97 skylark stalling - on my 3rd mechanic

stalls at high speeds and when I hit breaks to stop usually happens after driving for a about an hour or when the temperature outside is above 70 degrees celsius

been hooked up for diagnostics shows nothing...might run well for a week then starts happening out of nowhere

has 70000 mi on odometer and is the 6 cyl

nobody can figure it out ....some say fuel pump but pressure always looks good
others say crank sensor

after it stalls it usually starts up fine after a few seconds and then will stall after 1000 feet or sometimes can make it a mile or two

recently stalled 8 times in the span of about 4 miles at all speeds

on my 3rd garage....frustrated ..yep just realized the outside temperature seems to have to be warm ...say above 70 ran fine for a week now it has started stalling again

I think it is the Electronic modulator.

I think it is the Electronic modulator.

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