>>5138
Try this on the 24DE:
Clean throttle plate.
Clean the MAF sensor. Don't worry about the IAT. Apparently all it does in the KA's system is diagnostics.
Clean IACV/AAC/fast idle cam. You may need a gasket depending on engine format.
Clean EGR ports/valve. Gaskets will be required for the valve. Ports will probably have hex plugs, which should be re-sealed with high-temp threadlocker. Also be careful not to get too much carbon into the runners.
PAIR valve (if equipped). See about deleting it if equipped and if there isn't some gay law in your region that requires you to have it.
Replace vacuum hoses. Most are 1/4" OD.
Run fuel injector cleaner. Gumout and Techron are pretty great. It works far better than you'd think.
Replace fuel filter and air filter. Probably replace as much of the fuel system as you can.
Remove/block silencer from intake breather tube. It won't make it any faster, but it'll prevent that sexy KA boat drone from being covered up. Don't bother with a CAI, though.
Clean the ground leads. These are the negative wires all over the engine bay with loops on the end held in with 6x1.00 bolts. Clean the loops, chase the threads and replace the bolts.
Replace the upstream oxygen sensor. This part might be a bitch. It tends to weld itself to the bung in the manifold.
Most importantly, avoid Fram oil filters. Buy Bosch.
Pennzoil Synchromesh GL-3 in the transmission, if it's manual. Most fluids will eat the transmission very quickly, so make sure it's the right kind. I've heard Redline MT90 is also good but haven't tried it yet.
Doing all that should help immensely. You'll have some adjusting to do to get used to the engine's acceleration curve in good health.
That turbo 24E does sound damn awesome, but you can never predict how long a KA-T/R will last. Assuming a timing chain guide doesn't break off get sucked up into the oil pump, a stock KA will last many hundreds of thousands of miles.