my car is feeling weird... when i punch in the gas petal, it flutters when it passes 10psi.... it seems to not want to go fast no more. any suggestions?....

 

sounds like u have a leak somewhere.

 

I would check all of your vaccum lines for any leaks. Maybe one of the lines has come undone.


Derek

 

What are your mods..?

 

how about some more detail info, instead of some vague discription?

 

boost leak somewhere, check all your hose connections

 

well, i have a 3" catless turbo back exhaust, greddy type s bov, hallman mbc set to 18 psi, walboro fuel pump, and a cone air intake.
i dont know how these mods can make my car feel like this.. it seems to flutter everytime i launch it. i hear a smooth exhaust flow and then it goes to a low fluttering noise and loses power.

 

i checked the hoses, seems like there is nothing leaking... maybe i'll double check

 

one solution.. check you plug wires.. other solution.. make sure there is not water on top of any plug.. if you have water about 10psi is where it will studder and if a plug is off around 15psi is where it will backfire..

 

possible detonation if you are running on 3 cyl.. and one is just getting fuel and no spark.. the higher the boost goes the closer you get to detonation and bam you hit it

 

the flutter may be from your blow off valve. I have the greddy type s too and mine flutters in 4th at partial throttle and in 5th unless full throttle. just put on Injen intake and up pipe and started doing it so may have something to do with your intake.

 

i dont think it is the greddy bov, cause i tried to put the stocker back on and it still stutters. as for the plug wires go, i checked it and it seems to be in the right spots. i am totally confused.

 

Sounds similiar to a problem I have periodically in my Dodge.

it may have a sensor that is going bad or sometimes it can be a bad connection, and if you just unplug and replug a couple times it fixes it.

Do you have any other diagnostic equipment? scan tool, gauges, O2, fuel pressure etc that can help shed some more light on it?

 

oh, and has this just happened suddenly? or been getting worse?
It had been running fine with your mods until recently, or have you made recent changes?

How many miles do you have? Don't rule out a bad fill up of gas, or a dirty fuel filter. you'd see this with a fuel press gauge, though.

 

i don't know what happened. it was running fine for months and then it just started happening. whenever i launch my car hard, boost goes up fine, but when it reaches higher boost, it bogs and studders with a very low noise like a harley. i have the stock intake on with a cone filter and greddy type s bov. i thought it was the stock bov at first, but when i replaced it with the greddy bov, it still happened. could it be the o2 sensor going bad or my high flow cat?... my cel light isn't even on. i am so confused. i checked my spark plugs and they seem to be okay... i have 25,000 miles and just recently changed my oil filter and oil.... replaced my plugs in Dec. last year.