Hi everyone
New here.
I'm working on fixing a friend's car, and I'm almost done, just a few last things to go.
Friend's car is a Holden Barina TM 2012.
Some history:
Friend's car would shake violently when idling.
They mentioned oil leak, so they topped up.
I believe they overfilled, and also, it was leaking engine oil as the spark plug wells were full of oil.
So I've drained the oil, replaced it with new.
Replaced oil filter.
Replaced spark plugs (they were also in very bad condition) and coil pack (it was slightly damaged/worn).
Replaced engine cover gasket.
So far no more leaks, drives smoother, but idles still a little rough, especially when using AC.
Particularly when using AC, engine light comes on if idling too long, or slow driving - random/multiple misfires detected.
Turn off AC and light goes away, or with AC on, when cruising, no light.
So seems to be a lack of power somewhere.
Which leads to this noise I hear when doing slow accelerations, sounds like the engine is struggling a little.
https://youtube.com/shorts/puQu22IfOuk
Finally, I also noticed, when AC is on, brakes get stuck (so if you pump the brakes before starting the car, and you get that stiff stuck feeling, that's what I feel) when doing slow menuveurs, such as park or 3 point turns.
Turn off AC and it slowly goes back to normal.
AC on, it'll happen again, but doesn't happen during regular driving.
Read on Google it relates to not enough power or something, boost or rather, for brakes to function properly.
So I feel like there's a common theme going on, hoping someone os able to advise what it is exactly, and how to fix.
