hey guys, I drive a 2006 wrx with 30k miles and recently swapped a vf39 & sti tmic and am running the cobb vf39 map.
i also recently started throwing a Cylinder 1 Misfire code. At first i thought i just got a bad batch of the 91 cali **** gas, but it started coming on a little after every fill up.
im not sure what steps to take first, should i change out the plugs with oem ones? or go ahead and switch to one step colder plugs? also, what is the gap i should be using? Please give me your thoughts or suggestions. thanks in advanced.

mods are
vf39
sti tmic
cobb ap, vf39 map
bosal divorced dp
hks carbon ti
k&n drop in filter

 

any other mods??? are they oem plugs??? flywheel??? pulley???

 

my car is doing the same thing with an 02 wrx but i hav a pully.. i have been thinking about taking it off. does a pully even make any different in power??

 

i added the mods up top. yeah, they are oem plugs, never touched them. stock flywheel and no aftermarket pulleys.

 

anyone??

 

Take it to a local tuner, GST would probably be closest.

 

From my research on nasioc, ngk iridium plugs are already gapped, so if you do switch them yourself, I wouldnt recommend messing with them. There is a spark plug faq on nasioc if you want to check it out.

I just rechecked your mods...doesnt that map require STi pink injectors????

 

Thanks for the info man, ill check out the faq.

as for the injectors, the cobb website said that i dont need injectors due to the 06 wrx's having bigger injectors.

 

ahhhhh yes, I overlooked that. I still vote to take it to a tuner and/or get a custom tune. Cobbs maps work, but in the end a map specially made for your car is the most efficient. Good luck!

 

thanks. i already have an appointment this friday at GST, but im hoping to get that problem fixed before the tune so i dont have any problems. do you think theyll be able to diagnose the problem?

 

This is just one part of the modding game - risk.

Hopefully its something maintenance related thats easy to fix, with these types of problems you just have to trouble shoot one step at a time, spark plugs, fuel pump, fuel filter, tune.....has the k&n drop in filter been cleaned recently? Ive heard that the k&n filters do indeed flow more....but get dirty VERY quickly. Hopefully its something simple like that.

 

Ive never had a pulley on my old wrx or my current STi but Ive read that it helps the engine rev a tad faster....not increase horsepower.

 

CHANGE your plugs 1st. def do a step colder. cheap maint . i have barely no engine mods an i changed mine at 30k. iridium 1step colder. MMmmm

 

do you happen to have the part number for ngk iridiums that are one step colder? and are they already gapped to what i need? or will i need to gap them? thanks

 

BKR7EIX11

http://www.subaruparts.com/catalog/?section=937

at the bottom.

I think.