Today, I replaced the battery for my car with a well-rated 750 cca battery (you can check my post history where I included videos about the issue), but I noticed that while starting it up today it took a tiny bit longer to start. https://streamable.com/dmwvs9. Thoughts?

 

Did you reset the computer? What do those codes say? If not reset it and see if any more codes come back. Seems okay to me. Does your slip light go off?

 

Yes, I reset it but it's still showing P0340 (for the cam issue). It's leading me to now believe that it could be a timing chain issue?

Also, I tried starting it recently and it wouldn't really crank. Possible starter or alternator?

 

Hmmm.....I don't think it's your timing chain. What year is it and how many miles? If you want to test the started, I guess just do the old way is to use a hammer and hit the starter from both sides, then start it to see if the car does better.

For the alternator, check this link out:
Good luck.

 

Hey, it's a 2011 with 100K miles and I already did the alternator test but it seems to work fine. The starting problems seem to come and go variably, and I have a string hunch it's in relation to the CPS issue that I am battling with.