Hey guys and gals; Ive done everything I can think of to fix my s-10 blazer; 4.3 tbi. It cranks just fine when it hasnt run for a couple of hrs. If you try to crank after driving,it wont . Also it dies at idle. Ive changed throttle position sensor, fuel filter, fuel pump,oxygen sensor, spark plugs. I'm sure its something simple it runs smooth while its running. PLEASE HELP!