Originally Posted By: dailydriver
Originally Posted By: Marco620
That stuff works. Used in conjunction with a PEA based cleaner like it says to and it did its job on my GDi Hyundai. No squirrels or chipmunks lost a meal over me getting the valves/throttle body cleaned. Best GDI cleaner on the market!!
How exactly would the PEA based cleaner they suggest (or are they referring to something
other than the SI-1, Regane, or Techron fuel system cleaner fuel additives?
) help clean the backs of the intake valves on a GDI engine setup?
Every person (and tech, mechanic, and tuner) I speak to about the CRC GDI intake tract spray product, who HAS actually used it, says that yes, it does
help somewhat, but absolutely CANNOT clean off the valve backs/stems the way a shell media blasting CAN (and DOES).
Completely true. No modern car with a dry manifold will evenly distribute liquids to each cylinder. Some will get cleaned, others will not.
Also worthwhile to note that both Porsche and Toyota are on record as saying the extra injector(s) in their DI engines are to help with part throttle cylinder filling issues, a known problem with DI in some applications.
And then there are the many DI engines that simply do not cake up at all ever. Seems like some Mfgrs have solved that issue...