>>it still seems to be
>>it still seems to be running rich,>>
Beyond the static idle mixture setting, the mixture is controlled by the Aux. Press. Regulators by way of Control Pressure to the FD Head.
If you suspect rich running, then a Fuel Press. Test would be in order to determine if the control pressure is within spec & the same side to side.
Sounds like the easisest most direct thing to do is simply put in a new set of plugs gapped correctly and run them awhile. I don't really see a need for platinums, however I think the factory did run champion G's which were gold with a wide heat range.
I think with these cars getting older and the chances of one system problem or another increasing and plugs being the first thing to look at and replace when problems occur the cheaper plugs are probably the way to go...like a sacrificial annode so to speak.
>>it still seems to be running rich,>>
Beyond the static idle mixture setting, the mixture is controlled by the Aux. Press. Regulators by way of Control Pressure to the FD Head.
If you suspect rich running, then a Fuel Press. Test would be in order to determine if the control pressure is within spec & the same side to side.
Sounds like the easisest most direct thing to do is simply put in a new set of plugs gapped correctly and run them awhile. I don't really see a need for platinums, however I think the factory did run champion G's which were gold with a wide heat range.
I think with these cars getting older and the chances of one system problem or another increasing and plugs being the first thing to look at and replace when problems occur the cheaper plugs are probably the way to go...like a sacrificial annode so to speak.