The check engine light does come on when key turned for regular starting, but I must admit i did not check to see it comes on when it does not start hot. Today I was looking at the scan tools data to see if i could notice anything when the fault was there. As the scanner was giving data during cranking I would think that that must indicate the PCM was powered. I tried a number of times cranking today and it mostly did not fire. After one try it did run badly for a few secs or so but low revs and stopped. Again left it for 1 hour and it started instantly! I will check PCM and Fuel pump relays tomorrow. I will remove them and inspect. If i could get somwhere a can of freezer spray then cooling these would quickly show that they have the temp promlem. I may go to Home depot as I think you can get freezer spray in plumbing dept to freeze water pipes during repair. What engine parameters should i look at to try an narrow down this fault?