Hello! I took the MCAT once in 2019 and got a 125 on CARS, then retook January 2021 and got a 131. Of course your time frame is much tighter than mine, but I think the key process is to 1) identify your weaknesses (do you run out of time because you read too slow? or is it an issue with answering the questions incorrectly?), 2) practice a LOT, and 3) always review your practice, both correct and incorrect answers!
If your issue is not finishing quickly enough, begin timing yourself on practice passages such that you finish as much of one passage as possible within 9 minutes -- you usually have 90 minutes for 9 passages (10 mins/passage), but by only giving yourself 9 minutes per passage during practice, you get used to a faster pace that will hopefully allow you to feel like you have more time during the real thing. Find a reading strategy that works for you given your own reading speed. If you tend to read slowly, try skimming the passage first so you have a general idea of it, then going back to the passage and reading specific paragraphs/sections based on what the questions ask for, rather than spending a bunch of time doing an in-depth read of the entire passage and then running out of time on the questions. Also, keep in mind the CARS passages are designed to confuse the f** out of you. If you get to a super convoluted section about some weird thing you don't care about, just skim through it rather than spending forever trying to figure out what the author's saying. You can always go back to it later if a question asks about it (which would very rarely happen).
When it comes to answering the questions themselves, know that the correct answer is always
the choice that cannot be wrong. This is where process of elimination (POE) really comes into use. If there is anything in an answer choice that looks even slightly sketchy, be cautious. For example, the MCAT loves to throw extreme answer choices into the options. Be skeptical of choices with words such as "always" and "never," as well as words with strong emotional connotations (hate, disgust, love, etc.), unless it is very very clear in the passage that the author/character really does feel extremely strongly about the given topic. Phrases/words like "most of the time," "primarily," "generally" tend to be correct more often. Start noticing these patterns when you review your practices! This will help you catch mistakes before they happen next time.
Hope this helps! Everyone's different in terms of the strategies that work for them, so it's really a matter of trying things out until you find what you're comfortable with
