Hey guys,
i need some help. today in 2nd gear i when WOT sounded like there was a few back fires and the sputtered and as i let off the gas it stops and when back to normal. never died now.. i dont have a boost gauge to know if i was over boosted. i just changed the spark plugs to NGK to see if that was the problem and no luck still happening. never been tuned. just want to fix this asap any ideas will help
Thanks

Mods-
HKS downpipe
HKS Cat back
AEM intake

 

Sounds like a boost leak

 

check ur MAF sensor..

 

Boost cut usually just kills all power, feels like someone grabbed the *** end of your car. Doesn't usually sputter and backfire more than once or twice.

When did you add the exhaust and intake?

 

i got the car with the intake.. and i got the exhaust about two years ago. was always running fine till this started happening.. all i heard was popping sound about 2 or 3 but i felt it as while just sputter.. like if it was missing or fuel cut or even over boosting.

also what do i look for if i check the MAP?

 

Check your IC hoses, get a boost guage.

 

exactly same problem i got, but only happens when set to high boost level mode on evc

 

So you modified the exhaust on a turbo car and drove around for years without knowing how much boost it makes?
At any rate, here a quick check since you just replaced the plugs. Pull them all out. Gap them down to .020" and then reinstall them. Try to duplicate your problem.

 

I would invest in a WBo2 and boost gauge ASAP bro. And maybe a tune. Just saying my .02

 

Regaped all the plugs to .20 gonna try it now. My question is why now? And i f I get a tune it will fix my problem?

 

A good tune will not only fix issues like these, but potentially could almost make more power and doing so safely.

 

A tune will not fix a boost leak though

 

Took off all turbo piping and checked for holes and put it all back on.. we will see how it runs now

 

Update: on my way home today I opened the car up.. seems like the back firing n fuel cut is gone but at 5k rpms I felt like I hit a brick wall and it cut %100 boost.. and I got an over boost cel... what should I do now?

 

https://www.evolutionm.net/forums/ev...overboost.html

https://www.evolutionm.net/forums/ev...ock-boost.html