You may need to run a hotter heat-range plug. The hotter running plug will
burn off the fouling. Also, if the car sat a long time, the cylinders may
be glazed and the oil rings not sealing (just enough to foul the plugs).
Fix is to pour WD-40 down each plug hole, and restart engine. The WD-40
may help to break the glaze and free a seized ring. (Do all the plugs foul
the same?)
At 10:37 AM -0400 5/21/98, TShaw10686 wrote:
>My 56 Imperial, which is still under restoration, starts quickly, does not
>smoke but the plugs foul with oil (and seemingly gas). I had it towed to a
>local garage where a recommended mechanic checked it over a couldn't find
>anything seriously wrong. He suggested I install an exhaust system (old
>system had been removed), and fix a broken heat tube (from exhaust manifold to
>auto choke on carb). His thoughts were that the lack of heat and back
>pressure was the culprit.
>
>I have done all the above with the same results. I have also changed the plugs
>(for the third time), installing the same plug used by a friend in the same
>(354) engine.
>
>I am at a loss as to what to do next and would appreciate any and all
>suggestions. The engine starts easily and runs OK for a while but then stars
>to make a "pop" sound, noticeable at the mufflers, as the RPM's increase. I'm
>confused as to why the plugs would foul but the engine doesn't smoke.
>
>Confused In PA
>Tom Shaw - 56 Imperial
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