im having problems with my evo , im using ams upper ic pipes with a brand new hks blowoff recirculating .. and if u r at a complete stop and rev the car the rpms fall like to 400 or 500 and stay there for 5 seconds , the car thries to die , then comes back up to 1000 on ruff idle ........

i tried switching blowofs , same problem
i tried tuning , same problem
i tried the screw on tb same problem
i tried the tps adjusting , same problem


can anyone tell me if they think it could be the iac 1450A069 part number..

i dont have another evo to swap parts with , and dont want to buy a 300 dollar part , with out asking

 

yeah i get the same thing with my car, i think its because i messed around with the screw on the TB.

let me know what you find

 

ok ill let u know what i find ,

anyone else that can help me out please

 

do you have a tactrix cable and laptop to pull your rom? i can adjust something in your rom and you can go ahead and test it out if it fixes your problem.

 

yes i do have this , what do u need

 

<same problem here

 

ok im glad im not the only one ,.....

we really need to get this fixed ...
on my evo its kind of difficult to drive around cause when ur coming to a stop light or just moving the car to park it the idle drops as u let go of the gas pedal , the car idles low then comes back up , it s horrible

 

i 4th this problem, it sux big time...any help would be nice!

 

yea its blows with the QM and wanting to break in a new engine. My car also dies every now and then between shifts. Im thinking its in the tune though. If I find any one thing that stands out I will post up.

 

thnaks man im wondering if its our iac sensor that worn out ....

 

Check for boost/vac leaks. Make sure to check the throttle body seals, I just found I boost/vac leak on mine there.

 

done , still having the same issue

 

still having the same problem


is there anyway to know by seen the sensor if its damaged

 

Search the term IAC motor. I posted how to take out your IAC and check it for wear in an older thread. Can't find the thread from my cell phone. I am willing to bet this is part of the problem.

 

Do you have a boost/vacuum gauge? I had this same problem with numerous intakes. It was a lack of vacuum issue for me. Do you still have your stock rubber intake tube? (i'm assuming you have an aftermarket intake) Throw that back on w/ the filter and maf and see what your idle does. I bet it improves. My car did the same exact thing yours is doing. The car didn't have enough vacuum and would try to die at random shifts and sudden stops. Now it idles perfectly..even with the a/c on!