[Spridgets] Ignition fault - Lucas electronic DM system

Weslake1330 at aol.com Weslake1330 at aol.com
Mon Jan 14 14:21:53 MST 2008


Ok, I do seem to recall the tacho dropping like a stone.  Friday night  I'll 
run the engine in the garage (with the doors open) till the fault is  
manifest.  I'm expecting it to be the pick-up rather than the coil.   I'll also see if 
I can work through the advice on the MG Cars bulletin board and  put my 
multimeter to some use.
 
In a message dated 14/01/2008 18:48:33 GMT Standard Time,  
dbl at chicagolandmgclub.com writes:

Unfortunately, the tach is your best diagnotic tool at the moment.  Since the 
tach is monitoring pulses at the coil, if the pickup ceases to  turn the coil 
on and off, the tach needle will drop like a rock, even  though the wheels 
are still turning the engine. OTOH, if the coil stops  generating the 
high-voltage sparks, the tach should still register, since  the low-voltage 
side of the circuitry is still  functional.


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