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?

by in El Cajon, CA on August 17, 2011
2 answers 1 comment
ANSWER by on August 17, 2011
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.
ANSWER by on October 07, 2011
I had same code(s) went thru all you did it turned out to be a bad fuel filter. hope it helps
COMMENT by on October 28, 2011
I changed the fuel filter before i changed the injectors.no difference but thanks for the responce