Belated follow up. I replaced the plug at the distributer as the signal from the hall sender was intermittent. Brand new Bosch plugs were had for cheap.
So I grab a new ignition coil, and a full set (4) of spark plugs. The Pre-gapped BOSCH Iridium plugs were the same price as OEM platinum, so I figured that's fine for me.
After pulling the plugs, Cylinder 1 plug was definitely eroded. The other 3 plugs looked fine, but I might as well replace the lot. The new Ignition Coil went into Cylinder 1 as well, and I started it up.
Check engine light went off, starts up fine, drives fine, idles fine.
Yeah, I'd rather use some cheap BOSCH SUPERS or other $2 copper plug than any Autolite.
Sometimes you just have to try a few sets. I have a '97 Jetta which had NGK plugs in it for close to 4 years. I went through two sets of NGK plugs and couldn't get the car to run. I switched to Bosch and it started right up and ran fine.
Since Iridium is tough, and there is platinum at the tip of the movable electrode, I bought Bosch Iridium.
Bosch W7DTC plugs were the best, caint get them no mores, use NGK BP6ET plugs instead.
I'm using the OEM Bosch spark plug. I gapped mine to 0.024" as per Bentley and the car seems to run fine.
Bought Bosch platinum's and red bremi wires. swap everything all out, the misfires alot worse.
Personally I've never had any luck with ngk's in any of my vr's always just run Bosch plugs and wires....
First step, get those Bosch Platinums to a trash can where they belong. Even when I was in Bosch Fuel Injection Training School back in the early 90's, the Bosch Instructors were telling us not to put them in anything unless we wanted to start chasing driveability issues.
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