My Colt standard runs fine, but if I let it sit for over a day and
start it up, it will run for about 5 minutes before it starts to
struggle.  After the first 5 minutes, it will sometimes konk out when I
stop or it will sound like it is only on 1 cylinder and struggles to
move.  When this happens, I rev it up in Neutral and then slam it into
gear and it will start to go, but on reduced power.  It seems like
there may be air bubbles in the gas line or something because it
eventually goes back to normal, but this can take a number of tries.  I
have had it in to a few shops and they see nothing wrong and it never
happens for theM(bad timing), but I have had the distributor and plugs
replaced.  Any other ideas or suggestions to help me keep this thing
running?