I have a problem with my 98 2.7L trep. I ran a bottle of fuel injection cleaner, went through the entire tank, and at the start of the next full tank I have been having problems. When I try to start the car approx 30-60 minutes after a 30 min drive home from work, the car has trouble starting up. It bogs and I have to give it some gas. Sometimes, I can just turn it off, restart it and its fine. Once it starts running, its fine. At idle RPMS are at exactly 500. It has no problem starting up in the morning. No engine light or oil light comes on. Anyone ever have this kind of problem? I also had the engine oil flushed and replaced with synthetic. It has been almost 2000 miles so I'm going to change it real soon. Do you think my problem could be fuel related? Perhaps the fuel filter needs replaced? How do you check for correct fuel pressure? Bad fuel pump or injectors? What I don't understand is that it only happens at start up and only after a long drive while the engine is still hot! It has 83,000 miles and the timing chain, tensioner, water pump, and oil pump have never been replaced. Still have the original plugs, pcv valve, egr valve, 02 sensors. I don't want to replace anything if nothing needs replaced, but this is starting to worry me.