need help now
 

lets start by sayinng donnt mind my typinng my laptop needs a new keyboard annd ive been working on my own cars all my life. dad, bro, stepmom are all ase certified.

anyway, i want good spark for dyno day on sat.

heres what i did today
oil change-not importannt
cleaned mass air flo sensor
took out battery, cleaned terminals-posts and sprayed with protectant i know the computer will take a few drives to reset, this might be the problem?

replaced factory wires with racing beat ones, tripplle checked connections
car idels better at about 900 steady.

replaced plugs wich is anoter problem i put ngk 7 and 9s in but the old plugs i took out which were channged by mazda with previous ownner were 6 and 9s?
whaats that about?

anyway after working on my car today i get a stumble/misfire at 6-7k and 7-8k
is this just the computer relearninng?

my new coils should be in tommorrow annd will channge them

i swapped plugs/wires one at a time

car history
69k
new motor at about 30k
new trans at 50k
oil chaged every 2500

mods
ur ud pullies
k&n intake
ap header back
rb wires
zex not important now
other mods should not mnatter

please set my mind at ease and tell me its just thhe computer relearning

You get a code? P0402 or something like that? Not the computer relearning FT in my experience but a coil issue. Car is in OL at those RPM anyway.

I should also mention that you should remember to disable (completely) the DSC when dynoing.

3 drive cycles is more than enough to relearn ft.

As for cleaning the maf, if you know what you are doing, you should be fine, but if you did screw something up, I dont think it would throw a misfire code.

As for plugs, I dont see the having incorrect heats being part of a misfire issue. But you should use (or at least read up on) the standard heats for NA and one step colder on leading and trailing for turbo.

car is na. just thought it was strange thatr the plugs i took out were wrong.
i have no cell at the moment- batt dis connect
i dont have dsc
my car is just running weird at 6-7k and 7-8k after the work annd i double checked everything.
i hope its just the computer relearnig but i wanted opioins
thhanks

I don't suppose you have a Cobb AP or other data logging tool?
Check the MAF rubber O-ring
Check that the screws are tightening down (not stripped)

double checked mas and o ring. no issue.
i might just being crazy, but dont want to f up my car
please advise

thanks jesse

ps if a mod checks this please deleate my half ass thread, but not this one

Well, the coils will help
And you should get good AFR data from the dyno
Things will be clearer

If you had a leak in the intake you would be able to hear it, or maybe not with the K&N intake. I wonder if its your coils? I didn't see you say you replaced them with the wires and plugs? That should throw a misfire cel though.

no cel yet, but waiting for it-midpipe. coils should be in today but i didnt have this problem before doing the work? no cobb. im still confused about the wrong plugs in my car, mazda put them in right before i got it, i checked with the dealer on this. im gonna put new coils in as soon as i get them and hope that helps but i didnt have this issue before. im really worrier about the plugs i took out, should i be? it ran fine

maybe you should worry about the plugs they gave you in replacment of them? maybe the ones you took out were the correct plugs...

[QUOTE=200.mph; just thought it was strange thatr the plugs i took out were wrong.
[/QUOTE]

Plugs
https://www.rx8club.com/attachment.p...1&d=1287709138

Yeah, that's weird.

Please please please post pics of the leading plugs you removed!

plugs removed were normal looking for 30k,but idk how to post pics. im sure the new plugs are the right ones.

anyway update, i re checked everything and one of my new trailing plugs got a hairline crack in the porclin. after i replaced it with a new one things are back to normal.
a big thanks for all your help, you guys rock
jesse

Awesome news! Good work