just install a AEM wideband in my evo 8...whats a good reading when in idle....in boost......and just crusing.....

 

On pump or e85

Anywhere from like 14.5-15 for idling and cruising and WOT u shouldnt be anything over like 12 optimum would probably be around 11.5 or so. For e85 should be a bit leaner. like 12-12.3 at wot or so.

 

^That.

 

on pump gas.......

 

14.5-15.x at idle. and roughly 11.5 or so at WOT.

 

What if my car runs super lean at WOT? 16 on the spot. The car pulls, and runs great.

 

Stop doing WOT pulls if it's at 16, that is wayyyy lean. Needs to be like mentioned in the 11.5 range if on pump gas.

 

Whoa you need a retune my friend, what gas is that on? And the car can run better than what you think its running if its hitting 16AFR at WOT. How long has it been on this tune?

 

Wow good thing I asked. The car has been tuned like this for about 2 months. I recently went back to the tuner because my boost levels were switched from each map. (pump gas/e85)

This has been on E85. I've noticed it running like this recently the past couple of weeks. I don't do a lot on WOT, but noticed it on the highway when I want to gain speed, onto ramps, etc.

I'll be contacting my tuner this weekend. Thanks guys

 

Could be the sensor thats screwy...16 AFR at WOT = Esplosion. I would double check the gauge and O2 sensor for the gauge as well as getting that tune triple checked.

Edit: Also might be a leak somewhere ahead of the Wideband sensor...resulting in a lean reading. Just a few thoughts...

 

I was thinking maybe he had an exhaust leak

 

Umm. I believe it may be a bad o2 as well after watching the AEM Wideband o2 sensor video posted in another thread. I went for lunch today, and noticed it was over in 10-11AFR.

What gets me is that the sensor has no more than 2k miles!

OP, sorry didn't mean to thread jack. Thank you guys for the info!

 

Ya at 16 it's not gonna take long to break spark plug electrodes and blow stuff up!

 

thankx for the posts guys

 

11.4 WOT is about right.