Quote:
Originally Posted by fever
I have run the Pertronix II along with Flamethrower II coil for two years in my 71 280SE 3.5. It has been fantastic with one exception. My RPMs read ~3 times the actual number at idle. Any thoughts on how to correct this?
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The Pert II is not usually recommended for our cars. This because they say it is not suitable for cars with solid core copper ignition wires. Did you change the wires on your car?
Regarding the tach, that happens if the existing switchgear is bypassed. The incorrect reading can usually be corrected by installing a resistor in the tach wire (green with black stripe). 8kohm 1/2 watt resistor should work. Installing a potentiometer on a temporary basis may help determine the optimum resistance. (This works with Pert I - no experience with Pert II)
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Graham
85 300D
,72 350SL, 98 E320, Outback 2.5