Deer Killer Posted March 10, 2008 Share Posted March 10, 2008 Then you don't have it that bad. It's nearly whiplash causing at it's worst. Even my mom who couldn't possibly have less of an opinion on how a car runs said ":eek: That's not normal???? :eek:" at about 1000 miles. Link to comment Share on other sites More sharing options...
Guest Posted March 10, 2008 Share Posted March 10, 2008 +1 mine is stutter free, but I rode in out that was really bad it is real problem, but perhaps not as widespread as some think Link to comment Share on other sites More sharing options...
RudeMood Posted March 10, 2008 Share Posted March 10, 2008 Stutter free 2008 Spec B here. woot. Link to comment Share on other sites More sharing options...
Raising Arizona Posted April 21, 2008 Share Posted April 21, 2008 I'm thinking the hesitation has something to do with that drive-by-wire under accelerator pedal.. The F'n name escapes me right now... The Mtn Dew hsn't kicked in yet. Link to comment Share on other sites More sharing options...
Throttlejockey Posted April 21, 2008 Share Posted April 21, 2008 Stutter free 2008 Spec B here. woot. None here either! Link to comment Share on other sites More sharing options...
Woby Posted April 21, 2008 Share Posted April 21, 2008 Rudemood and Throttlejockey count yourself lucky and cross your fingers. I have 10,000kms on my '08 Spec B and had about 9,500 kms with no issues, now I experience it in both S and S# mode just north of 4,000 rpms. I just about cried the first time it happened! Link to comment Share on other sites More sharing options...
Denver133 Posted April 21, 2008 Share Posted April 21, 2008 None here either! Mine is the exact opposite. I have damn near whiplash as well when I get it. Its horrible. I try and pass someone and then the car dips, then picks back up again. I have been holding on getting my AP since this has turned me off severly with Subaru. Link to comment Share on other sites More sharing options...
JonnyD3487 Posted April 21, 2008 Share Posted April 21, 2008 Mine stuttered a little in 2nd gear mostly. My friend just gave me a flash very similar to a cobb map. I no stutter no more. Link to comment Share on other sites More sharing options...
mcbaker55 Posted April 21, 2008 Share Posted April 21, 2008 Mine is the exact opposite. I have damn near whiplash as well when I get it. Its horrible. I try and pass someone and then the car dips, then picks back up again. I have been holding on getting my AP since this has turned me off severly with Subaru. x2 - it's embarassing. I get it in 2nd, 3rd, 4th, and 5th and i too have had passengers ask me what's wrong with my car. If you have it bad, it is a very big deal - anyone who says otherwise hasn't experienced it. Link to comment Share on other sites More sharing options...
gugarci Posted April 22, 2008 Share Posted April 22, 2008 This thread really has worried again. I'm looking for an 09 Legacy. Link to comment Share on other sites More sharing options...
john_knoxville Posted April 22, 2008 Share Posted April 22, 2008 I'm thinking the hesitation has something to do with that drive-by-wire under accelerator pedal.. why do you think that? does the 3.0 h6 have stutter? does it use the same drive-by-wire system? does the 3.6 h6 have stutter? does it use the same drive-by-wire system? does the 2.5i have stutter? does it use the same drive-by-wire system? crosslink here Link to comment Share on other sites More sharing options...
Throttlejockey Posted April 22, 2008 Share Posted April 22, 2008 No stutter on the 3.0R. Link to comment Share on other sites More sharing options...
gugarci Posted April 22, 2008 Share Posted April 22, 2008 No manual either. I drove both an auto LGT and a 3.0. I compared passing power from 60mph with a downshift to 4th on both cars and the LGT pulled much better. But I'm sticking with a manual since I can't afford a G35Xs. Link to comment Share on other sites More sharing options...
Raising Arizona Posted April 23, 2008 Share Posted April 23, 2008 why do you think that? does the 3.0 h6 have stutter? does it use the same drive-by-wire system? does the 3.6 h6 have stutter? does it use the same drive-by-wire system? does the 2.5i have stutter? does it use the same drive-by-wire system? crosslink here At this point I'm just trying to figure out what others have tried so I can narrow this down.. I'm not convinced its the drive by wire. I'm thinking crappy ground could cause some of these symptoms. What to you think? Link to comment Share on other sites More sharing options...
NSFW Posted April 23, 2008 Share Posted April 23, 2008 From some of the descriptions, I'm wondering if it's a faulty sensor (or sensor wiring harness) that's causing the ECU to go into a self-defense mode. For example, if you overboost, it'll cut fuel until boost goes down. Datalogging would be able to confirm or disprove that theory. Link to comment Share on other sites More sharing options...
Raising Arizona Posted April 23, 2008 Share Posted April 23, 2008 From some of the descriptions, I'm wondering if it's a faulty sensor (or sensor wiring harness) that's causing the ECU to go into a self-defense mode. For example, if you overboost, it'll cut fuel until boost goes down. Datalogging would be able to confirm or disprove that theory. Its a possible solution, but that should be easily fixable by the oem. I'm willing to bet my car they've looked into that already. I'd like to see what the A/F ratio looks like when this happens. Maybe running to rich at that load/boost point and it soak'n the plugs? Then takes that amount of time to clean up. It acts that way. I doubt its to lean though. It could be so many things. Hmmmmm. Link to comment Share on other sites More sharing options...
02BlkRex Posted April 23, 2008 Share Posted April 23, 2008 From some of the descriptions, I'm wondering if it's a faulty sensor (or sensor wiring harness) that's causing the ECU to go into a self-defense mode. For example, if you overboost, it'll cut fuel until boost goes down. Datalogging would be able to confirm or disprove that theory. I'm not really sure of all the lingo but I remember someone saying it was the transition of Closed Loop Boost Control to Open Loop Boost Control or vice versa. That's why it only happens on turboed cars. Link to comment Share on other sites More sharing options...
john_knoxville Posted April 24, 2008 Share Posted April 24, 2008 I'm not really sure of all the lingo but I remember someone saying it was the transition of Closed Loop Boost Control to Open Loop Boost Control or vice versa. That's why it only happens on turboed cars. aha, so its not unique to subie's only, but you're saying it only affects turbocharged vehicles. and arizona, you posted in the other thread that you're aware of hesitation/stutter affecting your buddy's wrx, so it affects other turbo models within subaru (wrx's are assembled in japan, are they not?). BlkRex, can you remember any lingo about why the transition may be affected by temperature/humidity changes? does this come back to what arizona said about voltage? Link to comment Share on other sites More sharing options...
Raising Arizona Posted April 24, 2008 Share Posted April 24, 2008 aha, so its not unique to subie's only, but you're saying it only affects turbocharged vehicles. and arizona, you posted in the other thread that you're aware of hesitation/stutter affecting your buddy's wrx, so it affects other turbo models within subaru (wrx's are assembled in japan, are they not?). BlkRex, can you remember any lingo about why the transition may be affected by temperature/humidity changes? does this come back to what arizona said about voltage?[/quote I know from my own experience that humidity/temps affect voltage. My MoTec on the Rotary would need to be tweeked when the sun came from behind a cloud, and had to tweak things everyday as the display would show varying voltage numbers and the car would run extremely different. After reading the manual a bit that "SI-drive" captured my attention. Its like a dual stage boost control only 3 settings, correct? This could be the flaw or the issue. I Couldn't get ahold of my friend to ask , but does this hesitation happen in the "intelliegent" boost setting, how bout "sport"? I know it happend in the "sport sharp". Just trying to pin point things and narrow it down. I bought an 08 Limited N/A car and haven't experienced anything.. which leads me to believe its boost-A/F related. Its sad that we as consumers have to spend time trying to figure someone else's creation. My buddy told me about this issue when he first bought the car and thought, "ya, its just a intake leak or something", only find out its much more than that... I don't know! Link to comment Share on other sites More sharing options...
gugarci Posted April 24, 2008 Share Posted April 24, 2008 Are there any other Subaru turbos stuttering??? What about the 087 STI's, also my brother just bought a used 07 STI any of them stutter??? Link to comment Share on other sites More sharing options...
Guest Posted April 24, 2008 Share Posted April 24, 2008 07 STIs maybe don't stutter, but instead have engine-killing ECU calibration stock. Check nasioc. There are MANY MANY dead 07 STIs, lightly modded and stock alike. Link to comment Share on other sites More sharing options...
02BlkRex Posted April 24, 2008 Share Posted April 24, 2008 BlkRex, can you remember any lingo about why the transition may be affected by temperature/humidity changes? does this come back to what arizona said about voltage? Anything that effects boost, timing, fuel, etc. will effect it. After reading the manual a bit that "SI-drive" captured my attention. Its like a dual stage boost control only 3 settings, correct? This could be the flaw or the issue. I Couldn't get ahold of my friend to ask , but does this hesitation happen in the "intelliegent" boost setting, how bout "sport"? I know it happend in the "sport sharp". Just trying to pin point things and narrow it down. SI-Drive ONLY controls throttle position and as a side effect, controls boost that way. It's not a boost controller in the traditional sense. Link to comment Share on other sites More sharing options...
Raising Arizona Posted April 24, 2008 Share Posted April 24, 2008 Anything that effects boost, timing, fuel, etc. will effect it. SI-Drive ONLY controls throttle position and as a side effect, controls boost that way. It's not a boost controller in the traditional sense. Okay, and that makes more sense to me. The oem info isn't very clear and just states the 3 different selections not talking about how it works. I'm learning as I go here. thanks ^^ Link to comment Share on other sites More sharing options...
strykr Posted March 9, 2009 Share Posted March 9, 2009 I know this thread has been dead for a while, but Im really starting to have this problem pretty seriously. 06 2.5i MT. If I ever have to pull out of somewhere quick, my car pretty much shuts down. I can have the pedal to the floor and it barely wants to move. I might as well be starting in 4th from a stop. Any fix for this yet? Link to comment Share on other sites More sharing options...
miles Posted March 9, 2009 Share Posted March 9, 2009 I've had 2 2005 Legacy GT's and the only stutter I ever noticed was right at it's primary spool-up range around 2800 RPM's if you were feathering the throttle. It only hesitates a little at that particular RPM. +1 I just realized that in the winter I have no stutter (temperature below 32F). I've driven my car through 5 winters. Link to comment Share on other sites More sharing options...
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