Aussieveedubbers · Tech Talk

Riddle me this!!

https://forums.aussieveedubbers.com/threads/102343/riddle-me-this

Old Hutcho ·

Folks

Today I went to start my bug. No spark. New coil, new plugs, breakerless ignition module.

Test light from earth to + on coil. Light! Complete circuit. Test light from earth to - on coil. Light! Complete circuit. Still no spark.

After a bit of stuffing about I put the test light from earth to - again. No light! Incomplete circuit. Spark! Ignition! Engine purrs.

Its a bloody mystery to me. I dont understand white mans magic. What about you?


regards

Old Hutcho

68AutoBug ·

You just fixed a really perplexing problem Hutcho...

don't knock it... lol

loose wire... or connection.. even just bumping a wire or connector can do it.. lol


My Son doesn't understand how a loose/dirty connector can cause problems even though its connected.. lol

Best of luck in the future

Lee

SuperOwen ·

Sounds like a dicky module. The module needs to ground the coil to pass current (charge it) then open circuit it to collapse the field and make the spark. Did the engine roll over at all between getting the light to come on and off? Carry a spare set of points...

68AutoBug ·

SuperOwen wrote:Sounds like a dicky module. The module needs to ground the coil to pass current (charge it) then open circuit it to collapse the field and make the spark. Did the engine roll over at all between getting the light to come on and off? Carry a spare set of points...
yes, the distributor may have been just on the edge of the magnetic contact in the module..??

You can buy cheap PLAZMEX modules for $45 now so they are a cheap spare.. not like the other very expensive modules..

carrying points and condensor usually makes them work... lol

cheers

LEE

Uber Kafer ·

Old Hutcho wrote:Test light from earth to - on coil. Light! Complete circuit.


to clarify, at that step you had a complete circuit through the coil, but not the distributor, so the circuit from the coil to the distributor was 'open', OR, the electronic points were 'open'. Next time you tested they were closed.

But most likely, as Lee pointed out, you probably had a loose connection. So that might be a loose wire in a crimp lug, or a loose lug on the spade terminal, or a dirty spade terminal. Have a close look with a torch, and give all connections (and wires) a pull. It will come back and bite you if you dont fix it.