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Its all about timing! did you have have to adjust timing on an older car as part of a tune up?
if a plug starts to to go bad, the spark is fired off at the wrong time, causing the presure of expanding gas to push on the piston either too early or too late. if its too early you lose momentum created by the other cylindars firing, if its too late, the force of pressure it can put on the piston head is lost. kinda like pushing against the gas, or pulling on the gas, vs the gas pusing against the piston. the spark has to fire the moment and a half after the piston hits the apex of its up and down motion.
posted by 64.213.82...
Posts in this Thread:
- 10% reduction in gas mileage, PYinNY, Mon, 23 May 2011 13:43:19
- Recent experience with plugs, westernny, Tue, 24 May 2011 06:43:26
- Second the Tires, Larry in Elkins Park, Tue, 24 May 2011 05:46:10
- Another factor..., JustinHiFi , Mon, 23 May 2011 21:05:15
- Re: Different tires?, AeroLady, Mon, 23 May 2011 21:02:26
- Tire pressure?, Johnson , Mon, 23 May 2011 17:54:36
- Re: 10% reduction in gas mileage, RMinNJ, Mon, 23 May 2011 14:39:48
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