georgenuoo

two days ago i added injection cleaner on empty tank then i start to add premium gasoline until it became full, then i parked the car, next day i found check engine light on with code p0304 and their is a car had rough hesitate, i start to drive it and it become smooth and fine and check engine light diapers.

Today when i start my engine it hardly start with check engine light and it has codes p0300, p0302 and p0304 and after drive it for 1 mile it become smooth again but still check engine light on.... any suggestion please.....

c230 2006 v6 109,000 Mileage

Thanks

MJ50

moved to W203 forum...

insame1

Did you check to see what the codes mean? Did you read and follow the instructions on the cleaner?

LexBrett2

highly likely you plugs are fouled. Fuel injector cleaner is great but leaves thick orange residue on plugs. Change plugs.

georgenuoo

first code showed up was p0304 (misfire at cylinder 4), next day p0300, p0302 & p0303
i went to mechanic he reset the code and told me to add more premium gas.
now it drive smooth without any problems or lights.... hopefully the problem gone.
i will never add any of these cleaners anymore....

chazzz

Can you tell us what brand of injection cleaner so we wouldn't buy it for our Mercedes??

georgenuoo

honestly i don't remember the brand name but it was cheap...