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| MazdaSpeed 3/6 - Turbo Induction MazdaSpeed 3/6 - Turbo Induction - Have a turbo, intercooler, downpipe question? Anything turbo related belongs here! |
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01-31-2015, 08:13 AM
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(Thread Starter) |   Not Ranked : 0 score  Help just wondering if anyone can help me figure out why my 2011 MS3 won't boost over 7psi. everything was fine yesterday and I was getting the usual 15+ psi but when I went to drive the wife to work this morn it wouldn't boost over 7psi. drove around for and hour to make sure it was nice and warm as it is currently -20 C and there was no change to the boost pressure. any ideas what my problem is? |
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01-31-2015, 08:27 AM
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| Not Ranked : 0 score Any tuning device that can log? Or maybe Bluetooth that you can run torque on? Regardless it sounds like you have a massive leak. What's your mod list? Any recent work done? Check your boost tubes from turbo to intercooler, intercooler to throttle body. Check that the vacuum line is still on the bypass valve. Can you hear any air rushing?
__________________ Wiseco OTS pistons, Eagle Rods, ARP mainstuds, JBR BSD w/ baffle,GT2871R, 51R battery, JBR V1 3.5 aluminum widepath, CP-e Catted DP, custom 3in cat-back, Treadstone TR8L core w/ COBB piping, Damond OCC, HKS SSQV3 (full VTA), autotech HPFP internals, Self tune 33% E85, Grimmspeed EBCS (3port), JBR TM & PM, TRZ Rmm, COBB short shifter, COBB Front/Rear swaybars, Koni STR.T struts, AXIS Circuits 18x8.5 45offset **Old Motor** Best 1/4 -13.19 Stock Turbo/ street tires Best trap speed - 112mph **New Motor** Best 1/4 - 13.35 Stock turbo/ street tires Best trap speed - 112.5  |
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01-31-2015, 08:30 AM
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(Thread Starter) | Not Ranked : 0 score car is bone stock 24000 km on it and I don't hear any air rushing at all |
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01-31-2015, 08:38 AM
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| Not Ranked : 0 score I assume then, you are basing boost levels off of the stock gauge?
__________________ Wiseco OTS pistons, Eagle Rods, ARP mainstuds, JBR BSD w/ baffle,GT2871R, 51R battery, JBR V1 3.5 aluminum widepath, CP-e Catted DP, custom 3in cat-back, Treadstone TR8L core w/ COBB piping, Damond OCC, HKS SSQV3 (full VTA), autotech HPFP internals, Self tune 33% E85, Grimmspeed EBCS (3port), JBR TM & PM, TRZ Rmm, COBB short shifter, COBB Front/Rear swaybars, Koni STR.T struts, AXIS Circuits 18x8.5 45offset **Old Motor** Best 1/4 -13.19 Stock Turbo/ street tires Best trap speed - 112mph **New Motor** Best 1/4 - 13.35 Stock turbo/ street tires Best trap speed - 112.5 |
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01-31-2015, 08:57 AM
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| Not Ranked : 0 score Boost leak.
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01-31-2015, 08:58 AM
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(Thread Starter) | Not Ranked : 0 score yea stock gauge |
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01-31-2015, 09:11 AM
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| Not Ranked : 0 score Time to start checking clamps. Isn't the stock tip prone to falling off? Also your stock "boost gauge" is more of a throttle position gauge. Otherwise I'm on "15 psi" all day...
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01-31-2015, 10:30 AM
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01-31-2015, 12:29 PM
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I'm no scientist but if it's past the maf sensor it wouldn't read it unless it was bad enough to effect your a\f ratio to throw a lean or rich at idle code.
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01-31-2015, 09:17 AM
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(Thread Starter) | Not Ranked : 0 score would I not get a check engine light if there was a leak |
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01-31-2015, 09:58 AM
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| Not Ranked : 0 score No. If you have a small/gross leak that shifts your fuel trims dramatically then it may pop a cel. You most likely have a clamp that isn't tight enough, and while under boost, is letting enough air out to not allow you hit the boost tgt's. (as mentioned above)
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01-31-2015, 02:01 PM
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| Not Ranked : 0 score Sounds like your only on spring pressure.
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01-31-2015, 02:04 PM
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| Not Ranked : 0 score Already mentioned, but it's most likely a leak between your turbo and throttle body
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02-01-2015, 10:17 AM
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| Not Ranked : 0 score Stock tune is load based. Considering you've reported your local temp as -4F, I suspect the ECU is not allowing it to boost any higher or the calculated load is near target and higher boost psi isn't needed.
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02-11-2015, 08:50 AM
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(Thread Starter) | Not Ranked : 0 score brought it into Mazda and it's a faulty waste gate causing the lack of boost |
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02-11-2015, 09:30 AM
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| Not Ranked : 0 score At least it was not causing overboost. |
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02-11-2015, 09:36 AM
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| Not Ranked : 0 score I think you still won't hit full boost on really cold days. That's just part of the stock tune protecting you from overloading. Cold air is more dense so less boost pressure is needed. Think about it if it happens again... Does the car feel any weaker/slower when boost gauge isn't fully pegged to the top?
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02-24-2015, 10:09 AM
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| Not Ranked : 0 score came in too late... I WAS going to say though that you can't handle the boost but it turned out to be your WG.... 
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