1998 740i - need some help clean injectors

[dbill0215-7]

I was going to try and run one of the injector cleaners thru my auto as I feel some of the injectors are dirty and causing a misfire but not sure where to pour it in. I thought using a vacuum line would be best but can someone give me some advice. I have been told by a firestone dealer they have a process that does this but thought it was just the same to run this cleaner thru it. Thank you.

[marti5]

You pour it in the fuel tank.......I wouldnt have thougt its the injectors causing the misfire, unless you have contaminated petrol, could be many things, you really need diagnostics done, it maybe ..MAF,plugs or a plug,leak in the vaccum hoses or if its done around the 100k mark I would be heading for the PCV valve for certain.