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Old Dec 14, 2012, 02:51 AM
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Miss fire/stutter

Ok so i was in 6th gear (sst) cruising on 100km for a good few k's then i increased speed while on a incline and it started to just missfire/stutter like crazy till i took my foot on the pedal and it came good. tried to do it again but it wont. Its the 2nd random time its happened and i cant work out what it is.
Logging it is nex to impossible as u can predict it and you cant replicate it.
Boost cut? fuel cut?
It has Fresh plugs

It has a Chiptorque tune and a full exhaust from tubo back plus boost pill
Old Dec 14, 2012, 02:56 AM
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It's possible that the tall gear boost control tables aren't limiting boost at low rpms... which is a good safety factor.

Logging 24/7 is quite feasible. You need a microSD card fitted in a Tactrix OpenPort 2.0, with a suitable config text file present on the microSD. It'll then log everything set up, all the time. Very useful for diagnosing stuff like this!

Rich
Old Dec 14, 2012, 08:12 AM
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Coil getting ready to fail?
Old Dec 27, 2012, 03:11 PM
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check the plugs again and test your coils. i had a coil fail on me resulting in buying a new motor
Old Dec 27, 2012, 05:30 PM
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Have you replaced your bpv? Did you have the P12xx MAF codes turned off while tuning?
Old Dec 27, 2012, 10:56 PM
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yeah iam running a hks ssq. It was tuned by chiptorqe so it would be just a file flash
I do get the stutter when i let of the gas and sounds like the wastegate flutter which i think you talking about 03chi-town0Z. Its kinda annoying but if i could get rid of it id be thankfull
Old Dec 28, 2012, 06:40 AM
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There's your problem. Even when installed in recirc configuration, the ssqv is known for that issue. Example around here would be cruising on the interstate, lowering speed to pass through "drive-through" tolling plaza, and then tring to accelerate moderately back with traffic without downshifting. If you get it to happen hard enough and don't let off right away, the car goes into limp mode(if your related codes have not been turned off). Yay!

I wrote a better explanation awhile ago, lemme see if I can find it...
Old Dec 28, 2012, 11:30 PM
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removed the hks sqv and replaced it with the orig bov. Drives better and to be honest i think the hks was leaking.
Watching my boost guage id get a maybe 20psi vacume on wot . Now i stomp it i get about 25psi vacume. Idles better too
Old Dec 31, 2012, 06:06 AM
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Not sure if you had noticed while browsing, but someone else found the threads I was mentioning before I had the chance:

https://www.evolutionm.net/forums/09...t-problem.html

https://www.evolutionm.net/forums/09...ml#post8551277
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