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Re: Chrysler ignition -- will the real resistor please step forward? Volvo data to read... 200 82

posted by  someone claiming to be abe crombie on  Sun Jan 3 16:35 CST 1999 [RELATED]

What I said is that none of the Volvos using Chrylser ignition (all of which are computer ignitions) and Bosch computer ignition (The 240's after 1988, 84 and later 4 cyl 700/900, and 87-90 B280F 700) don't have ballast resistors. The Bendix models also don't employ a resistor.

All of the other earlier models have transistorized (NOT computer, transistorized still uses vac advance and centrifugal weights for timing control) which DOES use a resistor. On the non-computer models the coil is optimized for spark production at approx 10 volts. During run the resistor will control it to that value during the grounding phase of ignition. During cranking the resistor is bypassed so that you still have 10V +/- to allow for strong spark while starter draw depresses voltage. On the computer versions the control unit regulates the current of ground path through power transistor and will increase the flow during low voltage to give strong spark---no resistor needed.

Don, I will research the power feed for the brown wire at coil. I think it is from the ignition harness for the Chrysler box.





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