Tuning a 2003 Hyundai Accent Manual?

2003 Hyundai Accent Manual

I had an '04 Accent, manual.

While it didn't have a tach, if I held it in gear, it went. As an example, I couldn't beat a Prius that got a bit of a jump on me in a rolling start, but I gave it a run for it's money. The car would do 110MPH on flat ground, although not recommended with the tires/suspension. One bump and the car would probably be on it's roof.

Anyway, make sure your plugs are good. Those engines are relatively high compression (10:1 as I recall) and not sure if it's a new thing with poorly made plugs (these were NGK's!) or simply the higher compression the modern engines run, but not only do the electrodes seem to wear pretty quickly, but the plugs themselves will show carbon "tracks" on the body of the plug insulator where the metal portion is crimped to it.

With bad plugs, you can expect to get some misfires, and whether you can hear or feel it or not and the PCM takes out timing to keep it at bay, you can lose some power from that.

My car was hit with 140K+ miles on it (still drove it but sold with large dent in the side) and NOTHING had been changed except the plugs. Same wires, same timing belt, etc. It had a slight rattle at idle, which I suspect may have been due to the timing belt starting to stretch, but outside of that, it still ran like a top, and got me ~40MPG freeway every time.

If you don't know the condition of the plugs, pull one, inspect it, and if everything looks ok (no physical damage) check the gap, and if there is plenty of electrode left, gap to spec and re-use. Gap WILL have grown if they have a fair number of miles on them. Don't go with fancy plugs if you have to replace, use exactly what Hyundai recommends.

I have a 2002 accent and it has enough power to get from point A to point B...........these are economy vehicles, not made to be "tuned" or raced............if your vehicle does not have enough power to drive like a normal person would and should, then it's time to get the "race car" you want, then you can get all of the citations you want too

Those aftermarket add-ons are a waste of money. Get a Corvette if you want speed.

Spend your money on fixing/maintaining your car so it wont die on you. That cold air intake will be useless when you have a clogged catalytic converter.