staying_chuki

Well definitely check the maf man, they can cause some of the weirdest problems. Spacers and wheels wise, i personally prefer like a 17x9 or 17x9.5 with a 1/2 inch spacer, thats always been my favorite setup. Nobody can really tell you what route to go with wheels though, its all personal preference.

You dont need the cat, i mean i assume you are driving a n/a 4 cylinder lol they dont really need much of anything to keep scootin. Backpressure doesnt really matter.

For the vacuum leaks again, id say if you haven't already you need to very thoroughly check the pcv hoses for leaks, they arent easy to find sometimes but they can cause some real bullshit.

I really wouldn't do any upgrades yet if i was you, sounds like theres a few more important issues that should be worked out first. And remember if you're trying to get it to run good buy oem parts, you can always upgrade later and resell shit. Most upgrades require accompanying mods to really do a lot. Thick wheels and tires wont do anything when your makin 150 hp you feel

Also if you do check timing be careful and go slow, i did a rebuild on my ka recently and had to redo timing twice cuz i suck. And im not a newb either ive rebuilt a lot of motors, the ka is just a biatch

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