[Michael C Henry]

My car came with all mallory ignition.It had been operating flawlessly. It had a Mallory 38 serues Unilite distributor, Mallory 29440 Pro master coil , Hy FireIV cd ignition box , Mallory ProSidewinder 8mm plug wires . It had an adjustable propotional revlimiter built into the dash .I thought it was functional. I found out later that it was only functional when it was only the distributor and coil. So I changed over to a new HyFire VI 685 Ignition box adding a #700 mallory balast resister and a 29351 active power filter to the system . It has two programable rev limites and progrmable auto start retard along with multiple strike spark plus alot of other features I'm not using.
Anyway I had problems. I had fouling plugs and missing -stumbling.I thought it was the carburetors over fueling and fouling the spark plugs. After sending the carbs off and having the romanced by pros. I still had problems. I was later convinced to look at the ignition system. I had a time. It would start and idle for awhile.Then when driving after ten minute drive the car would start with a slight miss and get worse from there. The car would idle but ingear trying to leave a stop lite or drive was terrible.I cleaned the spark plugs each time before the next test. The time period that it would take to start the miss when driving the tim it would take for the miss to start would vary but ten minutes is a ruff guess.The miss would get worse trying to drive the car home. While stopping at traffic lites, the engine would idle great but trying to leave the lite, accelerateing even slightly was terrible .While looking online at Mallory's site compairing my wiring to their diagrams. I came to the conclusion that they are not clear or consistent.Reply's from their tech's also varried. What componets receive resisted power what componets get full 12V .I'm now convinced that it was the miss that caused the fouled spark plugs. I'm at the point where I have bypassed( elminated) the box ,running on distrib and coil and seems to be fixed. they say the boxes either work or don't and the coil is more than likely the problem.I'm blaming the box.
Anyone else have similar story?