To tap or not to tap?

[D_Eclipse9916]

fwiw, i ran without a o2 sensor for a while. it doesnt hurt your engine. in fact i got better gas mileage that way.

its strange that a cast iron manifold got stripped by a steel sensor, but i guess if it happens a lot on that car then it is certainly possible!

if the wiring fix truely works and has been done then that is actually pretty surprising. A o2 sensor sends oscillating voltage, not something constant, which is why simply using a resistor wont work. I plan on building a o2 simulator with a breadboard and a 555 timer to fix my cel.
edit: i think i misread your wiring solution. n/m. and holy fuck your car has too many damn o2 sensors.

personally id just do the aftermarket headers anyway. easy solution and you're a ricer anyway.

You may have gotten better gas mileage compared to the o2 sesnor being dead and being put into constant open loop mode. You may get close to the same mileage without an o2 sensor, but do you really think that running without a proper o2 is going to allow the engine to compensate fuel trims in closed loop mode properly? You probably wont notice that much of a difference, but the difference is there, the ECU is no longer monitoring so lo and mid fuel trims are going to be a guesstimate on your o2 simulator.

Edit: My vote...do it proper and go ahead get the aftermarket one for more power, as long as its made properly you shouldnt have a problem with a tubular manifold that isnt holding any weight.

You are correct - you can't use an eliminator for the front O2 sensors. The rear O2 sensors have nothing to do with fuel management however - they are only there to measure the emissions after the exhaust has been filtered by the cat. Thus, a car with a bad catalytic converter (like my GL) will throw a CEL if it detects that the converters are not doing their job. Adding an eliminator for the rear O2 will do nothing except fool the computer into thinking that the car is running extra special clean, keeping the CEL off and making the car pass emissions.

Guess I should have specified that I used the eliminator for the REAR O2s :wink:

LOL .... SPECIFY!!! And trust me :wink: ...... I dont run a rear o2 sensor, I know a little more than you give credit for. :lol: