My ls vtec is having idle problems after i turn on the car and drive for about 5 mins and stop it idles at like 100-200 rpms and then have to sit there for about 2 mins for it to go back to normal sometimes when i turn off the car and start it back up it runs fine sounds like a ecu issue its a chipped ob1 ecu with a ls vtec map runs well but sometimes idles like crap not good for the motor to idle like that its not turboed

 

I got the same problem, does the check engine light come up ?

 

does it surge when it idles that low or just sit there at 100 200 rpm