Lifetime Premium Member
Date registered: Oct 2014
Vehicle: 1999 W210 E300, green, 148k mi. (Feb2016)
Location: Duvall, Wash.
Mentioned: 3 Post(s)
Quoted: 167 Post(s)
My older V6 Ford (Cologne engine) has bank-fire fuel injection, not sequential, so it fires three injectors at once and therefore can't turn off a single cylinder's injector. When it fouls a plug (it does happen, around every 4k miles, from coolant contamination: it has bad head gaskets and cracked heads, and I drive it 54 miles a day, every day), either #1 or #6 cylinder will stop firing, and it it continues to misfire under heavy acceleration, the CEL will blink but it's not shutting off the injectors. I know to stop immediately and change the plug, to avoid damage to the cats. AAA brings it to my driveway (pre-paid towing is what I call it; I get four tows per year.)
I generally catch the failing/failed plug long before it gets to a solid misfire, but it's happened.
I had not heard that the MB gas engines have fine control over the injectors and cut fuel in the event of solid misfire. There's a lot I don't know, and I'm asking if that is real, or only something you've heard. It makes sense, but I'm surprised I hadn't read of it previously.