TOPIC: Ignition Misfire unknown if coil or ignition wires???
I had purchased a 99' ML430 about two years ago and had a lot of problems with it, but once I found out that this was the first model that was made for the SUV, I knew that first year models always have an extensive amount of bugs and two or three years later they make the version that will last forever.
Now with this being one day the check engine light came on and I had noticed that the engine would shake when in idle position or slowing down. Whenever I had accelerated a cylinder or two would drop ( I figured it dropped since I lost power). I went to AutoZone and they said I had six codes for miss-firing but they never specified codes. He said that it is either the spark plugs or spark plug ignition wires. I went out and bought the two prong Bosch spark plugs and replaced them all. Well after I replaced these the light had went off. About a Month later the light came back on. The same problem had started with loss cylinders and one morning I had went to start it and it would turn over and no fire. I had went to AutoZone again and i received these codes:
P0410 Secondary Air Injection System Malfunction
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1, open circuit before cat)
P0155 O2 Sensor Heater Circuit Malfunction (Bank 2 Sensor 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0301 Cylinder 1 Misfire Detected <--- often indicates catalytic converter problem (says BOTONOSI)
P0305 Cylinder 5 Misfire Detected
P0306 Cylinder 6 Misfire Detected
P0307 Cylinder 7 Misfire Detected
P0308 Cylinder 8 Misfire Detected
Now I am trying to figure out if these are the coils that are bad or if it is just the spark plug wire or the ignition wire harnessing set.....
Now if it were the coil I figure I would have prob got an Ignition Coil Primary/Secondary Circuit Malfunction code, which is a P0350 - P0362 code..
I got the codes list off here website is (http://www.whnet.com/4x4/dtc.html
) from benzworld.
I had looked all over this site to find similar situations and this was the only one (http://www.benzworld.org/forums/w163...999-ml430.html
I guess the question is should I replace all the spark plug wires... and then if that does work replace the coils????
Thanks for all that will help.
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