Ignition shutdown problem

[romantic comedy]

the sensor would have to fit tight, in order for it to stay put. It sounds like the sensor is not tolerant of much variance in the cam size. I suppose ever sensor of this type would be an interference fit.

After hearing of failures, I am suspecting that the sensor is not up to the job.

[sastanley]

No

Neil..no..there is no opening in the EI plate to allow removal without pulling the collar as well. It is simply a hole in the plate to slide over the shaft.

[ArtJ]

I heated the second one after having broke a first one that was not heated.
Neither would fit on the shaft if not heated. I also have a module on my
working engine on the boat which went on easily.
On the spare engine Cleaning and lubricating the shaft did not help. It was simply a mismatch
in diameters on the spare engine.

Since the "normal old fashioned rotor" never went down that far on the shaft it might be possible that sometimes the
factory didn't worry about finishing the deeper portion of the shaft as closely. It certainly couldn't be due to wear since that would make the diameter smaller, not bigger

I cleaned up the shaft -corrosion and crud build up were not the issue.

[Don Moyer]

Delco Distributor shaft tolerances

Art,
Happily, other than the problem you had several years ago which required warming your magnetic ring during installation, we have received very few other reports of magnetic rings breaking as your first one did. None the less, we are moving on your suggestion to modify our instructions to include the use of a hair dryer to warm the magnetic ring in cases where more than gentle tapping is required to seat the ring to a proper depth. This addition should alleviate what few problems may otherwise occur in the future.

In a related matter, I need to correct an apparent misunderstanding I conveyed to you in one of our conversations several years to the affect that we had discovered a problem with factory tolerances in the dimensions of Delco distributor shafts.

Distributor cams do wear over time, so it's understandable that a magnetic ring could fit more snugly when installed on a very low time distributor shaft, and more loosely on a high time engine. However, we have never identified these variations as an indication that any Delco distributor shafts were somehow out of tolerance. In fact, where differences do exist in the fit of magnetic rings, I would be more inclined to suspect that the manufacturing tolerances in the magnetic rings would be a more likely cause factor than the distributor rotor. But again, your suggested addition to our instructions should head off any issues with magnetic ring installation in the future. Don

[ArtJ]

Don

That ignitor module was shipped to me in February of this year 2014.
I was billed for a replacement as I was told it was a shaft problem.
Order 14-25641 The replacement was order 16400. I was billed for both
the original and the replacement

Best Regards

[Administrator]

Hmmm.

I think Don told me that the magnetic rings for Prestolite, Delco and Pertronix distributors are all different from one another.

We really don't have good numbers on how often the breakage problem has happened in the field, but Don did tell me that in the hundreds of Prestolite and Delco distributors MMI has rebuilt, they've never had one crack.

Bill

[ArtJ]

Bill there have been other instances:

Shawn had one crack

Both the original I bought from Don cracked and the replacement
would have cracked if it was not heated.


Best Regards

BTW The one I previously installed on my other- in the boat engine ( this was a spare engine went on readily.

There may have been a tolerance issue with the batch both of the February modules. I still have both of them
the cracked one and the heated and installed one. I would be happy to supply the cracked one for tolerance
checking

[joe_db]

Any reason Moyer is not shipping the newer version of the Ignitor?

[67c&ccorv]

I have Prestolite distributor...just sayin'?