What would cause the vehicle to die at idle sometimes rev over 3000 rpm and sometimes cut out?

There are a few possible reasons why your 4M41 2003 model might be cutting and idling high after 5 minutes. Clogged fuel filter: The fuel filter removes impurities from the fuel before it enters the engine. If the fuel filter is clogged, it will restrict the flow of fuel to the engine, which can lead to a variety of problems, including cutting and idling high. Bad spark plugs: Spark plugs are responsible for igniting the fuel in your engine. If the spark plugs are bad, they will not be able to ignite the fuel properly, which can lead to a variety of problems, including cutting and idling high. Low compression: Low compression can also cause a variety of problems, including cutting and idling high. Compression is the force that pushes the piston down in the cylinder, which is necessary for the engine to run properly. If the compression is low, it will be harder for the pistons to move, which can lead to a variety of problems, including cutting and idling high. Clogged injectors: Fuel injectors deliver fuel to the engine in a fine mist. If the injectors are clogged, they will not be able to deliver the fuel properly, which can lead to a variety of problems, including cutting and idling high. Mass air flow sensor: The mass air flow sensor measures the amount of air entering the engine. If the mass air flow sensor is faulty, it can provide the wrong information to the engine's computer, which can lead to a variety of problems, including cutting and idling high. Throttle body: The throttle body controls the amount of air that enters the engine. If the throttle body is dirty or malfunctioning, it can restrict the flow of air to the engine, which can lead to a variety of problems, including cutting and idling high. If you are experiencing these symptoms, it is important to have your vehicle diagnosed by a qualified mechanic to determine the root cause of the problem. Once the cause of the problem has been identified, the mechanic can recommend the necessary repairs. Here are some tips to help prevent these problems from happening in the future: Change your fuel filter according to the manufacturer's recommendations. Change your spark plugs according to the manufacturer's recommendations. Keep your engine clean and well-maintained. Avoid running your vehicle on low fuel. If you notice any problems with your vehicle's performance, have it checked out by a qualified mechanic as soon as possible.

Sounds like you need to get your Mass Air Flow Sensor checked.

Check the fuel pressure regulator diaphragm.
Do It Yourself Diagnosis and Repair

Plug in diagnostic computer for trouble codes if any.
Check condition of air filter, fuel filter and spark plugs and leads.

Aside from those listed above, other common causes of poor idle or stalling can include the manifold pressure sensor and especially the MAF (mass Air Flow sensor.)

Go to www.hmaservice.com and register your vehicle by VIN #..
you'll then have access to wiring diagrams, shop manuals,
service bulletins, illustrations, etc. To diagnose a 2000 or 2001 1.5L Accent Diagnostic Trouble Code (DTC) P1128 (FUEL SYSTEM LEAN -- PART LOAD), check the following:

• Check the intake system for air leaks.
• Check that the Mass Air Flow (MAF) Sensor (P/N 28164-22610) operation meets the specifications listed below. If the MAF sensor output is significantly lower than the reference value (10% or more), then replace the MAF sensor.

Table 1: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (kg/h) 10
21
30
47
RPM IDLE
2000
3000
4000
Table 2: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
3.5
5.1
7.4
MAF (g/h) 2.8
6
8.5
12.7
RPM IDLE
2000
3000
4000

WITH MANUAL TRANSMISSION

Table 3: Using the Hi-Scan Pro in the Hyundai Diagnostic Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (kg/h) 9.5
19.4
28.8
43
RPM IDLE
2000
3000
4000
Table 4: Using the Hi-Scan Pro in the OBD-II Menus Current Data Screen TPS (%) 0
2.4
3.9
5.9
MAF (g/h) 2.5
5.5
8
12
RPM IDLE
2000
3000
4000

Well you already got the answer, it is the air mass flow unit sensor that is faulty, replacing it and clearing the error codes will solve the problem.

If the car idle on high rpm check if when you will step on the gas pedal over 2500 3000 rpm the car will start shaking and the will die if thats happening then check your mass air flo sensor ,or if there is no air leak that avoid the mass air flo sensor

Could be a few things. IS the check engine on? Could just be a bad mass air flow sensor. Or a seized wastegate. Yuo can start by trying to unplug the mass air flow sensor. If it runs better it could be just that. Just make sure to remove and clean the lower air filter box change the air filter and the snow screen which is located next to the battery where the air enters. These always are blocked. If it runs ok (not perfect change the mass air flow.

my 1988 mazda 626 starts okay then dies everytime it idles down to normal idle speed. i replaced the throttle control sensor and the mass air sensor. i replaced the rotor in the distributor but is still dies. if you throttle up to about 1500 rpm it keeps running. any ideas???

I HAVE TO START CAR TWICE BEFORE IT START,, FIRST TIME IT SURGES AND DIES