[Healeys] Engine dies suddenly--solved???
michael.oritt at gmail.com
Sat Mar 23 06:30:24 MDT 2019
>From the first post: "The car has a Mallory Unilite ignition system tied
to an MSD coil
On Fri, Mar 22, 2019 at 10:11 PM i erbs <eyera3000 at gmail.com> wrote:
> holding out on important info. No mention of electronic ignition in your
> original post... Good on you pal. Have a great trip
> Ira Erbs
> _______ _______
> (______ \____1959 BN4____/ _______)
> BT7 engine and disk brakes
> 1967 MGB [image: MG]
> A racing car is an animal with a thousand adjustments. Mario Andretti
> Please excuse random auto corrects and misspelled words
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> On Fri, Mar 22, 2019 at 5:13 PM Michael Oritt <michael.oritt at gmail.com>
>> Rather than replacing parts on a wholesale basis without learning what
>> was the cause of the car's suddenly stopping my hope/goal was to find a
>> component/connection in the ignition system that appeared to be defective.
>> This morning I started at the key switch and it tested fine. I then moved
>> to the ballast resistor whose task is to reduce voltage to the MSD Blaster
>> 2 coil and the Unilite ignition module. I wanted to check the ballast's
>> value with an ohm meter and because of where it was installed--just above
>> the starter on the inner face of the passenger toe box--I could not get the
>> probes to the contacts, so I removed it to check it on the bench. When I
>> unscrewed the bolt that held it in place a piece of its innards fell onto
>> the floor of the garage!
>> The Mallory 700 resistor, which along with the Unilite, has been in the
>> car for 10-12 trouble-free years. It is supposed to have a value of 1.5
>> ohms. On examining its remains on the bench I could see that the coiled
>> wire appeared loose at one end and when I checked its value I got readings
>> that were all over the scale. Luckily I had a spare ballast on hand--this
>> one actually made by MSD and matched to the blaster coil--so I installed it
>> in place of the old unit. I'm "cautiously optimistic" that I found the
>> issue but of course that will have to be borne out by experience.
>> My wife likes to ride in the Healey and we like Richmond VA, which is
>> about 125 miles from home. The route down US 301 will keep us off of
>> interstates, so we're heading down there in the morning for an overnight
>> trip. I'll be bringing along a multimeter along with a spare coil, rotor
>> and Unilite ignition module, wire and connectors, etc. Hopefully all will
>> go well. Fingers crossed....
>> Best--Michael Oritt
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