2002 Chevy Camaro V-6 code P0174

Question

California, 2002 Camaro V-6.
P0174
Changed 02 sensors and cat converter. Changed PCV gasket, sprayed carb cleaner around intake/plenum mating surfaces, no change in RPM at idle.

Scan tool shows
Calc Load - 10.2, ECT - 188, STFT B1 - 0.00, LTFT B1 - 17.97, STFT B2 - 3.91, LTFT B2 - 17.97
MAP - 17.42 hg, RPM - 1398, Speed - 5, MAF - 2.44 lb/min, TPS - 19.22

Not sure what else to do. Smog check due next month. Please help.

Answer 1

P0174 Fuel trim too lean Bank 2

Fuel trim Bank 1 STFT  0.00 , LFT   17.97, Bank 2 SFT 3-92, LFT  17.97. This is adding fuel , take a fuel pressure test, the specification at key on engine off should be at 48-54 psi. Also check the EGR valve at idle the EGR should not be hot to touch as that can indicate a EGR leakage.

 Check the EGR data see if the desired and actual EGR position is in range..