Steve and netters, I had been told for years that Bosch & NGK plugs both had coatings on them from the factory, but I never trusted that due to not having control over who handled them previously. The same with checking the gap. I always checked the gap to make sure that it was set right for my application, because the "preset" gaps was often times wrong for my application, or if some one mis handled the plug, the gap would be closed up some and too small. Just be sure that any Anti-seize material applied does not get on the electrodes or it will foul the plug, and preventing one problem, will cause another. Oh, and just as a side note for diagnosing problems: If it was running fairly well before you worked on it, re-check everything you did last first before jumping to conclusions and beginning to replace parts to correct a self induced problem. I had many a junior tech make a minor error while working on a car, and cause his own problem, but the tendency is to rule out what we just did and look elsewhere.
Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com http://kr-builder.org/Colin/index.html