You could try the EZ link from Auto X-Ray.
I got mine from Autobarn.com fro $350.00
It has the old GM cable, the intermediate, and the OBD2 generic cable.
It has capture function, for intermittant faults.
You drive around with your friend holding the scanner in capture mode, and when
the engine dies, he hits the capture button and it stores the sensor readings
just before and after it died.
It has nowhere near the functions of the REAL $3000.00 scan tool though
Check the shaft on the throttle body for excessive play. If the
bushings or shaft have excessive wear, it knocks the TPS out of cal. and
will cause most (or all) of the symptoms you mentioned. It may seem
like a wild guess but it happens.
I would rather be exposed to the inconveniences attending too much
liberty than to those attending too small a degree of it.
~ Thomas Jefferson ~
EGR Valve stuck open. When you finally get it hot, it unsticks and operates
semi-normally. Pull off the EGR valve, plug the hole, and see if it starts
with no problem. the EGR valve is often overlooked because it seldom goes
bad. IT will not show up on the scanners either.
I'v been through the same thing with a '94 Bonneville. It turned out to
be the crank sensor. It's my understanding that the Mass Air Flow sensor
and the camshaft sensor can also cause stalling. Good luck. I fixed mine
for $24 myself, after spending $395 at a shop.
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