01 Nov 11 20:10, Mark Hofmann wrote to Roy Witt:   
      
      
      
    RW>> Figure $112 for a double set of platinum plugs and about $50 per   
    RW>> coil. Ford uses a coil-on-plug setup that also requires replacement   
    RW>> at plug change time. At least they don't have to worry about   
    RW>> replacing plug wires. Sometimes those Ford coils die long before the   
    RW>> plug is worn out.   
      
    MH> As far as I know, the Durango has never had the plugs replaced.   
    MH> Still runs perfect.  It has 135k on it now.  My Monte Carlo just went   
    MH> over 156k.   
      
   I'd plan on a plug change in the near future for both cars.   
      
    MH> It would be nice if I could figure out a solution for the 20 second   
    MH> cold start tapping.  Everyone has said not to worry about it.  I put   
    MH> sythentic in it and it has helped alittle, but still does it for   
    MH> under a minute on those cold mornings.   
      
   Here's a trick I recently learned from the boys at MalibuRacing.com...I've   
   done this with kerosene before, but never ATF.   
      
   Remove the oil filter and replace it with a new one, but fill it with ATF   
   first, but don't use Type-F...Run the engine up to full temp and leave it   
   run for 10-15min before shutting it off and changing the oil and filter   
   with new oil.   
      
   In the old days, we used to clean the sludge out of engines by filling   
   them with kerosene and one quart of detergent oil. Let it come up to full   
   temp and hold there for 20 minutes. Drain and refill, again replacing the   
   filter.   
      
      
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