M20 oxygen sensor???

[Guest Anonymous]

I am getting to the few finishing stages of the M20 swap many dollars later and I am stumped on something. Do I need an oxygen sensor? I have heard that I do because it won't run without it and then I have heard that it goes into a failsafe mode which doesn't give me a loss of power. Anyone have a clue which is right? Emissions don't matter as I am in Florida and they never check. TIA!

Curtis

[Guest Anonymous]

you need it. it will run without it, but it will run poorly. eap4parts.com has a good price on m20 bosch oxygen sensors.

[Guest Anonymous]

I won't get into the argument vs using a o2 sensor with the proper connector already on, or splicing your own in....but you are super cheap, your most inexpensive option is to use a Ford Mustang 2.3liter, 90-91 (or was that 90-93? either way...) o2 sensor and spice it into your connector. IF you HAVE a connector, that is. I was lucky, someone sent me their dead e30 o2 sensor for free, so I just had to buy the 'Ford' sensor and splice it in.

No wait, I haven't done that either, I'm still running the old crappy sensor and getting bad gas mileage

MK

'72 02/m20

[Guest Anonymous]

While I was waiting for the o2 sensor bung to come in, I did not have it installed.

My experience was this

It idled like horseshit, ran way too rich, and was underpowered off the line. Installed the sensor after the collector--It now purrs like a kitten, runs clean, and jumps out of the box.

[Guest Anonymous]

(nt)

[Guest Anonymous]

URL: http://www.winnsecurity.com/norcal02

Did you have the sensor on it when you showed it off a bit when you stopped by for the carpet that day? ....or is it even better....... 8)

[Guest Anonymous]

I didn't get it in until friday (I think). Sure you can have a ride. I'm back on friday.

Bill

[Guest Anonymous]

It's a huge misconception that the O2 sensor is there to improve emissions, and nothing else. The O2 sensor is the magic that makes an EFI system run right! How many exhaust sensors do you think are on a formula 1 car these days?

The whole reason behind going to an EFI system is to get rid of the approximate air-fuel mixture guesswork provided by a carburettor. The better the mixture, the greater the advance you can run without blowing up the motor, and the more power you get overall. The O2 sensor provides the computer with a critical piece of feedback, so that the air-fuel mixture can be set as correctly as possible. EFI systems will not function well without an O2 sensor; they will often run worse than a carburettor when the O2 sensor is not hooked up, and they are less easily tuned for open-loop than a good carb will be.

So use an O2 sensor. And make sure it's a new one; running an old worn out one just throws off the mixture, which will either cause carbon deposits to build up in your motor, or it will cause the motor to knock and ping.

Mike