Does a 2003 Acura RSX have a timing belt or chain?

SOURCE: 2003 acura rsx cough sputter

Regarding the heating issue, sounds like your thermostat is stuck open so the coolant isn't heating up. (May need replacement) Does your engine temp guage show it running colder than normal?

SOURCE: acura rsx trunk latch stuck & won't open

could be the spring release in the lever on the trunk itself. If you can hear the acuator locking/unlocking(that is all it's ment to do) then the spring release is the problem. you need to unbolt the latch from inside the trunk and once the trunk is open you can trace from there. I had the same problem due to a minor fender bender and I just fixed mine last week.

SOURCE: Check Engine and noisy belts in the hood

try just changing your serpentine belt which is the source or your squeaking you hear when the rpm start to jump around.

SOURCE: How to remove the headlight assembly on an Acura

There will be screws in front and one or two pointing down on assembly.
You can go to autozone.com and register for full free online repair manual for your acura. It has diagrams and step by step directions on everything. Plus much much more

SOURCE: where is the b1 s1 o2 sensor located on my 2003

bank 1 sensor 1 il locates right infront of the catalytic converter . bank 1 sensor 2 is located in the catalytic converter