Fuel Disappearance, Missfire? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ItzGenX · 10-20-2003, 11:02 AM

Well, my car idles fine pulling -17Hg. The oil somewhat smells like fuel. Does running way too rich cause something like this? My motor was rebuilt and has very little blow-by. My fuel rail and injectors do not seem to be leaking (take fuel rail off, pointing upwards and turn key ign on for fuel pressure).

Also, my car will feel as if it hits a rev limit or missfire when it hits around 5psi and higher. To add to this scenario, during a run through 1st gear and 2nd up to about 4k rpm (hitting up to 5psi and stuttering), my fuel guage will drop all the way down to an inch below E~!

Oh yeah, my oxygen sensor isn't hooked up yet. The car has never done this before. When I have finally put it on the ground and test drove it with new oil change etc after the swap, it ran fine, no miss or anything. Even the fuel guage stayed steady (not drop to the black abyss). After Day 1 of driving it around (about 3 total hours of driving), it began the missing thing along with oil smelling like fuel (not too strong but still). My plugs are probably fouled from driving rich with no oxygen sensor, but could excessive rich also cause my oil to become fuel contaminated by a little normal blow-by?

I have a new/used fuel rail with injectors coming in from Tokyo just in case my fuel is leaking in at higher fuel pressures. Also, I have an oxygen sensor coming in.

My car is a 95' SE with S13 Blacktop SR. My mods are Greddy valve springs, Greddy FMIC, Spec Stage II clutch, and the rest is stock.

10-20-2003, 11:02 AM	#1
ItzGenX Join Date: Dec 2002 Location: Pass Christian, MS Age: 42 Posts: 48 Trader Rating: (0) Feedback Score: 0 reviews	Fuel Disappearance, Missfire? Well, my car idles fine pulling -17Hg. The oil somewhat smells like fuel. Does running way too rich cause something like this? My motor was rebuilt and has very little blow-by. My fuel rail and injectors do not seem to be leaking (take fuel rail off, pointing upwards and turn key ign on for fuel pressure). Also, my car will feel as if it hits a rev limit or missfire when it hits around 5psi and higher. To add to this scenario, during a run through 1st gear and 2nd up to about 4k rpm (hitting up to 5psi and stuttering), my fuel guage will drop all the way down to an inch below E~! Oh yeah, my oxygen sensor isn't hooked up yet. The car has never done this before. When I have finally put it on the ground and test drove it with new oil change etc after the swap, it ran fine, no miss or anything. Even the fuel guage stayed steady (not drop to the black abyss). After Day 1 of driving it around (about 3 total hours of driving), it began the missing thing along with oil smelling like fuel (not too strong but still). My plugs are probably fouled from driving rich with no oxygen sensor, but could excessive rich also cause my oil to become fuel contaminated by a little normal blow-by? I have a new/used fuel rail with injectors coming in from Tokyo just in case my fuel is leaking in at higher fuel pressures. Also, I have an oxygen sensor coming in. My car is a 95' SE with S13 Blacktop SR. My mods are Greddy valve springs, Greddy FMIC, Spec Stage II clutch, and the rest is stock.