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Old 08-01-2014, 08:30 PM   #1
2000FourSilverSTI
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Default Idle/Rev Problems

Hi guys, I'm having an issue with my 05 STI.
To start, the car just got a brand long block & many other bolt on type stuff. Everything was working fine on the 5 hour drive home.
The car needed to be aligned so this week I changed the front axles, tightened some manifold bolts that seemed to be a bit loose & also removed the fuel rail because a couple of the O rings seemed to be a bit leaky.
After I started the car I noticed right off the bat the 1500rpm idle, I wasn't thinking too much of it since the battery had been out for a while & everything, so I waited a few minutes, nothing changed.
I then realized when I pressed the throttle pedal down, the car would only, slowly rev up to 2250rpms.
I am throwing a tps code.
Have any of you had this problem?
I'm going to clean the connectors good & everything, but still.
Its almost like its in a tight limp mode.
I'm still fairly new to the Subaru game, any educated input would be great.

Thanks in advance!
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Old 08-02-2014, 04:32 PM   #2
2000FourSilverSTI
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Anybody?

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Old 08-02-2014, 04:35 PM   #3
atomicfire
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Well, if it's throwing a TPS code, did you check your throttle body cable is plugged in tightly? A torn o-ring can cause a vacuum leak which can cause your car to idle high.
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Old 08-02-2014, 09:14 PM   #4
2000FourSilverSTI
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I replugged it in pretty firm, same issue.
I'll upload a video in a bit showing exactly what I'm talking about.
O rings should be fine now, I'm seeing no leaks or anything, but even if there was, it shouldn't be the source of my current problem.

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Old 08-03-2014, 04:53 PM   #5
2000FourSilverSTI
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Here's a short video of my problem.

http://youtu.be/xd9jM-FZiTQ

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Old 08-16-2014, 07:33 PM   #6
2000FourSilverSTI
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Cleaned tps, cleaned throttle body & anything else I could think of, same problem still..
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Old 08-16-2014, 07:36 PM   #7
2000FourSilverSTI
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I had the intake manifold off prior to all of this, is there anything I could have not put back together right or something that would cause this sort of issue?
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Old 08-19-2014, 08:17 PM   #8
2000FourSilverSTI
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Nobody?
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Old 08-19-2014, 08:21 PM   #9
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Something still leaking? Try resetting the ecu
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Old 08-19-2014, 08:24 PM   #10
2000FourSilverSTI
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No leaking, everything is tightened down & cleaned.
Reset ecu, same issue.
I'm just not sure what have caused with since it was fine before I had the intake manifold off.
I've cleaned the tps & everything with still the same issue.
I mean it possibly could be the tps, but I feel like that would just have to be bad luck or crazy timing for it to screw up after the manifold was off.
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Old 08-19-2014, 08:26 PM   #11
LGT257
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Usually when stuff like this happens you need to literally start from scratch. Sucks but take everything off carefully, and put back together more carefully and try again. Most likely you missed something silly or something came loose/broke. Do that and report back, that is my 2 cents!
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Old 08-19-2014, 08:31 PM   #12
2000FourSilverSTI
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That's what I'm going to do & have been wanting to do, just so damn busy all the time.
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Old 08-19-2014, 08:35 PM   #13
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Haha yea, I feel your pain on that good sir
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Old 08-29-2014, 07:26 PM   #14
2000FourSilverSTI
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Default Throttle body not responding

I finally got some time today to mess with the car more. Having the intercooler off & throttle body off the manifold, but everything still plugged in, I pressed the pedal & the the blade didn't move.
So, I'm assuming its either the sensor on the pedal or the sensor on the tb itself.
I'm going to test the voltage on each sensor, any other ideas while I'm doing this?
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Old 08-29-2014, 10:54 PM   #15
BeastianSTI
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Quote:
Originally Posted by 2000FourSilverSTI View Post
I finally got some time today to mess with the car more. Having the intercooler off & throttle body off the manifold, but everything still plugged in, I pressed the pedal & the the blade didn't move.
So, I'm assuming its either the sensor on the pedal or the sensor on the tb itself.
I'm going to test the voltage on each sensor, any other ideas while I'm doing this?
look up the diagnostic procedure for that code in the manual. See what it says to do to identify if the sensor is at fault

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Old 09-07-2014, 10:20 PM   #16
2000FourSilverSTI
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So, after a completely new pedal, new throttle body, same issues..
Is it possible a certain line could be the problem?
Could a vacuum line or anything related actually be the issue?
I just can't see it not letting the car rev up, but who knows..
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Old 09-07-2014, 10:31 PM   #17
novacivic
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Seems like a wiring issue since you replaced all the mechanical parts. Maybe now you should try looking up the diagnostic procedure or take it to a shop
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Old 09-07-2014, 11:05 PM   #18
2000FourSilverSTI
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One thing I haven't tried after doing some more research is the relay under the glovebox.
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Old 09-08-2014, 06:04 PM   #19
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Did you smoke test the intake manifold? If you overtightened the bolts, you could have cracked the manifold cause a massive vacuum leak. Smoke test the intake and manifold.


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