My old boss called and has an 00 S-10 with a 2.2 with a hard start problem when the truck is warmed up. He said it starts OK in the mornings, but if it runs and sits for 10-15 minutes, then it won't start unless you hold it to the floor and it runs like it is loaded up briefly. I went and looked at it yesterday, it doesn't bleed off fuel pressure, it isn't low on coolant (I know they had some head gasket issues), all data looks pretty normal (TPS, ECT, MAF). They pulled the injectors out and nothing is leaking, fuel pressure regulator is not leaking either. Anybody run into something like this??