Quote:
Originally Posted by smadsen
My CDI box failed. After a 30-minute heat soak the motor would start to splatter and quit. Found a Porsche shop with a known good CDI for back to back test. Sent the old box out to a guy who fixes them. I believe he just touches all the solder joints and replaces whatever fiddly little gizmos on the circuit board that have failed. All in, a couple hundred dollars.
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Hey smadsen,
Thanks for sharing your experience – that actually sounds a lot like what I’m seeing.
The “runs fine for 30 minutes, then starts to splutter and quit” description is pretty much spot on for my issue.
Good to know a bad CDI can behave that way after a heat soak. I might try to source a known good one for a swap test like you did – seems like a quick way to confirm. Also good tip about getting the old one repaired instead of buying new. A couple hundred dollars is way better than the price of a brand new unit!
I’m also going to try the things Bob suggested – checking the points gap and making sure the CDI is getting stable 12V – just to rule those out before I swap the box.
By the way, do you remember who you sent your CDI to for repair? Always good to have a trusted contact if it comes to that.
Thanks again for the insight – really helpful to hear from someone who’s been through the same thing.