What is TSP and MAP? My problem is when the engine is cold and has not been running and the service engine soon light does not light up, there is no kind of light of signal that anything is wrong. Also when doing the fuel pressure test not only did it show 52 psi droping slowly to 48 psi but it drop to 42 psi when I started it, (holding my foot on the gas pedal) which is what it should do according to Haynes manual for Luminas. While doing this it smoked some out the exhaust too.