number_one_c55

Hi, Im able to get a very good deal on a set of Spark plugs for M113 430 engines. I know there the same as the 500 spark plugs but does anyone know if they are the same as my M113 C55 engine? I'm able to get a smoking deal on these so hopefully these will fit!

kjb55

No. Per Bosch application information.

xxaarraa

Aren't plugs every 100k?

number_one_c55

Yes, I have a slight missfire. Ive changed plug wires, it helped but i think plugs would be the icing on the cake.

kent426

Are you pulling a code or does the car jsut sputter at idle a bit. You can run NKG plugs for $2 each instead of the Bosche at $7 each and notice no difference. I changed mine at 40K.

If you have the sputter, its not spark related but fuel.

number_one_c55

I have checked smooth running values at idle. Where I am noticing the issue. Number 2 and 8 were out of there specified values. (-3.50,3.50) cylinder 2 was intermittently at 5.05, cylinder 8 was at 4.42. Since spark plug wires it has been better. But I think to eliminate the problem spark plugs would be good. I will swap coils.

**i have looked into smooth running values fault counter, nothing is present**





QUOTE=kent426;5152169]Are you pulling a code or does the car jsut sputter at idle a bit. You can run NKG plugs for $2 each instead of the Bosche at $7 each and notice no difference. I changed mine at 40K.

If you have the sputter, its not spark related but fuel.[/QUOTE]