sv51macross

iTrader: (1)

So, I'm looking to spend some birthday money, and think I've settled on this:

http://www.aemelectronics.com/wideba...nalog-face-770

For a couple reasons;
1, I hate the way the other wideband controller they sell looks and this has a lower AFR floor.
2, The stock O2 sensor setup just isn't working. For some reason or another, there is a 64ohm difference between the bung and the block, and I want to wait until I can afford the Corksport header to replace the manifold.

The idea is to buy this kit, install it, and hopefully the controller would have an output or something to connect to the stock O2 sensor wire/input. Does this gauge kit have such a provision (narrowband output)?

arghx

iTrader: (3)

I had the AEM digital display one a while back. I like this analog one better. I've used it while tuning someone's car and I was happy with it. The analog needle takes some getting used to (if you've been using digital display) but like any analog needle, it responds very quickly and you don't have to be concerned about a refresh rate.

I question your diagnosis. If there were an open circuit between the o2 sensor and the ECU you would probably throw a code. There would also have to be some kind of melted or hacked up wire, or a dirty connector causing the open circuit. If the sensor it self were bad you would have to hook an oscilloscope or at least an analog voltmeter to it and watch the waveform of the o2 sensor:



If you really think you have a problem with your factory O2 sensor then you should just get another one. You can get them at autozone for what, $20-$30 ?. They're all oldschool 1 wire Bosch sensors and they are not very expensive. There's not really much point in even trying to diagnose the sensor itself. It would be easier to just swap out the sensor.

This model of the AEM wideband does not have narrowband emulation but the one with the digital display does. In my experience narrowband emulation doesn't work as well as the real thing. One of the reasons is that the factory wire is actually shielded but an aftermarket emulation signal isn't. Why would you go and pull your fragile interior apart and then cut a shielded wire on the engine harness so you can run an unshielded emulation signal?

There is nothing wrong with the factory narrowband system. If the sensor is bad, or at least old, then replace it. If the harness is damaged then repair it. If you buy this AEM wideband then you should install it in a separate bung that is farther from the exhaust ports because the sensor is more sensitive to heat than the factory narrowband.

sv51macross

iTrader: (1)

I replaced the original O2 sensor and it didn't do anything. Unplugging the O2 sensor didn't change anything. No codes, it just would run open-loop constantly. I ghetto-fabbed a jumper wire to re-ground the O2 sensor and hooray!, mileage improved and I got a fair bit of power as well. But, because I cannot find a big enough spade/loop connector, the jumper is just copper wire looped under the sensor itself, the copper cooks and corrodes, and quickly looses efficacy. No other wiring is at fault, because I tested the O2 connector to the ECU pin and it's just fine. Since clearly it is the manifold, and I want to wait to replace it with the Corksport piece, and I want some interior decoration, I thought the UEGO would be a good start.

Another option would be just to buy an O2 sensor with two wires coming out of the top instead of one, but like I said, I kinda want the interior decoration, and I thought a wideband gauge would be useful later down the road (aftermarket EMS)

You say shielded wire; my intention would have been to route the emulation signal back down the O2 sensor harness and hook-up with the stock O2 sensor connector; no piercing shielded wire.

Finally, and please correct me if it is wrong, but the Wikipedia article on AFR meters says that wideband sensors are not dependent on heat as narrowband sensors are.

[PS] I don't have access to an oscilloscope.

sv51macross

iTrader: (1)

Hello?

sv51macross

iTrader: (1)

http://www.nopistons.com/forums/topi...s-wideband-o2/

Post #12, someone says wideband O2 sensors last about a year; is this @ stock location or at the collector of a tubular manifold?

D Walker

iTrader: (1)

The newer "analog" looking AEM wideband is likely the most accurate wideband currently on the market, so its a good choice.

I have had wideband sensors last for several years, but this depends on proper installation and the fuel used. With leaded fuels the life is shortened quit a lot, and in cars with a lot of vibration or that bang thier exhausts on the ground the sensor can die sooner. The sensors are under $100 these days, so not really a big deal to replace anyways, unless your doing it every few weeks.

Hope that helps.