Car idles fine but stalls after driving few mins

Asked by Aug 31, 2017 at 04:01 PM about the 1993 Chevrolet Caprice Base

Question type: Maintenance & Repair

I have a 93 Caprice 305 with 230k miles. It has
been a good runner for the 9years Ive owned until
the last 5weeks of chasing this problem. The
check engine light would go in and out but never
able to catch it  I was doing regular upkeep an
used some Marvel Mystery Oil and it ran great for a
cpl days then it was idling rough and died after I
was sitting in the heat(100°) with the AC on for
about 30mins. Then twice in 2days it died
@redlight but started right up and drove fine
except twice it acted like it was about 2 die when I
made a sharp turn. Next morning No Start. Acted
like it was about to but never did. I changed the
fuel filter that was completely clogged but still NO
START so I looked around some more. Cap,Rotor &
Button less than 2years old looked fine but I took
Ignition Control Module to parts store and it tested
bad. After I replaced still NO START. I then replaced
old Spark Plugs & Wires and taped the 2 cracks in
Vaccum Hose back together and it finally started
and ran pretty good except over 45,50 would run
rough. After I drove about 15miles and on my way
home it stalled. After I towed it home I
remembered I had similar problem years ago so I
replaced the Engine Coolant Temperature Sensor.
It started right up and idles fine but stalls after I
drive a couple mins or miles. I finally caught the
Throttle Position Sensor Code and thinking that
makes perfect since but Im still having trouble
getting started and when I do it idles fine for as
long as I want. I've tried wiggling wires while its
running but as soon as I start driving its not long
b4 it stalls out. Its even shorter distance now too,
only a cpl mins. I've clean IAC Valve as well as
Throttle Body. I think EGR is working because when
its idling and I push in on it, it starts to idle rough
and almost stall. One thing about Im wondering
about is that I found the EGR Solenoid apart and
lying back by distributor. I put spring amd pintle
with metal cap back in how I think it would go. Only
pics I can find show black plastic piece over back
of it though. Im open to any and all sugestions.
Thanks in advance and sorry for the length I just
wanted to be thorough and avoid things Ive already
tried. Thanks again for any help....

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