This weekend my truck (01 silverado 5.3L) developed a starting issue. if it sits overnight it starts just fine. But if it sits for an hour or 2 is sits there and cranks for 5-10 seconds then stumbles to a start. If i hit the gas once if finally stumbles to start, it is just fine. If i start it within 10-30 min after stopping it is just fine.

I had a similar issue a while ago. the truck would start then stumble. then Start again and be fine. Many of the similar issues. and that was the FPR, but I replaced that bout 18-24 months ago. Could it be bad again? I haven't had a chance to check the vacuum line yet. But I was going to go to the dealership today anyways. so wanted some input before i buy another FPR.

thanks