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Old 01-16-2013, 02:16 PM   #1
eddyj14
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Member#: 343412
Join Date: Jan 2013
Default Problem hitting past 4000 rpms

Hey guys,

I just picked up my first subie.. It's got a bunch of parts I barely know about.. But my problem is. Whenever I try and hit first gear even second and third past 4000 Rpms it like sputters like the turbo idk if it needs a tune or if the computer has a 2 step or maybe has something to do with turbo timer... Idk
Last owner just replaced the turbo with a new sti turbo.
Any ideas?
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Old 01-16-2013, 02:31 PM   #2
fastblueufo
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Member#: 212154
Join Date: May 2009
Chapter/Region: South East
Location: Ed@fastperformancetuning.com
Vehicle:
02 billet crank
pauter rods, pt5857, E85

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Quote:
Originally Posted by eddyj14 View Post
Hey guys,

I just picked up my first subie.. It's got a bunch of parts I barely know about.. But my problem is. Whenever I try and hit first gear even second and third past 4000 Rpms it like sputters like the turbo idk if it needs a tune or if the computer has a 2 step or maybe has something to do with turbo timer... Idk
Last owner just replaced the turbo with a new sti turbo.
Any ideas?
Is the engine managed off the stock ecu or a standalone? Could be a number of things. Is there a check engine light? Could be the tgv's are not open. Meed more info.
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Old 01-16-2013, 03:15 PM   #3
liltoua
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Join Date: Mar 2009
Chapter/Region: South East
Location: Atlanta
Vehicle:
1998 2.5rs
Black

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Two things could be going on, your car is in limb mode. Or you car needs a serious tune if you have lots of upgrades with no tune....ex. upgraded injectors.
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Old 01-16-2013, 03:30 PM   #4
eddyj14
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Yeah there's a check engine light on it...I'm not sure about stock ecu.. It
Might be a stock ecu.. And yeah has new sti turbo pink injectors.. I mean the last owner said it needed a tune to run good it's still drivable but when I try and rev it it sputters so I was just wondering if because of needing a tune or something else... By the way check engine light popped camshaft sensor...knock sensors... And all cylinder misfires... I replaced everything.. It seemed to drive better the spark plugs were bad on it.. But the only thing is reving it hard
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Old 01-16-2013, 04:39 PM   #5
liltoua
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1998 2.5rs
Black

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If you are running a stock ECU and upgraded injectors, your car is going to break up when reving high, your ECU doesn't know what to do with all that fuel being dumped. Sounds like you need a tune. What year/model do you have?
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Old 01-16-2013, 05:42 PM   #6
eddyj14
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It's a 2004 wrx... The block says ej25 and the heads not sure i think they regular wrx heads
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Old 01-16-2013, 05:42 PM   #7
eddyj14
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And yeah I think I might need a major tune .. Thanks man hopefully that's what it is
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Old 01-17-2013, 01:44 PM   #8
liltoua
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Yea you need to get that thing tuned right away. You are not going to be able to do anything until it gets tuned.
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Old 01-17-2013, 03:30 PM   #9
eddyj14
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Yeah I am.. I'm gonna take it to sti Mickey up in CT
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Old 01-17-2013, 03:31 PM   #10
eddyj14
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Yeah I am.. I'm gonna take it to sti Mickey up in CT thanks for your help man.. I appreciate it ^^^
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Old 02-26-2013, 10:56 PM   #11
droned23
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Location: Los Angeles
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2003 wrx
WRB

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Hi, I just upgraded to stage 2 cams and cam springs on an 03 wrx that has an intake intercooler race radiator exhaust and rebuilt heads. My engine does the same sputter. I am scheduled for 750ccinj and fuel pump install with a tune. will the tune fix this sputter?
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Old 03-08-2013, 10:50 PM   #12
06rexwagon
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Vehicle:
2006 WRX Limited Wag
9.9@142

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Quote:
Originally Posted by droned23 View Post
Hi, I just upgraded to stage 2 cams and cam springs on an 03 wrx that has an intake intercooler race radiator exhaust and rebuilt heads. My engine does the same sputter. I am scheduled for 750ccinj and fuel pump install with a tune. will the tune fix this sputter?
Did you set the valve lash on the cams? Sounds like the valves may not be closing fully.
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Old 03-12-2013, 04:12 AM   #13
droned23
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2003 wrx
WRB

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will check but the sputter has stopped for now even under heavier throttle
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Old 05-14-2013, 01:50 AM   #14
20BAJA03
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Check for a vacuum leak... I had a similar problem once and it turned out to be the vacuum hose to the waste gate actuator had become disconnected
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