[Healeys] update--BJ8--puttering, backfiring and shutting down
javrugtman at htcnet.org
Sun Oct 10 09:48:12 MDT 2021
I've had two ignitor failures; one the magnet support unglued and they
all fell out; dead stop; two a constant miss, one magnet was reversed.
But generally they have been quite reliable.
On 10/10/2021 10:12 AM, Bob Spidell wrote:
> Thanks for reporting, Tom. When I read you suspected the Pertronix I
> thought: "This is the first I've heard of an Ignitor becoming
> intermittent (I'd always heard they failed outright."
> On 10/10/2021 3:30 AM, Tom Felts via Healeys wrote:
>> After 3 days of intense troubleshooting and racking my feeble brain
>> on why this happened, I FINALLY found out why. Background-------was
>> having a pleasant drive-----felt a slight miss------BIG
>> backfire--sputtering then cutting off. Sat for a while, she started
>> and I drove maybe 100 yards. Repeat of above------------sat beside
>> the road and checked to see if I had fuel to the
>> carbs--yes-----pulled float bowl lids and plenty of gas in float
>> bowls. had spark to plugs. Nothing obvious--so called AAA--got
>> towed home.
>> Next several days I tried the switch and check method----changed fuel
>> pump----changed coil, changed rotor, replaced dist cap, pulled the
>> battery cut-off sw and directly shorted to body ground, checked to
>> make sure the low tension wire had not grounded itself. ALL--to no
>> avail. so I was down to my last idea.
>> That was to pull and replace the Pertronix Ignitor. As I was taking
>> it out, The cause of this whole mess became apparent. The hot wire
>> from the Ignitor to the coil had been rubbed raw on one side of the
>> wire, exposing just a tiny amount of the inner wire. It was this
>> small amount of exposed wire that was shorting intermittingly. and
>> this was the source of my problem.
>> Apparently, over time the rotor had rubbed the wire until it rubbed
>> enough insulation off to expose the wire. This shows how long that
>> Pertronix had been in there.
>> This was truly an AH HA moment. Happy I found it but so very
>> flustrated over what it took to discover it. But in the process I got
>> a new fuel pump (electronic), new dist cap, new rotor, new Ignitor,
>> new Pertronix coil, and a lot of knowledge:)
>> Glad the root cause was finally found and fixed and she is purring
>> Anyway, replace
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