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- #141
Extremely Easy Intake Cleanup After Catchcan Install
Fellas, I debated whether I should start a separate thread on this but yesterday I started a small tune procedure that I do before spark plug replacement. It has been 20K miles since my PM HG job from the master and as such two spark plug swaps (Safari recommends 10K interval). At 10K my intake was still so clean I did not do this tune procedure that I "always" do anyways ... I simply spray some BG Air Intake Spray (1/2 can in small increments) through the throttle body and into the intake plenums and then spray some more through the PCV hose inlet. I have always done this mostly to clean the throttle body and not so much to clean the intakes because as mentioned above in all the other posts our intakes get so frickin filthy that the BG spray simply makes a minor dent in all the crap collected past the throttle body where more heat helps to make the crap collected much more stubborn.
After the catchcan install and after approximately 20K miles since the HG job where plenums were totally cleaned throughout I noticed some "soot" collected on the backside of the throttle plate and all through the intake plenums (flexible light scope helps here). It was not enough to even buildup much more than dust on a shelf after a month or more but it was enough to see. I noticed that unlike the previous crap collected in the intake system prior to the catchcan installs I could easily "erase" the soot simply by wiping my finger over the backside of the throttle plate so I decided to do the BG treatment of old and see how that helped. To summarize, I was absolutely astonished by how rapidly and how completely it came off, all of it, after only two tiny squirts of the BG spray through the throttle body and two tiny squirts of the BG spray through the PCV hose inlet which was probably pretty unneccessary anyway at that point.
My theory is that without the oily "glue" that comes from the crap that the PCV system throws through the intake system, the EGR soot alone simply cannot collect much and simply cannot cope with any solvent spray whatsoever. Heck, I'd venture a guess that even water injection would completely clean the intake system's innards. It is an amazing difference due to the catchcans that I thought I'd pass along as hopefully helpful to others.
Fellas, I debated whether I should start a separate thread on this but yesterday I started a small tune procedure that I do before spark plug replacement. It has been 20K miles since my PM HG job from the master and as such two spark plug swaps (Safari recommends 10K interval). At 10K my intake was still so clean I did not do this tune procedure that I "always" do anyways ... I simply spray some BG Air Intake Spray (1/2 can in small increments) through the throttle body and into the intake plenums and then spray some more through the PCV hose inlet. I have always done this mostly to clean the throttle body and not so much to clean the intakes because as mentioned above in all the other posts our intakes get so frickin filthy that the BG spray simply makes a minor dent in all the crap collected past the throttle body where more heat helps to make the crap collected much more stubborn.
After the catchcan install and after approximately 20K miles since the HG job where plenums were totally cleaned throughout I noticed some "soot" collected on the backside of the throttle plate and all through the intake plenums (flexible light scope helps here). It was not enough to even buildup much more than dust on a shelf after a month or more but it was enough to see. I noticed that unlike the previous crap collected in the intake system prior to the catchcan installs I could easily "erase" the soot simply by wiping my finger over the backside of the throttle plate so I decided to do the BG treatment of old and see how that helped. To summarize, I was absolutely astonished by how rapidly and how completely it came off, all of it, after only two tiny squirts of the BG spray through the throttle body and two tiny squirts of the BG spray through the PCV hose inlet which was probably pretty unneccessary anyway at that point.
My theory is that without the oily "glue" that comes from the crap that the PCV system throws through the intake system, the EGR soot alone simply cannot collect much and simply cannot cope with any solvent spray whatsoever. Heck, I'd venture a guess that even water injection would completely clean the intake system's innards. It is an amazing difference due to the catchcans that I thought I'd pass along as hopefully helpful to others.
BTW, the amount of crap collected on the turbo side is an incredibly small fraction of what is collected on the PCV side so don't wait for FI to do this mod. HTH. 
