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S3 Dizzy refurb

Posted: Sat Mar 22, 2025 11:07 pm
by fanman
I would appreciate any advice.....
16v, S3 dizzy. Car started misfiring slightly but kept running. Replaced the dizzy and all good again :D
I would now like to trace the fault on the old dizzy and refurb it so I have a good working spare.

I have stripped the old dizzy down and tested the coil - primary shows zero ohms and secondary 25.2 kohms
I don't know how to test the ignitor or the condenser.

Any ideas please?

Re: S3 Dizzy refurb

Posted: Sun Mar 23, 2025 7:18 am
by Micron
I don’t know personally, but you should be able to get the basic idea from YouTube

Re: S3 Dizzy refurb

Posted: Tue Mar 25, 2025 6:09 pm
by fanman
Micron wrote:
Sun Mar 23, 2025 7:18 am
I don’t know personally, but you should be able to get the basic idea from YouTube
Thank you , but not much of any help on YT that I could find tbh.
I am pretty sure it is probably the transistor in the igniter module. They are cheap to buy but I have been unable to desolder/remove it :roll: so I have ordered a refurbished igniter unit.

Strange - I knew S1 dizzys are prone to failure but thought the S3 was pretty bullet-proof.

Re: S3 Dizzy refurb

Posted: Sat Mar 29, 2025 12:54 pm
by jrh
Remember
NEVER, ever, leave a ht plug lead disconnected .