Chaps...

Just purchased an E9MR, and it has an A/F gauge by AEM installed. Is there a way to tell if this gauge is wideband or not?

 

There is probably a part number on the back of the gauge. Just slide it out and check it out with a call to the manufacturer or by checking a catalog online.

 

LOL is there a harness going from the gauge to a WBO2 sensor mounted in the exhaust???

 

Does the gauge say lean/rich or does it show numbers?

 

Yeah... I'll get the part number off the gauge. I just figured I'd ask if there was some telltale way to identify it.

I have no idea if it has a sensor in the exhaust. I just picked up the car and haven't had a moment to dig into it that deep.

The gauge face has numbers and a sweeping needle. Not LEDs.

 

yea if its got its own O2 its a wideband

 

its a wideband then. you could post a pic

 

Like they said just see if there is a harness goin to an o2 sensor on the exhaust

 

Roger... I'll take a look for the O2 sensor...

Where would it be located? (aside from on the exhaust?)

 

It should be located on the downpipe right in before the cat or tp. It should also be more toward the top on the downpipe as well (at about 2 o'clock)

 

I don't even think aem makes a narrowband gauge do they?

 

I don't think so either but he will know for sure if the O2 sensor is there.

 

Alright... its wideband. My next question is... what type of values should I be seeing on this gauge? Basically... how do I best utilize it?

 

Ah sorry... the car has UICP, TBE (Buschur with no cat), and a Filter with the airbox removed. All mods done before I got the car (will be getting things sorted on it in the next month or so) but the car was not tuned at all (will also be doing this in the next month hopefully).

 

AFR's are going to vary by throttle input but....

Idle- Stoich (Near 14.7)

Spool up-Shooting for mid 12's usually

WOT-Low 11's

The above usually makes for a happy EVO but many variables come into play (set up, parts, driving style and such...)


There is a "How to Tune an EVO" thread in the ECUFlash forum. Take a look