HAVING TROUBLE DIAGNOSING MY Z71 350 4X4. RUNNING RICH DTC/P0172-175-305-300 FREEZE FRAME DATA-FUEL SYSTEM 1,2 CL-LOAD12.16-ECT197-FUEL TRIMS SHORT B1-23.44 LONG-17.97 BANK2 SHORT-14.84 LONG-17.97 TRIENG TO TAKE AWAY TO ADJUST FOR SYSTEM RICH-MAP(INHG) 14.77 JUST REPLACED WAS AT 10.3-MAF(LBMIN)3.08-REMOVED PLUGS BANK 1 & CLEANED 1,3,5,7 RECENTLY REPLACED CAP ROTORS & WIRES & PLUGS PLUGS DIDDNT LOOK GOOD THOUGH FOR ONLY COUPLE OF MONTHS-THE MAF PID IS WHAT IM TRIEING TO DECIPHER IF GOOD OR NOT I WORK ON FORDS FOR LIVING DONT KNOW MUCH ON CHEVY REFERENCE PIDS.WAS T0LD THESE VORTEC MOTORS HAVE PROBLEMS WITH LOWER INTAKE GASKETS ANY HELP OR INFO APPRECIATED LIKE I SAID EARLIER WORK ON FORDS TO MAKE A LIVING DRIVE A CHEVY TO MAKE SURE I GET THERE.