Background.....car runs and pulls hard and strong, I install an amp and sub in the car and go take the car for a ride and as soon as the car starts to spool to full boost around 3,300 RPM/ 12 lbs of boost the whole car sputters/shakes/brick wall effect. I can't describe it other than sputtering ALOT. The car idles fine, drives and pulls fine until 3,300 RPM.

1) No codes are being thrown
2) All the fuses are fine, none were blown out
3) Going to check the spark plugs now....not sure if that would have anything to do with it.

As far as the car, it has a forge unos MBC, Turbo back exhaust, Injen intake...and was flashed by TT when the previous owner had the car. I also check all the vacum lines as well and they are all fine.

This car has never done anything like this before and i can't seem to figure out what the problem is or what to do for that matter. Any help or advice would be greatly appreciated.

Thanks,
-Ray

 

u ground sumthing wrong?

 

Yes, I agree. Check your ground for the sub and amp.

 

I unplugged all of the amp and sub stuff from the battery and ground and it still does the same thing.

 

^^ beleive thats the only solution unless its a coincidence... and something is else is wrong

 

Yea it just doesn't make sense to me....like i said i was driving fine all morning, do the install (have done plenty before) go for a drive and it's messed up, undo what i did and the same thing occurs

 

Do you still have the stock airbox. If so did you pop out the push plugs holding the scoop?

That scoop can lift if not held down and choke airflow.(Has happened to quite a few on here)

 

^^ another good answer

 

Stock air box is not in the car....the scoop is still there but wouldn't restrict anything from the filter.

 

Make sure all of your hoses are tight. IC piping, intake piping, BOV recirc piping, etc. I had a MAF connection come loose on a friends car and it had a similar effect.

 

sounds kinda like fuel cut if "hitting a brick wall" effect occurs.... vacume line off?

 

^^ damn beat me to it

 

^^^ I almost agree with the fuel idea....although why would it drive and idle fine?

I am going to run outside and re-check the hoses and such....thanks for all the replies and suggestions thus far guys I appreciate it.

 

Are the stock plugs in it or did you or the previous owner change them out? I'm fishing here, but check your plugs too.

 

True. Worth a shot.

Id check all lines and fittings. MAF connector. Fuel pump.