Hi guys I have a 08 evo x and I’m having a issue with it running lean on idle and hesitating while Accelerating it only hesitates for a few seconds then drives normal also have a issue after the car is warm and I park somewhere turn the car off and come back out and start it I gotta give it gas and rev it for a good 10 seconds before it idles on its own
I changed all the o2 sensors and the maf sensor, checked for boost leaks and vacuum leaks and can’t seem to find any
I’m pretty stumped and it’s been bothering me I can’t figure it out😂 I got spark plugs on order just wonder if you guys have any insight.

 

Is it all stock? If not what mods and is it tuned?

 

My bad I forgot to mention my mods
it is pro tuned on 18psi

fp red turbo
external watergate dump
full exhaust from turbo back
FIC1050 injectors
AMS fuel rail
DW300 fuel pump
injen intake
4” intercooler
3p intercooler piping
tial bov
stage 2 clutch

 

I would log your EX MIVEC, it should be around 0/-5 at warm idle.
Another thing I would check is the injectors

 

Check the pcv valve

 

Got new Pcv valve, injectors cleaned, and a smoke test for vacuum leaks found about 3 vac leaks fixed 2 of them there’s one large one coming from the exhaust manifold side I was thinking the manifold is probably cracked but didn’t see any and can’t seem to locate the exact spot of the crack but definitely gonna get a new manifold soon