I'd like to hear your opinions...
 

The questions I'm talking about are not what I'm curious about, they're from a car club.
I'd like to hear your opinions on this question.
There's someone who owns EVO X MR.
This is an OEM turbo with basic bolt-on components (Intake, Pipes, Exhaust System, Intercooler).
The engine is rebuilt as Forged.
The clutch consists of SSP Stage 1 SIDEWINDER.
The fuel injector is FIC1100cc and the fuel pump is AEM 340lph.
The boost controller is COBB 3-Port.
The map is COBB V3 AP, and it's a custom map.
The Tune result of this vehicle is:
341whp / 346tq / 26psi Boost.
When Tune was first finished, the vehicle was normal.
Normal means RPM, AFR, KNOCKING, POWER, TORQUE, etc.
But after a few years, the RPM of the car is shaking.
For example, it goes up and down to 950-1050, but it doesn't move too much.
(As far as I know, if the MR goes below 1000 RPM, the vibration of the vehicle gets worse, so the tuners know that the EVO X MR starts at around 1000 RPM.)
This symptom gets worse when the weather is cold in this vehicle.
And then some other member said...
There's a problem with the map.
What this person says is that the map is a problem because the EVO X is Theta engine.
Theta engine controls the idling with Throttle, so no matter how much carbon accumulates, it must be very stable to be normal.
And if the idling RPM is set to 1000, the engine brakes fail when driving on the circuit and the feedback of the problem that the vehicle does not stop comes right away.
So if you drive this car on a circuit, you'll be told that the car won't stop.
And if you use COBB V3 AP to tune, you have to put COBB Intake.
If you don't use COBB Intake and do Tune, the idling won't work. (I've never heard anything like this before...)
So if you use COBB V3 AP, you should never use INTAKE from other companies.
And the mapping that this person is talking about is when you pull the ignition timing and when it knocks, scratch it all and make it -0.2 and set the AFR. That's it.
And this person says that the pure ECU is the hardest thing to do.

This is what I think...
I think this vehicle is currently in a country with four seasons, and the nature of the turbo also affects the weather.
Rather than saying that there is a problem with the MAP, it is questionable whether the vehicle did a good maintenance check.
I don't think it's a smart idea to say that there's a problem with the MAP if there's a problem with the vehicle.
If there is a problem with the idling, I think it is necessary to check if the boost is leaking, the vacuum line is leaking, the throttle body, spark plug, ignition coil, injector, gasket, clamp, and other hardware components are fine.
And I want him to know that it's not simple enough to just pull the ignition timing and make it -0.2 when it knocks and just set the AFR.

I'd like to hear your opinions on what this person claims.

You're getting a lot of nonsense opinions and you're at the right conclusion. If you use the COBB AP built-in tunes, you should use the parts they designate but the AP can be used to create custom tunes. However, the overwhelming majority of pro tuners prefer to use OpenPort to tune.

Tunes don't just start having issues a few years down the road. Something isn't working correctly any longer. Plugs, coilpacks, fuel injectors, and vacuum leaks could all cause idle issues along with less common things I didn't mention (some of which you did). Just because there isn't a code (yet) doesn't mean it's not a hardware issue. Good luck convincing this guy though!

Yea it tunes or "maps" don't just go bad after a year or so. It could be alot of things like you mentioned. Maybe even needing a good cleaning of the throttle body.

Clean the maf sensor and throttle body.
also get ecuflash and a tuner to tune it.

Thank you guys for the advice!!
Please share with me more experience and advice for that poor advice guy at the original post.

Yes!!! I do 100% agree with you lol
The reason I make this subject post because I like to prove and show it that "ADVICE GUY" is wrong.
That's why I like to hear you guy's opinion.
Thank you for your advice!

YES!!! That's what I thinking too, but that poor advice guy at the original post thinking something I never hear about...
Thank you for your reply and advice!!!

The tuner already help that guy and told him there's nothing wrong with the map, and the tuner told him to check other hardware if there's anything leaking.
Also make sure clean the TB, Injectors
Thank you for your reply and advice!!

[QUOTE=4g63sk;11929754]The tuner already help that guy and told him there's nothing wrong with the map, and the tuner told him to check other hardware if there's anything leaking.
Also make sure clean the TB, Injectors
Thank you for your reply and


Whats the mileage in the car?

[QUOTE=jrsimon27;11929755]Around 60k miles