Hello,

Current setup is 07 with greddy kit, greddy ultimate and 550cc injectors.
Turbo has been on roughly 8k
I started experiencing power loss at boost roughly a few weeks ago.

I was driving up hill in 6th gear at about 65mph and i noticed that there was alot of hesitation (kinda felt like the clutch was slipping), also noticed that the music i had was starting to cut out (as if im losing juice while driving?!)

Happened all through out the night, (loss of power at about 4k rpm)

Automatically assuming it was the clutch, I went in for a clutch replacement.

After the install, on my way home, jumped on the free way and again at 5th gear going about 55mph it started to lose power at 3-4k rpms.

Now it consistantly drives like this, what ever gear im in, when i hit 3k it starts to hesitate and feels like fuel is cutting in/out/in/out....

few weeks ago, i went in for a tune and my tuner kept saying that my A/F was really rich at boost, but when i drive, it clearly bounces of 16/17's (meaning it's leaning out) under normal driving conditions.

So at this point, I'm guessing It could be my stereo system, draining too much juice?
Fuel pump going bad or might have connectivity issues?
Fuel rail?
Fuel Injectors going bad?

I'm going to start from the cheapest to the most expensive for attempting to resolve the issue.

I will try to removed the stereo system today, and take a look at the fuel pump assembly.

Please if you have any insight on this issue or maybe even some suggestions, please post

*also noticed that it's usually worse when the car is cold*

 

cel is p0325 knock sensor

 

Just use a multimeter to read the voltage at the fuel pump... Much easier than removing an entire sound system...

John

 

been reading alot, Im gonna go with injector cleaner first... we'll see how that turns out . any other ideas ?

 

ok... its not spark... its not dirty injectors... could the flow of tue injectors be off? they are fairly new and came with a flow test chart... will be sending them in as a last result

 

Perhaps a bad knock sensor??

 

yes on the knock sensor.. but it doesn't seem to be in limp mode. . .
I can get it past 3k , but when i do it just starts to guggg,gugg as if fuel is being cut ... its worse on the free ways... can't get any power out of her..

another thing is my radio cuts in and out as boost kicks in.. music seems to be clipping as if there is something draining the power

 

This may be a long shot but I had the same thing happen...it was just worse (as far as the electronics cutting out) and I had a large wire coming from the battery to the fuse box (I relocated the fuse box) that had touched the wastegate and melted just enough to arc to ground through the wastegate > manifold > motor but only when I got on it and the motor torqued over and contacted the wire. It was a large wire so it was more jarring. You may have a small wire shorted to the cars frame, or in other words to ground, which is a problem. Check for melted wires...you may also have a bad ground.

 

hey !! i appreciate ur suggestion.... i will check ground right away... any idea how to chk?

 

hey kawi, did you experience any power loss through out the rpm range?

If not, then it may not resolve my issue....