Quote:
Originally Posted by Modshack
Yes there have. Some of the pictures I've seen have not been pretty.... With direct injection the valves no longer get a flow of Gas which serves to keep them clean. The only air you get is mixed with Blow-by and contaminants (oil) from the PCV system which builds up on the valves and stems. I think Toyota employs an additional upstream injector to deal with this, but most don't. Pics of the VW 2.0 FSI and the Porsche Cayenne have been ugly.. Careful what you wish for.
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Techron, perhaps? I read that Porsche techs use this periodically as well:
BG ISC® Induction System Cleaner™ BG ISC® Induction System Cleaner™ will quickly and safely clean fuel injectors and remove hard, baked-on carbon deposits from intake ports, intake valves and combustion chamber. It is designed to be used with the BG 9210 Inject-A-Flush® Apparatus. For complete cleanup, BG ISC® should be used in conjunction with BG 44K,® Part No. 208, added to the vehicle fuel tank at time of service. BG ISC® will not harm gaskets, seals, hoses or any component in the fuel system if recommended cleaning procedure is followed. Catalytic converter and oxygen sensor safe.
Seems odd though, that manufacturers would be rushing to embrace the technology (see the new Infinity M56) doesn't it?