I ran a fuel pressure check today and it is one psi below spec. I'm wondering if that could be the problem as it only does it when its warm. It was my understanding that a motor needed more fuel when its cold to start as opposed to hot starting where its failing. I haven't had a check engine light since my TPS failed about 9 months ago. I ran a code reader on it and it came up good. Plus I'm not too sure about the fuel specs as they are from Hanes and their GM manuals are a bit generic for a 4-cylinder as they only list one for my truck and I know that there two very different 4-cylinders put in the s-10 over the years my manual covers. Does anyone have a GM's specs on this truck? Thanks for your help again, good questions too I was totally spacing when I wrote the initial post.