I have been over several of the threads here & applied some of the advice there but problem persists. Started having trouble with warm starts bout a month ago - it would start fine first thing in the morn & after work no problem. But, if I drove it hard for a bit & shut it off for more than a minute, it would not start. It would crank over pretty well for quite awhile(15-30min) & finally after seeming to cool down a bit it would sputter a few times finally catch & start up. So after perusing the forum for a bit for similar issues, I changed out the coolant temp sensor which seemed to have no effect, next swapped out coil for another, cleaned & checked most of the connections, & checked that I had a good fuel pressure on the downstream side of the fuel filter. Still has problem - also seems to steadily be getting worse & now it does not necessarily start cold either.
One thing that has got me thinking: one time after having cranking it for 1/2 hr or so, the battery was finally getting low so I got a jump start from another vehicle - whamo! Instant start! ... no sputtering or anything just started right up! Did the same thing one other time... so I am thinking: the battery seems to have enough juice to crank it over fine but maybe the coil is not getting enough juice until I added power from the other vehicle? Or is there some relay not kicking until the extra juice hits it? Just a bad battery?