Throttle issues

[Wbporkypig]

Ok so I got an 09 yaris with some throttle issue. The car runs fine while idle and revs fine to till I start to move. When I try driving it will go but has trouble accelerating, check engine light flashes when I get up to speed. Any ideas

[WeeYari]

check engine light flashes

Get it checked for stored codes. Without doing so, all you'll be getting is guessing game advice.


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[Wbporkypig]

I did that and it told me cylinder 3 and 4 were misfiring, I've already replaced spark plugs. Car ran a lil smoother but the check engine light still there and acceleration problems still there. I will have my friend come over later to check the light again.

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[WeeYari]

Fault coil packs. Spark plugs are not usually the cause of misfires. Coils are.

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[Wbporkypig]

Ok after I hook computer up to it if it still says misfire I'll replace the coils

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[WeeYari]

You can verify by changing the position of the coils. Swap cylinders 1 and 2 for 3 and 4. If the coils are faulty the codes will follow the bad ones.

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[Wbporkypig]

Ok thanks I'll let ya know wut happens lol

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[Wbporkypig]

Ok so I hooked up to the computer and got p0300, p0301, p0302, p0303, p0304, and p0172. I know what they all mean any easy fix. All cylinders misfire and random misfire and it's running rich

[Bluevitz-rs]

what are your fuel trims reading?

[WeeYari]

Did you clear the codes before swapping the coils around?

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[Wbporkypig]

Idk about fuel trim and I did not swap cause now it's saying misfire on all 4 cylinders

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[Wbporkypig]

Should I still try swapping

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