I apologize if this thread has been created because I haven't really looked through the threads.

My Camry has had this stalling problems for like 3-4 months now. These problems occur after driving for 20-30 minutes of driving in high speeds such as 60-70 mph. The rpm starts jumping up and down between 250-750 and the car just completely dies. This isn't good because I've almost experienced numerous accidents. The car would stall when I take my exit off of the highway and when I come to a red light or a stop sign. I'm so frustrated with this problem because I've made numerous attempts to fix this problem and the mechanic doesn't seem to find the problem.

From this problem, I've changed/installed:
-Alternator
-TSP censor
-Did a tune up

and none of this has fixed the problem. So if anyone, please can help me out with this problem

 

No, this is not good. I do second this opinion.

Can you read engine error codes BEFORE tossing unnecessary repairs and lightening your bank account?
You mean- TPS? throttle position sensor? what kind of tune up? ever looked at idle speed control valve?

READ CODES. it's free any parts store.

 

What do you mean by read codes?

 

Autozone will hook up a scan tool and scan for a code to locate where the problem is coming from.

Did you change out the fuel filter? , that can cause the car to stall since if it's clogged, gas can't pass through it.

Check the Mass Air Flow Senser and clean it with some Mass Air Flow cleaner. Don't use anything else.