if u have a bad o2 sensor whats the signs of it being bad? my car sometime fells like its runnin out of gas and cuttin out and everthing is good checked the timing is dead on the plugs are new wires are new dizzy cap is new rotor button is new fuel filter is new so what else could it be and i have a 1989 crx with a b16 with just bolt on stuff so please help me out?

 

How is your gas mileage?

 

i would like to know this too

 

umm like about miles per gallon or what if thats what u askin im not really sure but it does seem like im gettin alittle less than before but not sure

 

make sure your not running just one sensor, or 2 wires to just one sensor, the idle will drop, it will hesistate during consistant throttle, and gas milage will be ****. if you are running an aftermarket header make sure you have 2 oxygen bungs welded in the top part of the header. there is a thread on this page or the next about that exact same topic.

 

yeah i have an aftermarket 4-1 header but theres only one place for an o2 and i have a full tsudo exhaust and when i got it it had a plug in it so why is it important to run 2 o2 sensors? thanks

 

So why is it important to run 2 o2 sensors?

Its important because that is the way the car was designed. Now your unplugged O2 sensor is giving the ECU incorrect feedback.

Bottom line... your ecu is seeing a lean condition, and compensating by adding fuel when it really isn't necessary.

 

well i have a vafc and its tuned with a wideband o2 so i guess its right for one o2 right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crxfreak1117 &raquo;</TD></TR><TR><TD CLASS="quote">well i have a vafc and its tuned with a wideband o2 so i guess its right for one o2 right? </TD></TR></TABLE> No, your ECU is still looking for two seperate oxygen sensor signals.

 

easiest thing for you to do would be to convert to odb1. Iam finding out the hard way by staying obdo and butchering my 4-1 header by welding in 2 o2 bungs.

 

im in the process of converting it to obd1 lol i have the conversion harness but i need the dizzy does anyone have a obd1 vtec dizzzy for sale