Jump to content


Photo
- - - - -

Help! No Spark.


Best Answer Chaddyfynn , 26 June 2020 - 08:54 PM

To those with a similar issue. We've now resolved this. It was the dizzy after all. The component which charges the ignition coil was bust, so no need for a new ignition coil. Just a new dizzy instead

Go to the full post


  • Please log in to reply
3 replies to this topic

#1 Chaddyfynn

Chaddyfynn

    Learner Driver

  • Noobies
  • PipPip
  • 13 posts
  • Location: Holywell

Posted 25 June 2020 - 01:55 PM

Around a week ago, I went to start my car (1984 Mayfair with electronic ignition) and it wouldn't start - just a click (so dead battery or faulty starter motor I thought).
I charged the battery and tried again - this time it turned over but didn't fire up (so not starter or battery anymore).
I'll run you through a list of things I've done since:

  • checked for a spark on the spark plugs (spark plugs grounded to engine block) - no spark
  • checked for fuel going into engine - fuel going in
  • attached spark plug to king lead and grounded to body - no spark
  • checked voltage across (+) on ignition coil and ground (ignition on) - 12V
  • checked voltage across (-) on ignition coil and ground (ignition on) - 10V
  • checked continuity between distributor body and ground - good connection
  • replaced ignition coil with spare
  • checked resistance between primary and ht output - ~10kohm
  • cleaned dizzy cap and all connections
  • rewired the ignition coil circuit, bypassing all existing wires from fuse box/ignition key to the coil, and the (-) wire to the dizzy, except those inside the dizzy
  • checked the king lead resistance - ~5k ohm
  • checked for spark between raw king lead and ground - no spark
  • checked connections inside dizzy - solid connections
  • checked firing order - correct 
  • checked HT leads from dizzy to plugs - solid connections, working wires
  • checked spacing on plugs - alright

I still get no spark from the ignition coil no matter what I do.
Am I missing something really obvious? I probably am! Why am I not getting a spark?
As far as I'm aware, I've checked everything except the internal wiring in the dizzy (ie from (-) on ignition coil through the dizzy).

Thanks,
Charlie - an enthusiast in distress!!


Edited by Chaddyfynn, 25 June 2020 - 02:00 PM.


#2 cal844

cal844

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 7,604 posts
  • Location: Ballingry, Fife
  • Local Club: TFMOC

Posted 25 June 2020 - 02:00 PM

Check for voltage on the coil positive, hopefully it's the coil and not the wire to it

#3 Chaddyfynn

Chaddyfynn

    Learner Driver

  • Noobies
  • PipPip
  • 13 posts
  • Location: Holywell

Posted 26 June 2020 - 08:54 PM   Best Answer

To those with a similar issue. We've now resolved this. It was the dizzy after all. The component which charges the ignition coil was bust, so no need for a new ignition coil. Just a new dizzy instead



#4 cal844

cal844

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 7,604 posts
  • Location: Ballingry, Fife
  • Local Club: TFMOC

Posted 26 June 2020 - 09:32 PM

Shouldn't need a new dizzy just change the module on the side?




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

Mini Spares