I have gotten two codes from the car today when the check engine light popped on and i dont' know what to do. one is P0301 and one is P0442

 

p0301 is a misfire

time to change our your coils and plugs

 

heres the list
https://www.rx8club.com/series-i-tech-garage-22/rx-8-technical-info-cel-codes-pcm-pin-list-collision-guide-26291/

p0442 usually means your gas cap is loose, you most likely need a new one

next time please search

 

I've already changed the plugs with 100,000 mile plugs and the coilpacks and the plug wires...

 

^what kinda plugs and coils are those? and how long ago was it done?

 

umm had a shop do it and they said they had to order them from mazda and the packs are BWD performance

 

never heard of BWD performance coils for the rx8, they probably gave you OEM coils/plugs and wires...how long ago did they replace em?

 

plugs and plug wires couple months ago coilpacks about 2 weeks ago

 

Could be a loose or bad plug wire?
Check your leading plug wire at both ends. Then we will take it from there.

Yeah, the one is your gas cap. Click it 5 times when putting it back on. There are very few cases where it had to actually be replaced.

Then we are gonna ask the usual...............Mileage, year?

 

well youre having misfires, and thats from either your coils packs or spark plugs, check em all to see if they are on tight...

and the other code, you can solve that by going to autozone and buyin a new gas cap

 

im the one who put the coilpacks in they did plugs /wires

 

think it might be the front rotor?? i hope not...

 

^the code you pulled is for the front rotor misfire...

 

where did you get your coils from?

 

ya u think it might be rotor goin bad

 

Coils can go bad even if fairly new.
I'd still check to make sure a plug wire didn't come off or is loose.
I would also still ask how many miles on the car? And when you did the others, did you change the wires?

 

we need more info to determine if you have a bad rotor

year? mileage?

where did you get your coils at? cus those BWD's dont sound right

go check your wire connections on both your coils and plugs

 

90k miles changed plug and wires at same time

 

well point is youre having misfires, you need to check your wires that go on the plugs and coils, if they are on tight, you either have some bad coils or bad plugs and or both are bad...this doesnt mean you have a bad rotor/engine

 

if everything is tight it wouldnt hurt to make sure u have the correct plugs in the correct spot

 

well it wouldn't have ran right for over 5 months if that was the case correct?

 

read ur earlier post wrong...thought it said everything just got done a couple weeks ago.....if its been a long time ur fine w /that

 

5 months? you said you just replaced both your coils and plugs

 

^plugs and wires a few mnths ago...coils....recently

 

you got the time right coils few weeks ago plugs and wires few months ago