HIGH MY 1993 LS400 FAILED EMISSIONS TWICE. HC-PPM FAILED NOX PPM FAILED. BOTH FAILED THE 25/25 TEST BOTH TIMES. HERE ARE MY READINGS SO YOU GUYS CAN HELP ME.
FIRST TEST
25/25
ALLOWED
HC-PPM 126/103
CO .23/57
NOX PPM 808/712
CO+CO2 14.3
SECOND TEST
25/25
ALLOWED
HC-PPM 121/103
CO .24/57
NOX PPM 858/712
CO+CO2 14.6
BEFORE THE SECOND TEST, I REMOVED AND CLEANED THE PLENUM, THROTTLE VALVE AND EGR VALVE OF CARBON. THEN LATER AFTER REASSEMBLY I SEAFOAMED IT TO DEATH.OK WHEN I PUT MY HANDS WITH GLOVES ON OVER THE TAILPIPES THE ENGINE DIDN'T STUMBLE ,PLUS IT WAS SUCKING IN MY GLOVES.I HAVE NO CHECK ENGINE LIGHT. NO CODES ON THE DASH. WHEN I FIRST ACCELERATE TO 1000 TO 1500 RPM AT TAKE OFF, I NEARLY HAVE TO PUSH THE GAS PEDDLE HALF WAY IN. DO I HAVE BAD CATS OR O2 SENSORS? AM I RUNNING RICH OR LEAN. PLEASE HELP IT'S MY WORK CAR!!!
IT HAS 32O K MILES ON IT. BOY I HATE GEORGIA EMISSIONS
DAZZX