I have read all the "repack your flywheel" post's. I wanted to give the list another example of what could be an issue on the 3.4 engine from 1989 - onward etc. I had a pal with a 348 call me for some advise on the hard hot start. We spoke about the flywheel repack but then I had him stop by for a visual. After looking & listening - and starting the car with the foot on the gas pedal - I took a look at the fuel regulators. Guess what... He had a bad fuel reg on one bank that was sending fuel to his intake. I had seen it before (about 6 months ago) on another F-car. We unplugged the vacuum line from the reg, and the car started perfectly hot & cold (and ran smoother). Replaced the regulator & all has been well. This may have been coverd in the past (I know I have mentioned it here before) so I am sorry if this is old news to some. Just keep this easy fix in mind.