Hello I have a 04 Evo that won't idle at all. I replaced the iac still didn't fix the problem. Anything I should try I heard changing the egr solenoid valve would work. Desperate need for help.

 

Probably a MAF sensor. when mine went bad, i had all sorts of idle and drivability issues. i changed spark plugs, Cam pos sensor, fuel pump, MAP sensor and then, it was a bad MAF. it wont throw a code unless it is completely gone. let us know!

 

Will have to give this a try haven't tried it yet.(: Hope it works sucks not being able to drive her.

 

Maf is a possibility.
Also a large leak after the maf. Aka un meterered air.

Huge vaccum leak
Big leak on any pipe after the mass air flow.

Have you done boost leak test?
Is car tuned?

 

I will be doing a boost test most likely today after work and yes the car is tuned.

 

Is the car on e85? Is it dual map? Whats your afr?

 

Dual map. Ahh **** I can't remember.

 

Just asking cause sometimes if the battery is removed it will switch maps so you might have switched to the 91 map or vyse versa. Happens to me all the time.

 

Yea. So if I don't find any leaks what other steps should I take man.?

 

Scan for codes.
Determine whether its lean stumble or over rich stumble. With current data from 02 sensors or a wideband.

Did it happen all of a sudden? Or did u work on the car then it happened? Etc etc. Need more info

 

I scanned for codes nada showed and I was just taking the car to get food and it didn't wanna start which is weird because that morning I was driving it perfectly fine.