Today i took my evo above 5k and i noticed that there was smoke coming out of the the exhaust above 5k with WOT

I reall y cant see it during the day but i cant see it in the headlight of cars behind me

My brother was following me home today and he said that he cool smell it through the a/c
He could only describe it as smelling like exhaust

He said i could see the smoke in the headlights also

Does anybody else have this?

Its only during WOT

 

Its unburnt fuel, caused by the ECU running the car very rich at high RPM. Its safe and not a problem, but too safe for real power...

 

Noob here so fogive me if this sounds dumb, but if we reset the ECU would that do anything to fix the cary from running so rich?

 

no it wont

 

the evo ecu is ****ed up i want a ecu upgrade lol

 

hahhaaa...

^_^

 

Your're running too rich. How's your idle is it rough?

 

When I read the subject " Smoke during acceleration " First thing came to my mind that you are very hard on the clutch that it smokes every time you accelerate heheheh....

But that's not the story.. Well as the guys said it is from the unburn fuel .. when the car is on high RPM it runs rich and that is good to keep the engine safe if you are running a little bit more boost.

 

sometimes my idle is rough

it gets rough when the a/c is on (2.0l engine) but every once in a while it will get rough for a couple seconds and then will idle fine
whenever i fill up with gas it gets rough also

anybody else have this?
my evo is completely stock, i dont have an S-AFC or boost controller

 

All the JDM cars, when stock, do this under heavy acceleration. Manufacturers tend be very conservative around high-strung 2.0-litre turbo's when it comes to keeping the motor in one piece for a relatively long amount of time, and running it rich is one of the methods used.

Cheers,

Paul Hansen

 

My car does the samething, I think it could be the way the USDM ECU is tunned.

 

Like 2Cool and Paul Hansen (by the way Paul nice to see you over here) said it's due to extremely rich A/F mixture mapped for safety purposes.

Also the reason it is sooo easy to make more power by properly enleaning the mix with an SAFC or XEDE. Really need a wideband O2 sensor to do it right. That's how get rid of the flat line performance usually encountered above 4500-5000 RPM and make it keep pulling in a linear fashion all the way to red-line.

It's like driving a totaly different car.