05 MOntana Stalling AGAIN

[DTNEPA]

At my wits end.Van stalls after driving a bit.Driving and it starts to missfire and chugs once or twice before stalling. After sitting for a half hour will re start only to stall within a short period. Thought i solved the problem LAST year with a new ecm,crankshaft sensor. At the time it only stalled on real warm days. Now its acting up again and wont start for a long time. So today a new battery and a new ignition coil pack.I wasnt getting any spark between the post on pack so thought that was it. Installed the new pack and it fired right up only to die within minutes.Once again no spark(mechanic told me to look for or listen for) Scanned with a snap on scanner and no codes present but did have a crank sensor (A) out of bounds on a test scan...My mechanic is fairly decent and he's stumped and I'm going broke before the hollidays..any thoughts please asap

 

[melsg5]

If a mechanic is the one telling you to replace all these parts you need a new mechanic who has diagnostic skills. You mechanic should have you drop off the vehicle and let it run until it stops and then figure out the cause.
Follow this link for methods to test for a no start condition
http://troubleshootmyvehicle.com/gm/3.1L-3.4L/how-to-test-a-no-start-condition-1

 

[DTNEPA]

He was helping me out over the phone and I had the scanner with me.Another idea he had was a possible wire or plug to the crankshaft sensor.

 

[gibson]

fuel pump