My 2002 volkswagen passat shut down while drivingg checked everything car has power cranks put new fuel pump and battery still doesent start could it be th ignition switch or ECM

Question edited for clarity.
Question moved to make model category.

Cranking, rotating, turning is all the same thing. Your vehicle is cranking but not firing /starting / running.

Did you test the fuel rail fuel pressure with a gauge? On a diesel vehicle it is critical because there is so much pressure in the cylinders trying to force the fuel back.

More idea here and videos
https://www.google.com/search?q=volkswagen+passat+1.9pd+does+not+start

..

my advise would be to check for dtcs in the ecm. remember, every gas motor needs gas to run. fuel pump may have gone out. if the car cranks and the timing is ok then i would check for fuel and spark. I have also seen the engine speed sensors go bad and cause the engine to stall at times and also have excessive crank times.keep it simple. air,fuel,spark,timing,compression? check all the basics and i have no doubt you will find the solution to the problem.

After 3 months it is possible the fuel pump has seized up due to the fuel going bad. As of 2 years ago, fuel has a storage life of around 90 days. If the fuel had ethanol in it when it was stored, this fuel stratifies in the tank and the water content sinks to the bottom also ruining the in tank fuel pump.

It is also possible other components may have failed coincidentally and you will need a scanner to pull the codes stored in the ECU to see if other sensors have failed.

When electronic loaded vehicles sit until the battery goes flat.... it induces a lot of false codes as the system awakes and then goes back to sleep because of low voltage fluctuations as battery looses it's voltage.

The ground clamp should be removed from the battery before late model vehicles are put in long term storage to prevent electronic code scrambling .

sounds like a Crank Position sensor. It's hitting at random instead of in tune with where the crank is at any given time. So I say "Yep" to your question "Maybe a new crank sensor?" : )

You may have lost programming to the body control module, contact the local VW dealer to scan the system for faults.

Hi and welcome to FixYa!

You may start on the fuel pump. If the fuel pump is faulty it may not register on the dash. Try to loosen the bolt on the fuel rail and turn on the key but don't crank it. If there's a fuel flow then the fuel pump is fine. If there's no fuel flow then the fuel pump needs replacement.

Hope this helps and thank you for using FixYa! Have a good one!

check battery volts.should be 12.5 volts.if battery dead.your alternator is the problem.your car shut down lack of battery power.if battery good .check for spark at plugs.if yes.you got fuel problems.like fuel pump or pump relay.if you have no spark.problem in the ignition system.

There is a pre fuel pump in the gas tank that you can get to under a round black cover with three screws in the trunk. That pump transfers fuel to the main pump. Sounds like your main pump is starving for fuel. Not sure if this is your issue but its something to check. have someone crank or start the car if possible and listen to the pre pump. If you put your hand on it you should feel it running.

some cars have a problem when you change the car radio it can trigger the alarm system the alarm may think that car was being stollen and kicked in the immobiser which would turn off the starter motor which is giving the affect the batts flat,, plus a lot of the ford and vauxhalls when this happens it also shuts down the fuel pump, or ignition ,, if you have the key pad to lock and unlock car use this a couple of times this can reset the system . if not it may have to go to the main dealer to do a computor check to find fault and may be 10 mins to put right ,, matdav69

there is another fuel pump inside tank,primer pump. check it!