some type of fuelcut?/

ive been having this crazy fuel cut on my o7 sti latly
i have no clue as of what it could be
the mods i have done are

cai
catless tbe
pnp uppipe,intakemainfold,tgv deletes pnp,pnp throttle body,
air pump delete.
ap pdx tune.

i was told mabe a overboost fuel cut
my rev limit is set at 7k so i know its not that
and it happens like right around 65k rpm or when i floor it,

i saw a post about the boost pill but i only have stage 2.
its relly gettin on my nerves so if anyone can help

 

First off, the '07 STI's behave to mods and tuning much differently then previous year WRX/STI's. You need to make 100% sure that your tuner is doing everything he/she can to protect your engine. There is a very good thread on nasioc regarding the '07 STI.

I'm going to be honest, I wouldn't trust anyone other then "Gabedude" to know how to safely tune your '07. Unless you have received knowledgeable answers regarding some of the basic changes to knock correction and fueling, you should be very skeptical. A breakdown of these specific changes are outlined here. Even Jorge has currently stopped tuning '07 STI's until all potential issues have been resolved.

I realize all of that was somewhat off-topic, but I feel the need to warn all '07 STI owners of potential engine busting hazards.

As for your overboost, it could be caused by many things. First, you need to pull the CEL.

 

i think you should go back to stock for the time being.....

 

07 sti motors....tick...tick...tick...

 

iam getting no cels when the fuel cut happens

 

Well OK, then it's not overboost/fuel cut. What exactly is the car doing, and at what RPM/gear/speed/throttle?

Does this mean that you are WOT and it stutters at 6.5K? Or are you up that high, then floor it, and it stutters?

There is a "throttle lift" section of the rev limiter on the '07 STI mapping, it removes throttle as you get near redline (unsure if any values are set on the stock mapping). Some tuners may set this to prevent shift knock (especially when users are power shifting/bouncing off the redline).

 

ok this is what happends,
say ill be driving and in 2nd gear, i start to shift into 3rd at say 65k.
right when i shift into 3rd the car stutters and it feels like it wants to stop.
it deff felt like a fuel cut.
when iam up at 65k iam hiting 20psi.
idk if iam overboosting cause pdx wont get back to me.

but this just not seem healthy at all.everytime it happens the car seems to function
a lil less and it did before.

 

Wow! I didn't know that the new 07's rev to 65,000 RPMs. :eek4::laugh::laugh:

 

20 psi? is it just me or does that sound like a little much at 6500 rpm?

 

Yeah, thats probably his max PSI, not what he gets at redline. Still fairly high for a VF39.

Does this happen before or after you have shifted?

Honestly man, if you care about your engine at all, you need a real tune.

 

opps lol yea 65k sorr.. ment 6500. yea i thought 20psi was too high to.
it happens after i shift..

and i contacted jorge about a tune to waiting to hear back

 

He has stopped doing '07 STI tunes, at least until the current problems are resolved.

 

so noone can tune/

 

heard back from pdx today, and they gave me new map for the cel that i had,
they told me my target boost is 20 and peak 22.
but iam peaking 20 as of now