92 yj 2.5 wont start

i have a 92 jeep yj 2.5 that i just redid the whole boby and paint in garage started it all the time to bring out side to dry well im all done now went to start it just turns over checked spark its good check fuel pressure lots of pressure in rail pumping great and still wants to start but wont catchnot sure if theres a sensor im missing or what done many of engines getting confused had it 5 years now never happen before any help would be great thxs

go to www.jeepsunlimited.com More of a YJ base there. this site is more for XJS (cherokees)