Odd stock acceleration?
Nov 22, 2010, 10:10 PM
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Odd stock acceleration?
Hello, I have had my evo x for about two weeks now and I love it, there is just over 35k on it and it was well maintaned by the previous owner. It is stock and has never been modified and I have recenlty noticed that under full throttle acceleration its almost as if after it spools the boost drops in and out on a minor level, like someone took away ~25 horsepower for 500 rpm then gave it back for 500 rpm or so and then took it away again? its not rough or shakey at all just feels like once its pulling the power falls off and them comes back and then falls off between 4-7k
Any ideas?
Thanks guys and gals
Any ideas?
Thanks guys and gals
Nov 22, 2010, 10:27 PM
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But I was thinking it might be the stock tune,
** I noticed there is a TSB sticker on the underside of the hood and I took it into Mitsubish to find out what it was, if it was a recall item or something and it turns out it was a reflash from the factory so that might have something to do with it???
TSB SC-009-002 < --- JUST found this 09-002 in the list of TSBs on the general x forum
AWC ECU reprogramingPN 8631A040
Already order an Accessport
cant wait!!
Last edited by HELPr; Nov 22, 2010 at 10:34 PM. Reason: updated text
Nov 23, 2010, 06:22 AM
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Mine does the same thing, I bought the ETS Intake/IC hoping that would rectify the problem on it's own.. no. There is no substitute for a good tune, so I have a tactrix 2.0 on its way to me now. After payday Ill order the boost gauge and wideband, then its play time.
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Nov 23, 2010, 10:48 AM
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Awesome, that was the feedback I was hoping to get, all hail Mitsubishis poor tune....
Makes you wonder why its tuned so poorly from the factory? Probably has to do with Americas strict laws governing foriegn vehicle performance...
as far as i know the FQ 330 / 360 for the most part benifit primarily from better tune where as the 400 has more upgraded components.
Makes you wonder why its tuned so poorly from the factory? Probably has to do with Americas strict laws governing foriegn vehicle performance...
as far as i know the FQ 330 / 360 for the most part benifit primarily from better tune where as the 400 has more upgraded components.
Nov 23, 2010, 11:08 AM
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Awesome, that was the feedback I was hoping to get, all hail Mitsubishis poor tune....
Makes you wonder why its tuned so poorly from the factory? Probably has to do with Americas strict laws governing foriegn vehicle performance...
as far as i know the FQ 330 / 360 for the most part benifit primarily from better tune where as the 400 has more upgraded components.
Makes you wonder why its tuned so poorly from the factory? Probably has to do with Americas strict laws governing foriegn vehicle performance...
as far as i know the FQ 330 / 360 for the most part benifit primarily from better tune where as the 400 has more upgraded components.
Im fairly certain it has everything to do with emissions and performance regulations. or they were just scared to tune the car lean, and went with the safe... super fat.
Nov 23, 2010, 11:36 AM
#11
is it still on the original clutch. kinda sounds like your clutch is going out.
I spoke to a local tuner over the weekend. He says the reason the clutch going out doesn't feel like a typical slipping clutch on our cars is cause of something called torque request or something like that... basically what happens is the ecu monitors the wheel speed and the flywheel speed. if they don't correspond correctly the ecu will pull power to try and save your clutch. so when you drive it, it feels like a bad tune...
not saying this is exaclty whats happening in your case, but its prolly worth looking into
I spoke to a local tuner over the weekend. He says the reason the clutch going out doesn't feel like a typical slipping clutch on our cars is cause of something called torque request or something like that... basically what happens is the ecu monitors the wheel speed and the flywheel speed. if they don't correspond correctly the ecu will pull power to try and save your clutch. so when you drive it, it feels like a bad tune...
not saying this is exaclty whats happening in your case, but its prolly worth looking into
Nov 23, 2010, 11:42 AM
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is it still on the original clutch. kinda sounds like your clutch is going out.
I spoke to a local tuner over the weekend. He says the reason the clutch going out doesn't feel like a typical slipping clutch on our cars is cause of something called torque request or something like that... basically what happens is the ecu monitors the wheel speed and the flywheel speed. if they don't correspond correctly the ecu will pull power to try and save your clutch. so when you drive it, it feels like a bad tune...
not saying this is exaclty whats happening in your case, but its prolly worth looking into
I spoke to a local tuner over the weekend. He says the reason the clutch going out doesn't feel like a typical slipping clutch on our cars is cause of something called torque request or something like that... basically what happens is the ecu monitors the wheel speed and the flywheel speed. if they don't correspond correctly the ecu will pull power to try and save your clutch. so when you drive it, it feels like a bad tune...
not saying this is exaclty whats happening in your case, but its prolly worth looking into
when I get the accessport in this should be evident if that is the case, which means ... new clutch
Nov 30, 2010, 09:38 AM
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Go to the dealer there is a recall and they will reflash your ECU. Had the same thing above 5k the power dropped. This was an issue with the factory tune. After the dealer reflashed it's like a different car.
Nov 30, 2010, 09:53 AM
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I spoke to a local tuner over the weekend. He says the reason the clutch going out doesn't feel like a typical slipping clutch on our cars is cause of something called torque request or something like that... basically what happens is the ecu monitors the wheel speed and the flywheel speed. if they don't correspond correctly the ecu will pull power to try and save your clutch. so when you drive it, it feels like a bad tune...
not saying this is exaclty whats happening in your case, but its prolly worth looking into
not saying this is exaclty whats happening in your case, but its prolly worth looking into
Feb 13, 2011, 11:19 AM
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i've had my '09 GSR (entirely stock) for a month now and last night i managed to do 0-60 (actually even better, 0-100km/h) in 4.7 seconds! didn't use any sophisticated equipment and didn't have a passenger. i just set the countdown alarm on my mobile phone and as soon as i let go of the clutch i simultaneously started the timer and dropped the mobile on the passenger seat. i had hit 100km/h exactly at the 4.7sec mark, which was my goal. i'll try to do 4.6 next time