I have a B16a in a 91 LS and i have been running my car with the check engine light on for almost 2 years now. If i have caused damage to my engine what's the worst that can happen?

The code it's throwing is for the O2 sensor.

 

your wasting alot of gas

 

Beside that problem, anything else???????????????????

 

Running rich will clog you cat and in turn create extra backpressure, robbing you of HP

 

Buy a damn O2 sensor. Your car must run like garbage.

 

Maddddd money going out of your exhaust!

 

like he said only possible clogged cat and the extra gas money your throwin away you would have been better off buyin an 02 sensor and the fact that the cars in limp mode now and runnin like total garbage

 

If youve got an O2 code, Technically you might not be wasting gas. You might be running lean as all hell. Is your engine knocking at all? PING!

Back probe the o2 sensor while the car is running and get a voltage drop with a dvom- Should be around .6-.7 If it is above that then your wasting a buncha gas, If its below that your engine is prolly knocking like a b@stard and your running lean as hell..

 

99% of the time when an o2 sensor goes bad the car runs rich... because it goes into limp mode for that simple reason as to not damage the engine and run lean therefore it runs rich

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Raw B &raquo;</TD></TR><TR><TD CLASS="quote">Running rich will clog you cat and in turn create extra backpressure, robbing you of HP</TD></TR></TABLE>

not only that, but running really rich for 2 friggin years has possibly done ring damage since too much fuel has the possibility to wash all the oil off the cylinder walls and makes the rings get all ate up then you lose compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">

not only that, but running really rich for 2 friggin years has possibly done ring damage since too much fuel has the possibility to wash all the oil off the cylinder walls and makes the rings get all ate up then you lose compression.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">not only that, but running really rich for 2 friggin years has possibly done ring damage since too much fuel has the possibility to wash all the oil off the cylinder walls and makes the rings get all ate up then you lose compression.</TD></TR></TABLE>
This is true. The extra fuel goes straight into the oil and gas dissolves oil( not good).

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redface &raquo;</TD></TR><TR><TD CLASS="quote">99% of the time when an o2 sensor goes bad the car runs rich... because it goes into limp mode for that simple reason as to not damage the engine and run lean therefore it runs rich </TD></TR></TABLE>

It doesn't go into limp mode, it stays in open loop mode. The stock maps are tuned around 12:1 at 14" of vacuum and less, so you are wasting fuel, run the risk of excessive cylinder wall wear, and could be causing your oil to break down faster.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JeffBro &raquo;</TD></TR><TR><TD CLASS="quote">
This is true. The extra fuel goes straight into the oil and gas dissolves oil( not good).</TD></TR></TABLE>

And that also creates acids which etch bearings.

 

The problem with "just put a new o2 sensor" is that i have a pre obd engine, and the shop that did the wiring on my car said they accidently throw the stock headers that came with my jdm b16a away. So good thing for me that a friend of mine happen to have a usdm b16a1 and let me have his stock headers . So i did notice that the o2 sensors are different and i have no idea on getting this problem fixed. I have a set of DC headers for a b16a that has a o2 sensor already on it but it's a 4 wire and i believe my engine came with 2 single wire o2 sensor's. Do i need to change to obd1 or just buy a set of pre-odb headers, or is it possible to use my DC headers???????????