95 Disco Standard

Any thoughts on no spark from the coil?

Seemed to happen intermittently and now won't start at all and have traced it to no spark. Been following the Rave troubleshooting and I've done the 4 voltages at the coil and they seem good. For test 3, amplifier switching, I'm getting 12 volts with the ignition off where it says it should be zero. I seem to remember that this test was an error in Rave manual so not sure on that? Can anyone confirm proper procedure?

I have already fitted new coil and amplifier. New wires, cap and rotor. Pickup in the distributor seems to have the correct resistance (3.5k ohms). Air gap is good. Anything else I can check?

Thanks

 

my service manual says under amp switching test >>connect volt meter between battery + and coil -.....should be zero volts with ign switch off,... then zero volts with switch on, ...then crank engine and voltage should increase.........if voltage increases then move to coil test > remove HT lead from dist cap and hold about a quarter inch from the head or block,,crank engine and you should get good strong spark>>>if spark is weak or not there at all..try a new coil or lead

also possible is a bad rotor ( even though it's new)
pick up coil should have between 2k and 5k ohms resistance

go back over ALL the connections, make sure the ht lead is seated well in the coil and cap

 

any luck with this ??

 

You called it. Bad rotor even though new. Put the old one back on out of desperation and she fired right up! Running great now! Serves me right for not going genuine parts.

Thanks

 

Hi Don & Land Rover Community, was there ever a reply to your question regarding the test 3 voltage requirement with the ignition off? Because, I measure 12.6v too (not zero as required by the RAVE), so is this a typo in RAVE or do I have a fault. Thxs, Ian