running rich? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ibanezxguy · 05-28-2002, 11:37 PM

I believe im running rich... i have a nice black carbon build up in my exhaust pipe and im sure its coated my whole exhaust system valves and all. But is this a sign of running too rich?  I also get little puffs of smoke when i take off.  Im dont seem to be burning oil or anything like that.  But if i am running rich how do i make her run a little leaner?

S13Grl · 05-29-2002, 01:35 AM

*Belongs in Tech*

-----------------

If you believe you are running too rich, you should be able to notice the "richness" in your gas mileage. Figure out how many MPGs you get, but still smell around your engine bay and look around on your intake manifold. If it reeks of gasoline, you may be running rich.

Your problem might be:

a) a defective fuel pump
b) a mistake in the ECU
c) you may have a clogged air filter or a dirty air filter which would cause you to run richer (less air, same fuel) or your throttle valve might not be functioning properly...

What year is your car?

Any mods?

05-28-2002, 11:37 PM	#1
ibanezxguy Zilvia Member Join Date: May 2002 Location: Augusta,Ga Posts: 176 Trader Rating: (0) Feedback Score: 0 reviews	I believe im running rich... i have a nice black carbon build up in my exhaust pipe and im sure its coated my whole exhaust system valves and all. But is this a sign of running too rich?  I also get little puffs of smoke when i take off.  Im dont seem to be burning oil or anything like that.  But if i am running rich how do i make her run a little leaner?

05-29-2002, 01:35 AM	#2
S13Grl Married to the Mob Join Date: Dec 2000 Age: 44 Posts: 3,670 Trader Rating: (0) Feedback Score: 0 reviews	Belongs in Tech ----------------- If you believe you are running too rich, you should be able to notice the "richness" in your gas mileage. Figure out how many MPGs you get, but still smell around your engine bay and look around on your intake manifold. If it reeks of gasoline, you may be running rich. Your problem might be: a) a defective fuel pump b) a mistake in the ECU c) you may have a clogged air filter or a dirty air filter which would cause you to run richer (less air, same fuel) or your throttle valve might not be functioning properly... What year is your car? Any mods?