CEL codes for 2004 Mazda 6 - Help!

[kjdabney]

I have a 2004 Mazda 6 and really love my car. Its paid for; therefore I want to keep it as long as possible. My car began to jerk randomly sometimes when I increase speed and is sometimes slow to take off. My CEL is on and Ive taken it to Advance Auto and got the following codes: P0301, P0306, P0443 and P0421. I understand that the first two are misfires and have ordered coil packs for those two cylinders. However, the other two codes Im not sure what I should get checked or replace. Any ideas? Please help! Thanks.

 

[FORZDA 1]

I have a 2004 Mazda 6 and really love my car. Its paid for; therefore I want to keep it as long as possible. My car began to jerk randomly sometimes when I increase speed and is sometimes slow to take off. My CEL is on and Ive taken it to Advance Auto and got the following codes: P0301, P0306, P0443 and P0421. I understand that the first two are misfires and have ordered coil packs for those two cylinders. However, the other two codes Im not sure what I should get checked or replace. Any ideas? Please help! Thanks.

Go here for info http://www.motorworksperformance.com/c/P and don't just throw parts at it unless you have lots of money to throw away. The misfires may be spark plugs, but not likely the coils. More likely the fuel injector, even the air filter. Do a bit of searching and you will be happier with the result.


The 443 and 421 are the purge valve....