30K throttle service

[Toyota Technician]

only incoming air goes through ur maf but incoming air and recirculated air goes through ur tb. the pcv system (positive crankcase ventilation) recirculates blowby gas's, the gas's that pass the piston rings on all cars with a combustion engine witch contain carbon then are recirculated through the crankcase, eventually to the valve cover then are dumped back into the intake boot befor the throttal body and in turn clogs the tb. Have u ever wonderd why ur oil turns black well that is the main reason.

i dont see no reason y a oil catch can would stop particulant matter from passing through to the intake unless it has a dense filtering material in it?

a airfilter does not catch all particulant matter it only filters down to so many microns then anything smaller goes right through the af so y couldn't the maf get dirty and knowing that a maf sensor is a variable resistance type of sensor if their was dirt or anything els on the maf could that not change ur resistance value and cause the maf the read incorectly.

[churp]

Originally Posted by Toyota Technician

only incoming air goes through ur maf but incoming air and recirculated air goes through ur tb. the pcv system (positive crankcase ventilation) recirculates blowby gas's, the gas's that pass the piston rings on all cars with a combustion engine witch contain carbon then are recirculated through the crankcase, eventually to the valve cover then are dumped back into the intake boot befor the throttal body and in turn clogs the tb. Have u ever wonderd why ur oil turns black well that is the main reason.

i dont see no reason y a oil catch can would stop particulant matter from passing through to the intake unless it has a dense filtering material in it?

a airfilter does not catch all particulant matter it only filters down to so many microns then anything smaller goes right through the af so y couldn't the maf get dirty and knowing that a maf sensor is a variable resistance type of sensor if their was dirt or anything els on the maf could that not change ur resistance value and cause the maf the read incorectly.

The blowby gasses are carbon rich true...but mainly oil picked up by the hot gasses as they go thru the oil coated rings or thru the valve seals. One of the posts on the oil catch can stated a sizable quantity of oil collected in 500miles!

Oil was the main air filtering agent for the 1st half century of the automobile (until the mid 50's) along with a metal screen that kept the bugs and rocks out of the carburator....not nearly as effective as todays filters, but they worked.

Basically I'm just stating that an oil catch can and the largest area, smallest micron filter you can use could "reduce" the need to clean the MAF or TB. I've driven cars with well over 200K on them that ran fine and never had them cleaned...preventive maintenence is key.

[WMERCERECU77]

At 30K go to Advance auto or other part store, buy a red and white metal can of seafoam fuel system cleaner. Pour 1/4 cup of it into a shallow dish and suck it up a little at a time through your brake booster hose or other vacuum hose through the throttle body. Cut the car off. Wait 15 minutes and start the car and white out the whole neighborhood with a now very clean throttle body. Pour the rest in the tank.

Pour a whole can in your tank every oil change.