Occassional bouts of surging when applying throttle
07-09-2003, 09:00 AM
#31
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im not sure about your ebc, but when i had the EVC IV, after every mod it would need recalibrating. if this happened after getting an uppipe (a pre turbo flow enhancement) maybe your ebc is having a hard time trying to adjust?
07-09-2003, 12:39 PM
#32
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I've been noticing the same problem with mine, and it's a bone-stock MY03.
Maybe it's the crap 91 octane gas? I've tried most brands -Chevron, 76 etc. but it makes no difference.
07-22-2003, 04:38 PM
#33
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Add me to the pile. 100% stock 04 WRX wagon, 2300 miles on it, same hesitation issues that others have described in this thread. Sometimes the car feels great, sometimes it feels like timing is getting pulled and put back in at random. Sometimes it feels like it's down 30 HP. Sometimes I'll get some serious bucking and hesitation. I've read through this whole thread but nobody seems to have come up with a definitive answer for this. Is grounding the answer maybe? Can anybody else add anything to this?
07-23-2003, 07:55 AM
#34
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There's a difference between the RPM-based hesitations that you guys are speaking of and the surging I am talking about. I have had both.
Like you say, the hesitations feel like lost HP. You can see the tach needle skip.
What I have is not so much a loss of power as it feels like blipping of the thottle at high RPM.
jason
Like you say, the hesitations feel like lost HP. You can see the tach needle skip.
What I have is not so much a loss of power as it feels like blipping of the thottle at high RPM.
jason
10-20-2004, 11:07 AM
#35
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Bump 'cause I have the same problem!
Originally Posted by mmboost
Every so often when I hit the gas, not a full mashing but not being dainty about it either, I will get this fluctuating surge almost like boost is coming on and off real fast or as thought I was going on and off the throttle real fast. Now I havent seen boost going up and down (although I'd love to datalog sometime). So I really can't pinpoint what's going on.
I can put a steady or steadily increading pressure on the throttle and get this behavior.
I've gotten this on and off for the past 8 or so months, through varying mods. Any ideas?
Could it be timing being pulled? I was wondering, but its not like a lasting effect.
jason
Carlsen Subaru reset my ECU twice in the past and it seems to get better for a while after reset, but then it happens again.
I'm wondering about getting colder plugs since I'm almost to the interval where they get changed... and I don't want to spring for a $600 cobb upgrade!
10-20-2004, 12:03 PM
#36
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Lol this thread is da old shiet. Let me give you an update:
I did the grounding mod and it seemed to help a bit. I went to Carlsen and Kevin himself took the Subaru wundergadget to my car. I got a few hesitations in the next day or so, and then they were gone forever... well until the early weeks in learning how to tune my UTEC, heh.
Which month/year did you get your car? Where are you located?
jason
I did the grounding mod and it seemed to help a bit. I went to Carlsen and Kevin himself took the Subaru wundergadget to my car. I got a few hesitations in the next day or so, and then they were gone forever... well until the early weeks in learning how to tune my UTEC, heh.
Which month/year did you get your car? Where are you located?
jason
10-20-2004, 01:13 PM
#37
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I got my car around April of '02, and Kevin has reset the computer twice.
I just noticed it getting worse during the last few weeks, so I was wondering if anyone found a fix.
I think I'll just reset the ECU every so often and live with it... maybe colder plugs will help.
Edit: What subaru wundergadget???????
I just noticed it getting worse during the last few weeks, so I was wondering if anyone found a fix.
I think I'll just reset the ECU every so often and live with it... maybe colder plugs will help.
Originally Posted by mmboost
Lol this thread is da old shiet. Let me give you an update:
I did the grounding mod and it seemed to help a bit. I went to Carlsen and Kevin himself took the Subaru wundergadget to my car. I got a few hesitations in the next day or so, and then they were gone forever... well until the early weeks in learning how to tune my UTEC, heh.
Which month/year did you get your car? Where are you located?
jason
I did the grounding mod and it seemed to help a bit. I went to Carlsen and Kevin himself took the Subaru wundergadget to my car. I got a few hesitations in the next day or so, and then they were gone forever... well until the early weeks in learning how to tune my UTEC, heh.
Which month/year did you get your car? Where are you located?
jason
10-20-2004, 02:11 PM
#38
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I got mine like March 30, '02. Never had the problem after going to see Kevin. Just to make sure, the surges I experienced, you could actually see the tachometer jerking around. I know this doesn't solve the problem directly, but maybe some updrages to enginemanagement might help. Get an ECU reflash relevant to your bolton mods and see how it goes. Heck, you might even be able to strike a deal with a local tuner that if it doesn't help the hesitation they'll "unflash" your ECU and refund you. Who knows?
wundergadget = the mysterious little box that Kevin hooks up to your car and uses to work his ECU magic.
jason
wundergadget = the mysterious little box that Kevin hooks up to your car and uses to work his ECU magic.
jason
10-20-2004, 02:26 PM
#40
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Originally Posted by AWD 20T
LMAO!!! STi Filter! AHAHAHAHA! I'll take a K&N and the extra $40+ in my pocket. Just because it says STi, doesn't mean it's the best guys.
10-20-2004, 02:36 PM
#41
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Originally Posted by AWD 20T
LMAO!!! STi Filter! AHAHAHAHA! I'll take a K&N and the extra $40+ in my pocket. Just because it says STi, doesn't mean it's the best guys.
10-20-2004, 02:37 PM
#42
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Originally Posted by mmboost
I got mine like March 30, '02. Never had the problem after going to see Kevin. Just to make sure, the surges I experienced, you could actually see the tachometer jerking around. I know this doesn't solve the problem directly, but maybe some updrages to enginemanagement might help. Get an ECU reflash relevant to your bolton mods and see how it goes. Heck, you might even be able to strike a deal with a local tuner that if it doesn't help the hesitation they'll "unflash" your ECU and refund you. Who knows?
wundergadget = the mysterious little box that Kevin hooks up to your car and uses to work his ECU magic.
jason
wundergadget = the mysterious little box that Kevin hooks up to your car and uses to work his ECU magic.
jason
Short story long, I replaced the connector with the stock piece, and my car is like night and day. Kevin was right! Albeit making me feel like my effing tint would void my warranty after the rundown on the filter and snorkus. My car is stock w/ Eibachs and P1's and here I sit wondering WTF people with up-pipes and such do at dealer time... Oh well. Anyway, this has lead me to believe that it's bad juju to mess with Suby's boost control mechanism. My car has been perfect w/ no symptoms for months. Finally it is running right, and now it's time to sell it.
-Jacob
10-20-2004, 03:13 PM
#43
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holy ****.. this thread is old, and RESURECTED!
Anyways, I was having the same problem until I relocated my EBC solenoid closer, at the stock location. Everything was fine ... until this week, when, because of the rain, I took the WRX to work instead of my bike... and now I get surging. W T F, over?
Damn it, Jason, come to the Eggettes meet tonight and help me with this!
shadowcat
PS: I have to check the air filter, but other than that, I'm pretty sure everything else is good.
Anyways, I was having the same problem until I relocated my EBC solenoid closer, at the stock location. Everything was fine ... until this week, when, because of the rain, I took the WRX to work instead of my bike... and now I get surging. W T F, over?
Damn it, Jason, come to the Eggettes meet tonight and help me with this!
shadowcat
PS: I have to check the air filter, but other than that, I'm pretty sure everything else is good.
10-20-2004, 03:20 PM
#44
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joe, just suck it up get a utec and a real turbo
jason
p.s. maybe once jon's car is done we'll swing by so he can show off
jason
p.s. maybe once jon's car is done we'll swing by so he can show off
10-20-2004, 04:21 PM
#45
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I have what I think are the same symptoms on occation, but I believe when it happens, it's my fault. Whenever it happens to me, it's becuase i've been a bit harsh with my clutch engagement. If I reduce throttle and let it settle, or just keep on WOT it works through it pretty quickly. I have always assumed it's due to subaru's infamously oversensitive knock sensor.