Hey dude, im having similar problems with my 2zz after i put it in my sedan, cold starts 100% fine but after 5-10 min of running, then trying to start the thing takes a long time, maybe 5seconds for ingition, Hmmmmm, thinking about it now with the fuel pressures i have the 1zz fuel pump running in the 2zz system and i know they differ in design but not so sure for psi? I have also cleaned out the carby, yet to change out the sparkies (on the cards for next pay) and havnt looked at the fuel filter at all.....i'd be really interested in findout out if you can solve this problem