Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum - View Single Post - Lean Conditions-Long and Technical

idlafie · 12-31-2006, 06:55 PM

Pac,

Did you inspect your catalytic converter?? Hi NOx could be due to a blocked catalytic converter or restricted exhaust system.

What about the pipe that runs behind your KA engine block connecting the exhaust back to the EGR valve?? Carbon buildup in the pipe & the EGR valve could also cause your hi NOx readings.

Try 'em both.....can't hurt. Beats pulling the fuel pump!!

ID

12-31-2006, 06:55 PM	#7
idlafie Zilvia Addict Join Date: Mar 2004 Location: ..So Cal.... Posts: 940 Trader Rating: (0)	Pac, Did you inspect your catalytic converter?? Hi NOx could be due to a blocked catalytic converter or restricted exhaust system. What about the pipe that runs behind your KA engine block connecting the exhaust back to the EGR valve?? Carbon buildup in the pipe & the EGR valve could also cause your hi NOx readings. Try 'em both.....can't hurt. Beats pulling the fuel pump!! ID __________________ Weekend Mechanic for my Not-So-Mechanically-Inclined buddies....