jclydejohnson

I have a 1971 911T. Last week it cut out on me. After initially being able to start it and it cut out after a few miles, I was unable to start. I had the CDI and coil bench tested by Bob Aslock (super guy) and the CDI was bad but the coil was good. He was kind enough to loan me a CDI while he rebuilt mine. The CDI he loaned me was an upgraded version with his own electronics that is mainly used for track cars etc. I swapped it out and the car started right away but is missing and idling real low. It was running great prior to the recent issue. I can drive it but need to keep the hand throttle up to keep it going. Is it possible that the new CDI can change the timing or other ignition parameter. Any help would be great!

Jeremy

TonyVan

Jeremy,
shoot Bob an email. He would know best if the CDI is the problem
Tony

systemsc

The 3 pin CDI rarely fails unless the battery is reversed, e.g. by jumping it, or an over-charging alternator. Did your engine ever miss-fire with the original CDI or idle too low?
If not, then your rebuilt CDI has introduced a new problem.

Spyerx

Points or electronic ignition?
how is the rest of your tune?

i had a cdi 3 pin fail. It simply wouldn’t start.