Strange Acceleration - Subaru WRX Forum
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post #1 of 22 Old 05-14-2012, 09:17 PM Thread Starter
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Strange Acceleration

Hi Guys...

I have a strange thing happening
When I hit the gas hard the car, what it seems like, is going in 2 stages.
Smooth acceleration till around 5k rpm then it almost feels like a very fast
loose of power then the car pulls again.
I mean its in .5sec but i can feel that double punch.
Anyone knows that that could be?
2012 wrx 1120 miles on it with Perrin intake

Paul W.
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post #2 of 22 Old 05-14-2012, 11:58 PM
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Did you tune it


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post #3 of 22 Old 05-15-2012, 07:00 AM
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Take it back to the dealer

Paul
2002 WRX Sold
2007 WRX Sold
2007 STi totaled
2007 Foz XT sold
2007 MS3
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post #4 of 22 Old 05-15-2012, 08:37 PM Thread Starter
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Nope no tune
I was told Perrin CAI dont need a tune but now im findin out
I do

You guys the that the intake makes that double pull?
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post #5 of 22 Old 05-15-2012, 09:38 PM
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It potentially could. I know that Perrin has an AP map for their intake.

Take the intake off, reset your ECU, drive around for a little while to let the ECU learn, and then try it again and see if it still does it.
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post #6 of 22 Old 05-17-2012, 09:54 PM Thread Starter
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update..

I drove the car today and i did some hard pulls and the double pull is gone..
I this the computer just had to adjust the difference
The car run normal now
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post #7 of 22 Old 05-19-2012, 12:00 AM Thread Starter
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another update

Just installed the GFB BoV, the 1 i cant change to full circ or BoV
so far car run very nice
at low boost at 3.5k i get a little fluffier but i was told that its oki
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post #8 of 22 Old 05-19-2012, 10:46 AM
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I would still look at a tune for the Cai man. With the way these cars are tuned from the factory you are pushing your luck. Just saying.

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.
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post #9 of 22 Old 05-19-2012, 12:34 PM
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why do people never read?

take the intake off before you blow the motor, and get a tune ASAP with or without mods.

the OEM tune is junk and knocks like crazy. the pulls you're feeling is a knock event and the motor pulling 2-4* of timing and then giving it back to you. that more then enough to blow a piston ringland.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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post #10 of 22 Old 05-19-2012, 06:28 PM Thread Starter
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I can keep all the parts and just get Cobb tune for intake and GFB?
Would that do it?
i mean safer i guess?
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post #11 of 22 Old 05-19-2012, 08:39 PM Thread Starter
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OKi..
I took the intake out and OMG, car run soooo much better
much better response and pulls.
Yes, i know ppl are saying don't do it with out the tune
but like most ppl we just do and take it off lol
I guess we hope we wont have to do the tune and get luckey
but not in my case
TYVM guys
I did leave the GFB BpV/BoV on

I will call the dealer and see if they would void the warranty
if I tune it and if it will, then I guess I'll wait
3yr or 36k miles
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post #12 of 22 Old 05-20-2012, 04:37 PM
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what did the dealer say?
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post #13 of 22 Old 05-21-2012, 04:27 PM
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i never understood why people say that. whats it matter if it blows at 3k or 36k? you still have to pay for it if you blew it up. why waste your time for 3 years and 36k to drive a pig around?

and as for saying "i guess we hope we wont have to do the tune and get lucky" is crazy talk! if you arent logging your car you have NO idea if you do or dont need a tune for something. so hoping and praying is only going to damage the motor if you havent done so already.

ive said this a million times so one more shouldnt hurt. the OEM tune is garbage and knocks like crazy. anything over 1.8 load especially in the upper RPMs is death to a motor territory. now im not talking about the motor blowing up and killing you but its enough to crack a piston ringland. once a ringland has cracked you lose all power to that cylinder. sometimes 1 down cylinder cant be felt by your normal everyday Joe. most time the ECU doesnt even know there is a problem. you can crack a ringland for exactly what you have done or you can "micro crack' it. if you pulled the piston and magna fluxed it you'll see the micro crack. however no ones gonna do this. once you start tuning and adding more parts and power the crack will grow and blow the motor. this is why you guys gotta read before you start "hoping" everything will be ok. get off the OEM tune and get a stage 1 tune from someone; sooner the better.

Scott-2011 WRX 335HP 394TQ 93 VF52!
http://www.wrxtuners.com/forums/f121/2011-wrx-build-31226/
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post #14 of 22 Old 05-21-2012, 08:19 PM Thread Starter
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damn.... I got schooled :P

Thanx for the explanation

As for the dealer, I didnt get a chance to call today but I bet they'll be like hellz no
but you never know. The dealer my do the tuning.
I'll keep as posted

Why would the sell a car with such a bad tune then? I don't get it. Why they setting them self up for
repairs?
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post #15 of 22 Old 05-21-2012, 09:39 PM
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Good question! I have no idea why the hell they would put such a crap tune on a great platform like the wrx. But alas...its there so all we can do is fix it. Good news is I think with a stage 1 tune you will be happier with the overall feel of the car. You will feel a lot smoother acceleration. And a slight bump in power. I vote start at stage one and let the mod bug dig in

Kevin.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.
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