Hi i have a 2006 Evo 9 all stock but a perrin intake and a tune with about 42,000 miles on it... The car runs great and idles fine but right at 6.200 sometimes it will break up and backfire no smoke will come out... it will only do it when the car idle's or putt's around at 2-3k rpm around town for more than 30mins

I am going to change spark plugs... I don't think that would fix it but eh... any idea's would be great i know fuel pump and coil packs... but kinda odd

 

I change my plugs every-time I change my oil you should look into that. Couldn't hurt they are cheap to replace.

 

sounds like misfiring, spark plugs might actually fix it!

 

You must own and Evo VIII!

OP, try replacing the plugs with new OEM ones. And yes, VIIIs and IXs use different plugs.

 

LMAO! you change your plugs every 5000 miles?? Now thats a waste of money! I wish IX plugs weren't 65 bux

 

theyre not 65 bucks?

 

just try the plugs first... if that doesn't seem to fix it unless u think something is wrong with the coils a coil on pack wont fix it either, but the car will definitely run smoother.

 

anyone paying 65 bucks for plugs in our cars is getting taken to the cleaners... lol
and every 5k isn't necessary either... as stated above, replace plugs and go from there. be sure to gap them correctly too

 

...

 

On an IX? 17 bux/plug. I know VIII ones are cheaper, which is why im jealous. I see everyone responding like that have 8s

 

Where do you guys buy your plugs? The guys at Autozone tried to charge me 46 dollars per plug for my IX. I said nooo thank you.

 

Got my plugs at Advance Auto think it came up to like $50, did them at the recommended maintenance interval of 60k and the stock ones we're perfectly fine still.
To the OP though, what exact kind of tune we talking about here?

 

ILFR7h < these, I'm not sure but I dont think they have copper plugs for the IX's I had to use iridium in mine aswell.

 

..that's about right for evo 9 plugs

 

I had a similar issue, turned out to be my plugs as well.