Can't figure it out!

i bought this truck like a couple months ago and it ran really good for about a month. Sometimes, while I'm driving,(foot on gas) it seems to not get any gas and I watch the rpms go down like it's not getting any gas. Then the engine light came on and I took it to the shop and they said it was the mass airflow sensor, so we cleaned it. Then it started doing it again. So I myself replaced the sensor. Still does it. Then the battery light came on, they said I needed a new alternator so we replaced that. It drove fine for a day and it started doing it again! The mechanic drove it with me in it and it did something new, it stalled when we stopped. He started it up and it drove fine. So it's been at the shop for a week and no one can figure it out. Does anyone know what might be the problem? Please help!!!

 

Is it a Chevy?

 

No a Toyota 4 runner 1999

 

maybe someone in the 3rd generation forum has experienced a similar issue. I don't know how to move a thread but maybe start a new one in that section.

 

posted in your other thread.