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1058379
Actually the last time I looked under the hood I did not see any plug wires or even a readilly apparent plug location (possibly covered or shrouded) distributor etc I am pretty familier with the 4.2 and the older 4.0 as well as the 2.5ltr engines. Is the late model 4.0 (3rd gen?) distributorless ? Is this the OBD II that they ( the dealer) keeps telling me is so sensitive to carbon in the chamber, I know its BS but they have fallen back to: it's due to the OBD II or OBD 2 as the reason they HAVE to do this carbon removal --at my cost of course. I have refused becuase there is NO reason in my mind that carbon buildup in the combustion chamber will cause the engine to run rough or a cylinder to misfire unless the plug becomes fouled --at that point the plug needs to be cleaned or better off replaced. Cleaning the cylinder in my estimation is meaningless except during a rebuild as carbon buildup might affect readings of critical surfaces.
AND I feel that anthing that will remove carbon buildup from valve stems etc has got to have a pretty good chance of damaging seals and leaking down past rings into the pan etc. I have had experience with GM fuel injection cleaner that got through chemical resistant gloves and took skin off of my hand it was so caustic. So I am not too keen to put anything similar in my engine. Furthermore (as if this wasnt long enough) If the engine has that much carbon buildup at 31000. 1 where is it comming from ? and 2 wouldnt that much carbon indicate another problem and jarring chunks of carbon loose cause problems downstream?
The spark plugs are factory original and are due to be replaced as well as wires and such at this point. [addsig]
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