I've been reading this newsgroup for years now, enjoying the helpful advice.
I've gotten to the end of my rope with this particular problem and I'm
hoping someone out there can help.

I have a 1995 GMC K2500 with the 5.7L TBI.  The truck starts fine when its
first started in the AM (cold engine).  After the engine gets hot in the
summer and I stop the engine, it will re-start right away with no problems.

However, if I let it sit for say 20-30 minutes, it will be hard to start.(1)
I can crank it and it will not start.  I continue to crank four or five
times and it will begin to run, but will be very rough.  AFter about 3-5
seconds after it does start, the engine will rev-up to 2000 RPM and smooth
out and back down to regular idle.  Once it starts, I can turn it off and it
will start right up.  When it's running rough, there is no black smoke that
I can see, just a rough idle.

(1) If I let it sit for 45 minutes or longer, it will start right up with no
problems.

I've done the following:
-Replace plugs
-New wires
-New distributor
-new primary ignition coil
-new fuel pump
-new rotor and distributor cap
-replaced the injectors
-replaced the fuel pressure regulator

Someone said something about a coil under the distributor rotor.  Tried to
get to that and replace it but couldn't get the bolts out.  I was afraid I'd
break them off.

Oh wise group, please offer me any help you can!

Dave Hill