Ok, let me set the stage first. 2000 E320 with 98500 miles. Last night while driving home, the interstate looked like Moses had parted the traffic waters, no one around. So I figure this is a good time to "heat'er" up a bit and burn off some of that moisture I've been finding under my oil cap lately. I proceed to flat foot the old girl and run the piss out of it. I slowed several times where I knew the local PD liked to hang out then would go back to my flat footed position. After about 15 minutes of doing this, I'm headed up a hill well north of the century mark, and all of a sudden I lose power and the check engine light comes on. I hit the next exit and limp it into a gas station. Open the hood and look around...NOTHING....didn't smell to hot, nothing unusual looking, the engine is stumbling like crazy though. So I shut it off, start it up, back to all 6 cylinders......ahhhhhh, so I'm only about 8 miles from home and think, what ta heck, it's not knocking or making any bad mechanical sounds, so off I go. I babied it onto the interstate and ran it about 70. Approx. a mile from my exit I put her to the floor again and around 4K rpms, it does the same thing, I lose several cylinders. I come to the exit light, shut it off, start it back up, we're now back to all 6 firing.

So I have my wife drop it off at my local indie to read the codes. I had P0300, P0301, P0302, and P0303. Those are all mis-fire codes for the right bank (cylinders 1-3). The indie wants to change the wires for the small fee of $562 , I promptly declined his generous offer and just had him clear the codes.

I get it home this afternoon and start checking stuff over to see why I lost the right bank. I removed a plug from each cylinder (they only have 1K miles on them), they all looked perfect or should I say identical. I did a resistance check of all 12 wires, they ranged from 2 to 4 ohms. There is no checking the coils but what are the chances of all 3 being bad, pretty slim in my book.

So that leads me to this thread. I can't think of any reason why I would lose my entire right bank of cylinders. At first I thought wiring harness to the coils, I can't really check it but all of the wires look fine at the connectors, no insulation cracking.

To sum things up, I'm losing all 3 coils on the right bank under high heat and speed.

Any ideas???? My indie is scratching his head too....

Thanks all............

Dale

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86 Nissan 720 P/U - 285K miles and counting!!
91 Volvo 240 - 218K miles and still going strong.
00 Mercedes E320 - 111K miles and lovin it!!!