M119 Misfire after IC and Spark Plug Replacement
09-15-2017, 03:48 PM
#1
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1994 E420 (Black Turd)
M119 Misfire after IC and Spark Plug Replacement
I had a few issues as of recent with my car that I thought would have been fixed after some part replacements, I replaced the MAF sensor, and both ignition coils as well as throwing in some Bosch Platinum OE Finewire spark plugs from RockAuto. Now my car has a pretty bad misfire to the point where it shakes the whole car and eventually stalls out. Anyone have ideas? There is a pretty poor condition spark plug wire that I found and I feel like it's the cause. Just checking for some insight here before I drop about 200$ for a new set of wires.
09-20-2017, 12:36 PM
#2
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Lose the platinum plugs on the M119....stick with regular OE Bosch plugs....it will run better.
A bad plug wire would definitely cause your problem as well.
How are the wiring harnesses condition looking? If they are original (there might still be a label on it) then it's way past time to replace. Many, MANY running issues can also be tied to the deteriorating harnesses which was/is a common problem with this vintage MB.
A bad plug wire would definitely cause your problem as well.
How are the wiring harnesses condition looking? If they are original (there might still be a label on it) then it's way past time to replace. Many, MANY running issues can also be tied to the deteriorating harnesses which was/is a common problem with this vintage MB.
