuum leaks, check the hole over the mixture screw for a plug, check the vacuum hoses to the control pressure regulator and the seals and hoses to and from the idle motor. Of course this assumes when you did the water pump you did all fo the hoses correctly. Check the hoses and electrical connector on the ignition advance. You may have to do a compression check, you may have overheated the motor more than you think, you might have popped a head gasket. When the car overheats, the temperature gauge can't sense the coolant so the motor gets hotter than the gauge would indicate. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "jamesrguk" <James_rg@xxxx> wrote: > List :- > > I have been having misfire problems for months and I am slowly > eliminating every possible cause. > > BACKGROUND & SYMPTOMS: > >