no cel light???!!!

[mike.p]

okay well first off i have had an ic pipe pop off in the middle of me wot.. and didnt throw a cel light.. would you normally throw one? also after this whole o2 deal i decided to put a old wideband sensor in the place of the front o2 sensor to see if it would throw the code... and it didnt.. i drove around the neighborhood and no light and running great....would it normally come one pretty quick? i also noticed my stock diverter valve was crushed a little.... do you think the car was flashed and the o2 sensor are normally open now??

[TouringBubble]

I don't know of anyone that forces open loop on a basic flash. It's possible that all of the codes may have been disabled, but that's also not a common practice.

Losing an IC pipe doesn't immediately trigger a CEL. All sensors read as normal when that happens, so unless you drive it for a while after and really throw off some readings, then you shouldn't get one.

The same goes for the O2 sensor. You'd have to drive the car until the fuel trims were in excess of 12.5% either way and also trigger a couple more specifics before the CEL would trip, assuming the sensor was still connected to the harness. A few WOT pulls wouldn't make a difference here as all of that is open loop.

[mike.p]

my sensor wasnt connected to the harness......

[TouringBubble]

Front or rear O2? The front O2 should have immediately triggered a code. If it was the rear, the code may be disabled as that is a common one to switch off.

[mike.p]

it did finally come on after driving 4-5 miles...... im just going to go and get a universal boesch o2 and do this.... http://forums.evolutionm.net/evo-how-tos-installations/428553-diy-how-install-universal-bosch-o2-sensor.html

[mike.p]

it worked

[TouringBubble]

Good to hear.

[mike@sargentpower]

I don't know of anyone that forces open loop on a basic flash. It's possible that all of the codes may have been disabled, but that's also not a common practice.

Losing an IC pipe doesn't immediately trigger a CEL. All sensors read as normal when that happens, so unless you drive it for a while after and really throw off some readings, then you shouldn't get one.

The same goes for the O2 sensor. You'd have to drive the car until the fuel trims were in excess of 12.5% either way and also trigger a couple more specifics before the CEL would trip, assuming the sensor was still connected to the harness. A few WOT pulls wouldn't make a difference here as all of that is open loop.

Have to agree about forcing open loop....the is kind of silly. It would totally take away the ECU's ability to monitor itself in closed loop mode. I have done it before on crazy intakes to make sure I was as close as possible in open loop mode without the ECU interfering (on crappy intake designs)....but then I re-enable closed loop. No reason no to!

[mike.p]

is there any way to eliminate all the egr stuff on stock ecu??

[mike@sargentpower]

Of course!

[mike.p]

awesome that is the big thing.. i am so used to aem... that i have no idea what the stock ecu is capable of..lol

[mike@sargentpower]

It really is amazing some of the stuff they are developing in open source these days for these and the Subarus.

[TouringBubble]

Here you go ... http://forums.evolutionm.net/evo-how-tos-installations/453412-how-egr-removal-viii-ix-charcoal-evap-canister.html

[mike.p]

i knew how to take it all of as i did it in my first evo... but i had aem... so as far as not getting a cel light it has to be programed threw the ecu?

[TouringBubble]

Yes. It does.

[mike.p]

damn..lol i would like to do it before i get tuned... is there anyway you can do it touringbubble?? also to run tephra mod do i need a tactrix cable?

[TouringBubble]

Sure, I can help if you just need the Tephra patch and the EGR stuff disabled. Yes, you'll need a cable. I can PM you a price if you want. I also need to know if you're going speed density so I can get you the correct Tephra patch.

[mike.p]

yes please pm me a price.. i will be going sd and i will want all egr stuff disabled. do you dyno tuning also??

[TouringBubble]

I can tune on a dyno if you're interested. You'd have to cover the dyno cost.

[bomjoon]

i blew off LIC pipe hose 3 times at the dragon it didnt throw a code... ecu is like
"you fucking know wtf is wrong stop the cah and fix it bitch~! i aint even gonna throw a code for your lazy ass"

[mike.p]

^lollolol