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#1
03-15-2010, 02:35 PM
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E320 Misses at load or low RPM-New Coil-boots and F8DC4 Plugs
EDIT:
I think I have it figured out. Bad wires. I haven't changed them yet because I just also figured out I believe the car has a bad head gasket. It white smokes when hot and driven hard. But last night I decided to work on it for a second and noticed (it was a VERY dark night) while running that I could see arcing through the plug wires. It was faint but there were sparks through the insulation to the valve cover on all 3 wires (or at least two of the three). Also, the number 2 or 3 *the one with the plug wire can't remember* boot on the plug was easy to see that it was arcing to the valve cover whenever there was a mis. So......... seems like I've found the problem. At this point I'm guessing the common failure of plug wires is the die-electric properties of the insulation. Maybe a ton of electrical tape would fix that! Of course the real fix is to just change the wires. But on to bigger things. The head gasket! I just changed as much as I could on my new E320 (Edit 1994 Model) to address a mis. I'm still getting a mis fire after: -F8DC4 Bosch plugs -3 NEw Coils -3 New boots under coil -REplaced OVP fuse Getting code 13 consistently and a 4 once in a while. I noticed the EGR will not hold vacuum (none at all). Could the EGR be stuck open? Would that cause a misfire?
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-E300d '99 350k -Suburban '93 220k -TDI Jetta '03 350k Sold -F250 '96 7.3 -Dodge Ram 12V -E320 '95 200k -E320 Wagon 1994 155k -300d Turbo '87 187k miles -E320 1994 200k -300d Turbo '84 245k (sold to Dan62) -300d Turbo '84 180k -300sd '80 300k -7.3 Powerstroke Diesel 15P Van 500k+ miles -190d '89 Non Turbo 2.5 5cyl 240k (my first MB) Tom's Imports of Columbia MO Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's. Last edited by 777funk; 03-18-2010 at 08:56 AM. 
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