Stalls at idle and in traffic - 1999 Toyota Camry

Could be many things-- dirty IAC, bad MAF, bad tune up items, O2 sensor, clogged exhaust, bad TPS.

Clean throttle body and idle speed control valve.
Re- learn the idle speed control valve.

what model mazda?? check for a cracked air intake hose air filter to throttle body replace if cracked. It should only be idling at 750rpm

Hi, car stalling problem often means the engine is not getting enough fuel and/or too much air. A cold engine needs a fairly rich fuel mixture to start, and to idle smoothly while it warms up. Any of the following could cause or contribute to this kind of stalling problem which i would not want to exaggerate until i get a clear picture of how the car stalls.

Does your engine stalls when you stop for a traffic light or when idling, or your engine just stalls unexpectedly while driving?
Answering the question will help me determine the cause of the problem.

MOST OF THE TIME BEST TO LET DEALERSHIP REPROGRAM IDLE BECAUSE STALLING AND WAITING FOR CAR TO RELEARN TO IDLE.CAN BE DANGEROUS.FOR A CAR STALLING OUT AROUND MOVING TRAFFIC.

check your vaucumn hoses for leaks any leak in that system will effect your fuel pressure regulator and fuel rail that controls the running ability

when you disconnect battery your pcm loses it memmory. it has to relearn its program.its going to keep stalling until it relearn to idle .take it to dealer to reset relearn idle on pcm.it would be safer.because stalling car is dangerous in traffic.

i found out from dealer there was a service bulitan for this problem. mazda reprogram the ecm for idle speed contorol . problem solved.

thank you

the throttle position sensor may be bad or you may have a vacuum leak

You have one of two very common problems.
Number one may be a stuck open EGR valve
Number two would be a failing Idle Air Control valve (IAC).
Try this: Open the hood & locate the EGR valve, close to the firewall, behind the intake. Find & take with you a small hammer. The next time that it happens, open the hood & tap on the EGR valve. If it is sticking "open" the tapping may dislodge the carbon particles that are keeping it open.When the EGR valve is open, exhaust is getting into the intake at idle, and this will def stall out the car.
There is no repair to the IAC valve, it would need to be replaced if it is bad.
One of these two scenarios will cure your problem, I see it every day.