So I've had my Zeitronix wideband on for about 2 or 3 weeks now, tuning a little at a time.

Today, on a long highway trip, my car randomly started sputtering bad, whenever I gave it gas. When I put the pedal to the floor, it ran fine, but when it was at partial-throttle, it sputtered terribly. I looked at my a/f gauge, and it read full rich. After a minute of finaggling, it stopped sputtering and the a/f read right at stoich the rest of the ride home.

Since then, I've had to run into town three times. The first two times, it warmed up normally (~30 second warm up time) but once the sensor warmed up, it started reading full rich again and it would sputter. After driving a bit and flooring it, it would go back to stoich and stay there. The last time, I cranked the car, it warmed up, and it went straight to stoich, no sputtering.

So what would make the sensor read a steady voltage like that? Could the sensor have failed? After I get out of class, I'll be tracing the wiring to look for faults...

 

what management are you running, and are you using a stock o2 in addition to your WB or are you feeding a narrowband off your WB to your ECU?

 

I called and spoke with fjo yesterday b/c i have noticed my wideband reading richer latly. He said if I am burning oil that will throw the sensor off. He said the sensor is very senisitive to oil I forget the technical name he used but it is oil. So are you burning oil? Maybe that messed up your sensor.

 

Disconnect the narrowband outpt, and ste the ecu into open loop mode. Then you can see if the wideband O2 is causing the car to stutter, or the car is really running that rich and stuttering...

Or am I missing something?

-PHiZ

 

I'm a dumbass..........

The next day I pulled up the carpet and started lookin at the wiring for the wideband and noticed that the sensor plug was barely sitting in the connector. Apparently my buddy the day before had taken a look at it and decided to unplug some stuff, and left that one only half-plugged.