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| MazdaSpeed 3 - Engine, Transmission & Driveline Discussion of engine, tranny and drivelines. |
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03-07-2013, 11:09 AM
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(Thread Starter) |   Not Ranked : 0 score  Misfire only when 90%to100% throttle I can drive the car fine and can still put the pedal down 89% of the way but when i go wot it misfires.. It misfires/bogs/stutters down 3 times and then i have to let off the gas... there is no check engine light for it because i havent gone wot at all because the car idles/drives fine everywhere as long as i dont... Took it to the shop and they said my injectors were fine... Could it be: -vacuum leak? -bad ground somewhere? |
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03-07-2013, 11:11 AM
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| Not Ranked : 0 score Have you done a compression test for cyl 3 yet... Also, gap that plug down a bit.
__________________ -Pat 2008 True Red MS3 GT3071R 'n Stuff SOLD 1999 Jeep XJ 6.5" Lift | Armor | 33" Tires | Bumpers 1996 Jeep XJ 3.5" Lift | 31" GY Duratracs | Bumpers 1994 Miata 15x8's w/NT05's | KYB AGX | Hardog Roll Bar | 70D Engine Mounts |
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03-07-2013, 11:13 AM
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| Not Ranked : 0 score do you have any logs or anything to monitor the car? my only guess is maybe the car is running super rich and maybe the maf is dirty 
__________________   2010 BM MS3 - Cobb AP||3gal corn||Autotech Internals||ETS TMIC||Forge BPV||Denso Iridium ITV22||TurboXS DP||ARK exhaust||CP-E Nano SRI||PG TIP||JBR RMM||JBR PMM||TRZ TMM||NRG ETD||DDM 55w 5000k HIDs and DDM 35w 3000k HID fogs||JB Heavy Knob||JB SSP||ST Coilovers w/ Eibach rear Camber Kit(made by SPC)||17x9 +28 Drag DR31 (track) RPF1 18x8 +35 (DD)||HKS TT Type 0||Clarion EQ||MB Quarts speakers||Pioneer amps and 10" Competition Sub. 346hp 392lbs of sexyness |
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03-07-2013, 11:18 AM
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So I can only assume that since his injectors are "fine" and he has changed plugs (unless its a more involve ignition issue) that the missfire is compression related.
__________________ -Pat 2008 True Red MS3 GT3071R 'n Stuff SOLD 1999 Jeep XJ 6.5" Lift | Armor | 33" Tires | Bumpers 1996 Jeep XJ 3.5" Lift | 31" GY Duratracs | Bumpers 1994 Miata 15x8's w/NT05's | KYB AGX | Hardog Roll Bar | 70D Engine Mounts | |
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03-07-2013, 11:21 AM
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03-07-2013, 11:22 AM
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| Not Ranked : 0 score oh ok... then possible causes would be is Faulty spark plug Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector Poor compression
__________________ 2010 BM MS3 - Cobb AP||3gal corn||Autotech Internals||ETS TMIC||Forge BPV||Denso Iridium ITV22||TurboXS DP||ARK exhaust||CP-E Nano SRI||PG TIP||JBR RMM||JBR PMM||TRZ TMM||NRG ETD||DDM 55w 5000k HIDs and DDM 35w 3000k HID fogs||JB Heavy Knob||JB SSP||ST Coilovers w/ Eibach rear Camber Kit(made by SPC)||17x9 +28 Drag DR31 (track) RPF1 18x8 +35 (DD)||HKS TT Type 0||Clarion EQ||MB Quarts speakers||Pioneer amps and 10" Competition Sub. 346hp 392lbs of sexyness |
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| The Following User Says Thank You to Oliverms3 For This Useful Post: | rfinkle2 (03-07-2013) |
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03-07-2013, 11:24 AM
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That would definitely be nice if it was something simple.
__________________ -Pat 2008 True Red MS3 GT3071R 'n Stuff SOLD 1999 Jeep XJ 6.5" Lift | Armor | 33" Tires | Bumpers 1996 Jeep XJ 3.5" Lift | 31" GY Duratracs | Bumpers 1994 Miata 15x8's w/NT05's | KYB AGX | Hardog Roll Bar | 70D Engine Mounts | |
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| The Following User Says Thank You to smoogs12 For This Useful Post: | rfinkle2 (03-07-2013) |
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03-25-2013, 01:10 PM
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(Thread Starter) | Not Ranked : 0 score  finally fixed the problem! Went to a shop that my family takes their cars too...anyway the problem was that the new coil pack that we put on cylinder 3 was bad!!! Problem fixed and now i can actually feel the power of the car....thinking its gonna need a new rear motor mount next dereeek likes this. |
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