<table align="left" border="1" width="99%"><tbody><tr><td width="9%">17</td> <td width="23%">feedback system</td> <td width="43%">oxygen sensor output remains 0.55v 10 sec. after F/B system operation beginning</td> <td width="25%">feedback system canceled(for EGI)</td></tr></tbody></table>












I finally got around to checking in on the check engine light. The above info is from the 1300cc.com site. I assume that I need a new oxygen sensor?

I've had this light since I've owned the car (about 6 1/2 months). The bottom of 1st gear is weak, 5th gear has little to no pull to it especially uphill, and my MPG has been low around 17-18 mostly highway/interstate. I've tuned up everything on the car except the o2 sensor. It looks to be a fairly new part currently installed. If I was to rig a volt meter to the O2 wire what should it read at idle?

 

Make sure the wire from the O2 to the harness near the exhaust manifold is ok. If it looks good then the o2 is probably bad. You can use a volt meter to get the voltage, at idle it will vary since our engine run a bit rich. I believe somewhere .5-.8 is normal for idle.

A analog voltmeter would be best as the digital one will fluctuate a lot... A lab scope to graph out the o2 voltage is the best way to go about this. If you use those aftermarket universal sensors, you will still get a code. Make sure to use the O.E. style o2 sensor. Bosch has them, but when you go to the parts store, specify which one you want.

 

I was thinking NGK or Denso. Go big or go home I guess.

 

As a matter of fact, the bosch one will come as a denso inside the box when you get the O.E. style one...

 

plus 17-18 is pretty good for an rx7 , the bottom of first is never gonna have power , rx7 mak great horspower , but bad torque hence the love for high rpms its torque max' out at like 7500 and it aint much

 

Use a meter to check continuity in the wire. Check from O2 connection and at the ecu. It’s a shielded wire, but very thin and they have a tendency to break, but if continuity is good, guess it’s an O2 sensor.

 

17-18 sucks for an rx7. I got 23 out of my first one. 21 out of my project, and current;y 19 out of my modified 1st gen. I've always had great bottom end from them too. Especially the 1st gen with its better gearing.