Toyota: toyota truck, mass air flow sensor, throttle position sensor

Question
the engine in my truck is idling incorrectly. It's "looping" or in other words it runs really high and then it runs really low. It never dies or stops running. I've already replaced the throttle position sensor but it didn't help. Do you have any idea what is wrong? Parlo Italiano un po. Non parlo benissimo. Se voi mi respondi in italiano va bene.
Ciao e' grazie,
Mike

Answer
Hi Mike!

I'll try in english!
Strange problem... Try resetting your ECU (simply disconnect the battery for about 10 minutes, then plug it in, start the engine without touching the gas pedal, let it run for 10 minutes, and then have a ride with it).
Otherwise check the MAFS (Mass air flow sensor) after your air filter, spark plugs and fuel pump.

Hope this helps!

Ciao,
Jack