Hi there bros, i want to ask about our corolla's hard starting, it's been 2 years i think so,
Car before can still idle all by it self tho still need to give some throttle that was before,
Now like for 6 months, it's really hard to start, i mean i still need to assist it to step in the throttle pedal
for about 3 to 6 minutes till the engine properly reach it's operating temperature.

We have scanned it already even "no check engine or no miL is on", 
all sensors are working good after OBD2 live stream data, (but only in normal operating temp)
my friend as a specialist told me to clean or replace the iScv which he think the only one is faulty,

We have cleaned the whole throttle body also.
I then cleaned it thoroughly and still got the same issue after days.
So should i get a new one, you think guys?
Or there still a better way of cleaning it,
If i get a new one, are after market brands ok with this kind of car electronic thing?
Or it's best to get an OEM part of iScv?

THanks for reading, hope to get an answer soon, thank you !