i just had my evo x tuned this saturday using cobb ap. my question is when i go 4th gear and up and step on the clutch for a coupl second my rpm needle goes down to 1000rpm and then fluctuates from 1000 to almost 2000 rpm.then stay to 1200 rpm after a couple seconds.usually before tune it just stay around 1000-1200 rpm when you step on the clutch.is this normal after tune?need advice and input.this is my first tune

 

Normal its when your fan turns on it will go up!

 

i mean my needle fluctuates from 1000-1800 rpm.not just goes up.and then it settles on 1200 rpm. it does it again today even the fan is off.i was driving to work tonight all of a sudden the asc light warning came up and the cel and tried to step on the gas and the rpm fluctuates and it doesnt give me gas.so i pulled over and turn the engine off, start it again it work fine till i reached my work but the cel is still on.i didnt have time to check whats the cel is though.all this things happen after the tune last saturday.

 

Sounds like it's going into limp mode. What mods do you have besides the AP? This sounds like something that would happen from an aftermarket blow off valve or over boosing.

 

mods are:ams ic, hks ic pipes, hks ssqv (recirculated), hks reloaded intake, hks hi power exhaust, perrin dp with cat. does this happenes after tune?its my first went for a tune ever.it was running fine for months before tune no problems.if problem continues can i just reset it to stock ecu?need advice really bad so that i dont have to worry.its my dd...

 

I'm almost certain that the problem is the SSQV. Even if you recirculate it, it still seems to throw codes.

And yes, it'll happen after the tune. When the car is running stock boost or near stock boost the SSQV doesn't seem to cause limp modes. As soon as you tune or raise the boost, all hell seems to happen. I really suggest removing it and throwing the stocker back on.

 

im just running 24lbs of boost,ny stock one was 25.

 

It really has nothing to do with the peak boost, it's part throttle boost that causes it to go off.

 

so , theres nothing else i can do with it but put my stocker on? hks ssqv is done then? what happened if i still use the hks and do vta?

 

I actually have called HKS here in Japan since a few cars I have tuned had the same problem with the SQV. The answer they gave me was, "we are aware of the errors with the SQVs on the EvoX with high boost". "We can only confirm that it will run on a stock boost EvoX, anything other than stock, we can not guarantee that it'll work without errors". Pretty crappy answer huh? So before I tune a car here, I'll always have the person remove their SQV if they have one.

 

so hks ssqv is pretty much useless now with my tune.even if you go vta.if you go back stock map you can use it again ,right. i just feel i throw away my money.used it only for 2 months.

 

it could be your intake also, some cars react different then others.