1993 Toyota Previa Q&A
1993 Toyota Previa Question: mass airflow sensor
Van is jerking in first (man tran)thought it was throttle body hose reclamped it and it lasted 4 months now its jerking again and the hose is still in place aiso blew brand new mopar stablizer links ? - Visitor
even though it is clapmes, it may still be cracked allowing air into the intake behind the mass air flow. how old are the links. they fail from hard driving more than anything. bumpy roads, stress on turns and such. dont be so fast to blame the parts for failure. Roy - mastertech6371
I would start by cleaning the throttle body with carb cleaner and a tooth brush. The check the operation of the throttle position switch. When was the last time the spark plugs were changed and the valve clearances checked. Check for signs of ol at the base of the distributor, if there is oil present and the Previa has high mileage take off the distributor cap and inspect for oil inside the distributor at higher mileage I see the internal distributor seal fail allowing oil into the distributor. - patrick mannion
Occasionally, the mass air flow sensor can go lean and set a code P0170 for fuel system lean. This in not an oxygen sensor problem. If there are no vacuum leaks, the mass air flow sensor may need ...
At higher mileages (125,000+) the mass air flow sensor may cause the vehicle to idle rough, run rich and even stall. It is recommended to replace the mass air flow sensor with a factory unit becaus...