
Originally Posted by
jick.cejoco
how did the service advisor know there is carbon build up in the combustion chambers? is he a fengshui fortune teller? any rational knowledgeable technician would investigate the condition of the chambers using a
high definition videoscope looking directly into the combustion chambers or use a digital storage oscilloscope and analyze the secondary ignition waveform when the engine is running. otherwise, he is selling false sense of performance improvement. do not buy unnecessary service unless there are tests done and there are proofs or digital printout from a diagnostic tool or equipment