can u tell me what the problem with my toyota tacoma is? on 2000 Toyota Tacoma

it has several codes.300,302,303. it ldels rough and lacks power. I have repalced all injectors,all coil packs,all sparkplugs,air filter.its a 2000, 2.4l standard trany.I cleaned the mass air flow senser last night. althow each time i replaced a componit it ran better. it still has the codes pop up after 20 to fifty miles of driving. what do you think?

Asked by for the 2000 Toyota Tacoma
Those codes are cylinder misfire codes. I suggest you do a compression test on all 4 cylinders. there should be no more than 20% difference between all 4 cylinders.
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I had same code(s) went thru all you did it turned out to be a bad fuel filter. hope it helps
I changed the fuel filter before i changed the difference but thanks for the responce