30K throttle service - Toyota Yaris Forums

Toyota Technician · 08-05-2007, 06:47 PM

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.

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08-05-2007, 06:47 PM	#17
Toyota Technician Drives: 2007 Red Yaris LB MT Join Date: Mar 2007 Location: west virginia Posts: 12	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.