Welcome! There are a TON of CHEAP mods to do to that 4 banger. The 3400 is another story....$900 ceramic coated headers vs. $200 ceramic coated header (for your engine) lol. I have over 8k into mine and will NEVER see that....with my fully new suspension, 3500 engine with 35k on it and a CLEAN car it's only worth prob like 3k
If you love the car.....start modding!
Also...you said the cruise doesn't work....do you have any lights on in the gauges? If your trac off/abs/service vehicle lights come on it's a bad speed sensor in your wheel hub. Get a scanner and find out which one...then replace hub assembly. Cruise control will work again. If not...idk what it is....could be a bad cruise module?
Windshield wipers.....there is a thread on it with no answers....try replacing the wiper motor and check if the wipers are bolted down tight enough (prob are but worth checking).