[DML] Re: Tune-up

["Robert" <dmcvegas@xxxxxxxxx>]

Water in the sparkplug wells is of course a bad thing. If nothing else, always keep on of those large drinking straws from McDonald's with you. That way you can easily blow the water out of the wells quickly.

I believe that Rob Grady once said that when it comes to the BOSCH plugs, to stick with copper, because he had problems with the silver and platinum ones having poor seals between the porcelain and the body. I've ran Platinum plugs in my car, and damned if I didn't have the very problem he warned about. The engine began to loose a bit of power, and you could see discoloration on 5 of six plugs, and soot on one of them. And this is a stock engine. My old DeLorean mechanic confirmed the same thing, and said that for all cars that came into their shop they would avoid BOSCH Platinum and Silver plugs like the plague and would just stick with Copper.

Based upon my experience for a reliable engine I would choose these replacements:

Either BOSCH Copper, or NGK Plugs.
Either OEM or BOSCH Sparkplug wires.
Stock Coil.
Stock Resistor.

Keep in mind to stick with quality Ignition Wires. I once installed a set of "Blue Thunder" performance wires by Borg Warner, and had nothing but problems with them. Aside from not sealing properly ontop and allowing water to drain into the sparkplug wells, they were leaking voltage and making my engine problems worse.

I've experimented before with the MSD Blaster 2 coil & 8ohm Resistor, and gaped the plugs to .32. Performance felt like it had improved, and a couple of other DeLorean owners who had ridden with me said that acceleration seemed quicker to them as well when they had ridden with me. Of course that's all anecdotal, but what wasn't was emissions significantly increased and MPG dropped by about 3-4mpg. Of course there were other problems with the engine before the car was shoved into storage so it's rather hard to do a full comparison.

-Robert
vin 6585 "X"



--- In dmcnews@xxxxxxxxxxxxxxx, "stainlessilusion" <5n-@...> wrote:
>
> Guys; I am working on my D a little since I have a rough running engine, and am curious what the original coil has for output voltage. I'm looking at John's 25,000 volt Bosch coil [as an upgrade?] since I doubt the stock one has that much punch to it. I have +4 plugs that are a little old but few miles and are still in good shape; also Johns 8mm wires and upgraded resistor. I once used the blaster coil with my setup but I remember having problems with it - I believe it was melted distributor rotor but can't remember correctly. Nonetheless, with what I have as far as plugs, wires and resister; which coil should I be going after? My engine runs like garbage when it rains, and when it is dry it sputters at stops from time to time and just doesn't feel "right". Thanks guys -----Dani B. in FL!
>




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