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if it's a ticking coming from near the TB (throttle body), it is in fact the TB readjusting. A TB should ONLY do this if the battery is disconnected or the TB is unplugged. The fact that it happens repeatedly is a sign that something is amiss. Can't say if it's critical, but there is something definitely not at 100%

Now the other noise, like an impact drill, if it's coming from the CVT area, is definitely the starter. Could be caused by a weak battery, a bad connection (corrosion), or a weak starter.

Another noise you may hear periodically is the fuel pump priming, after turning the key, before engine cranks. This sounds like a small electric motor buzzing or whirring for a few seconds. totally normal.
 

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you can usually coax a weak starter to keep working for a time. longer crank times or multiple cycles may be needed, along with a few hammer hits to the solenoid may be needed.

you should also get your battery checked, load tested, and clean the terminals to promote the best connection possible between the alternator, starter and battery.
 
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