Q: Toyota Corolla misfire on number two.

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i dignose with obdtwo and it complained coil a b c and d, when i clered fult code and re dignose no tdc. bud the engine is misfiring, can it be clogged valve. pls assist me i am an automobile engineer. thanks

My car has 23836 miles.
My car has an automatic transmission.

In many cases, misfires can be diagnosed by swapping components from the missing cylinder with the components of a functioning cylinder. Then you check the scanner to see if the misfire moves. It can be time consuming, but most auto repairs are. If your scanner is indicating a problem in the TDC sensor, that could also be contributing to your problem. Problems with the valves can be diagnosed by a compression test. To get the actual information, you can contact Your Mechanic to have a technician come to your home or office to check out your misfire and tell you just what’s going on with your car.

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