BenzWorld Junior Member
Date registered: Aug 2004
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Coil Polarity Changed, Added 5 Mpg
I connected the coil positive terminal to ground, and connected the coil negative terminal to the ignition module.
In other words, I connected the positve terminal of the coil to the chassis (ground).
Then I connected the negative terminal of the coil to the ballast resistor.
Gas mileage went up 5 mpg to 17mpg, the exhaust tone became resonant, clear and crisp, and no more gas smell was coming from the tailpipes.
Go to Page 96, Section 10, Haynes manual for 1968-1972 230, 250 and 280 and read this statement:
If the negative terminal of the coil is connected to ground, expect up to a 60% LOSS of spark plug energy.
I know this is counter-intuitive, but the results were amazing. Anyone else been there, done that? [?]