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IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

IS350 CEL/MIL/VSC problem

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Old Feb 22, 2026 | 01:23 PM
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Justincontre's Avatar
Justincontre
7th Gear
 
Joined: Mar 2024
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Hello,

i hope someone could help me with this issue im having. Im getting a misfire in cyl 1 its usually when im downshifting at a light or a turn.

other than that the car runs great and idles great.

my fuel trims are the following at idle: Short Term Fuel Trim - Bank 1

0.0 %

Long Term Fuel Trim - Bank 1

9.4 %

Short Term Fuel Trim - Bank 2

0.0 %

Long Term Fuel Trim - Bank 2

19.5 %

when driving the LTFT Bank 2 drops to around 7%

but when idling its very high. First things i did was check for vacuum leaks everywhere but found none (using smoke machine)

new spark plugs and switched coil pack from 1 to 3

but still is the same code P0301

i have checked the wiring connector for the injectors and ohmed out the injectors to 14.3 and 14.6 on 1 and 3 (still havent checked others)

i dont know what to move forward with. I was thinking maybe a clogged injector in cyl 1 but unsure



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