Post by
JNM240 »
https://forums.nicoclub.com/jnm240-u395.html
Mon Aug 12, 2002 3:57 pm
Its kinda weird: the car runs normal thru every gear until you get to 5th gear. I could be going 45 in 4th gear and it runs stoich, but as soon as i put it into 5th, it runs super rich (usually 2-4 LEDs into the green on my Autometer air/fuel ratio gauge). This doesnt bother me too much around town, until i get onto the highway, where i run extremely rich again all the way from 60 MPH on up. There is also a complete lack of power at highway speeds, an overpass on the interstate will cause me to lose 5 MPH at the same throttle input. My O2 sensor was new with the header in Jan, as are my plugs, wires, rotor, dist cap. Ive tried adjusting my throttle position sensor thinking it was telling my ECU that the throttle was more open that it really is, but that did nothing. I have an HKS Super AFR to control the idle with my Nismo street cam, but since the car is fine thru all RPMs in 1st thru 4th gear, i cant see how chaning the fuel map would help my problem. Any help would be greatly appreciated.