Van stalls,loss of power

ok now understand post
drives find on highway
no car model told no engine told. of 3 made,2.4L
not told if idle fails hot and cold engines./
my guess is hot only. (because cold runs fast idle)
not told, idle fails in all PRNDL gears (of automatic box,if is.)
) fails in drive but not Park or reverse or both.
it is misfiring, spark parts new.
so EGR stuck open or gross fueling errors at idle.

what is mileage on this car/engine? 500KM? 300,000 miles."
?
what is engine RPM at idle failing
does engine stall at idle , hot and cold?
in PARK
?
all I have are questions,. to fix cars we do tests.
lots of test with tool, meters and gauges.
but 1997 I make sure the EGR valves closed 100% at idle.
must.
and IAC works, right, Idle air control.
injector balance tests.
no engine told so no going forward.(specifics)

There are a few possible reasons why your 2003 Mitsubishi Express van might be having a lack of power, losing throttle, and stalling. Bad spark plugs: Spark plugs are responsible for igniting the fuel in your van's engine. If the spark plugs are bad, they will not be able to ignite the fuel properly, which can lead to a loss of power, stalling, and other problems. Bad 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 also lead to a loss of power, stalling, and other problems. Low compression: Low compression can also cause a loss of power and stalling. 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 loss of power and stalling. 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 loss of power, stalling, and other problems. 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 loss of power, stalling, and other problems. 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 loss of power, stalling, and other problems. If you are experiencing these symptoms, it is important to have your van 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 spark plugs and fuel filter according to the manufacturer's recommendations. Keep your van's engine clean and well-maintained. Avoid running your van on low fuel. If you notice any problems with your van's performance, have it checked out by a qualified mechanic as soon as possible.

Did you replace the distributor cap and rotor as well ? Has the coil been checked for signs of arcing, carbon tracking ?

could be electrcal have the wiring checked under the battery and by the injectors plug

Sounds like secondary ignition to me. When was the last time you chenged the spark plugs, cap, rotor, or spark plug wires?

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

did they check that the filter was clean if filter is partly chocked itl allow enough for tick over but starv the engine with open thottle

Have the fuel pressure checked if it is weak,it will cause this .

Try replacing the fuel filter. Get the pressure checked. Check the vacumn hoe going to the MAP sensor.

YOU'RE GONNA HATE THIS BUT IT DOES SOUND LIKE A FUEL ISSUE. HOWEVER HERE'S THE CATCH.....THE FURL FILTER IS IN THE GAS TANK CONNECTED TO THE FUEL PUMP. YOU HAVE TO DROP THE TANK OR TAKE THE BED OFF TO GET TO IT. AND YOU CAN ONLY GET THE NEW FILTER AT THE DEALER. THE LOCAL PARTS STORE DOESN'T CARRY THESE. BUT I'M NOT SURE ABOUT NAPA, THEY MIGHT. YOU MIGHT ALSO WANT TO CHECK FOR A VAC. LEAK AROUND THE THROTTLE BODY. LASTLY WHEN WAS THE LAST TIME YOU DID ANYTHING TO THE TRANS.? MIGHT WANT TO LOOK INTO THAT.

idle air control motor on back of throttle body maybe malfunctioning and not allowing it to idle