[DML] Ignition experiments
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[DML] Ignition experiments



Since I've had people express interest in my ingnition issues, I have 
new news to post but first, a question:

Has ANYONE bought an 18kV Bosch coil from John Hervey and had good 
results? So far, I'm only hearing bad news about these. I've also 
tried Accel, and "Standard" brands with the same poor performance.

Any wire that passes a strong enough signal makes an inductive field 
which can be picked up by a timing light (unless it's shielded).

My last test with my timing light showed that all 6 plug wires nearly 
quit firing under enough of an engine load. The next test was to move 
back to the dizzy/coil feed wire and see if that dies too. It does 
NOT. No matter how hard I spike the throttle, or lug the engine, the 
coil always puts out a strong signal. I also put the timing light on 
the white/slate control wire from the ignition ECU to the coil and 
the pulsing control signal is very strong there under all loads as 
well.

It's as if the higher voltage is breaking down the plug wires or the 
rotor. The timing light is strong and steady at all points except the 
6 distributor outputs. Also note that even if the cylinders are mis-
firing (as if fouled, bad wires, fuel starved), as long as the dizz 
is spinning, the pulse coil should put good pulses to the ECU which 
converts and amplifies these and passes them to the ignition coil. 
The "loss" just seems to be on the 6 wires.

My wires and rotor are only 8-9 months old, but the rotor has a 5k 
ohm resistor and the wires are of a generic make. They may not be up 
to the task. I've ordered a new rotor, quality wires and a new pulse 
coil (just in case). I'll post results this week once I get things 
installed.

Rich A.
#5335




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