rattle and smoke, Help!

[Aydza]

HI everyone, got a problem with my N15 GA16DE
my car rattles and smokes under load and acceleration usually up hills too.
its fine when it idles and when maintaining speed on level ground.
it did it once a month ago but last 2 days it has gotten frequent and im getting worried.
when it does it, it rattles and hesitates to accelerate then large puff of whiteish blue smoke and clears and then i have full power.

compression is fine
oil was low and i have topped up
coolant is fine and not milky
when it rattles it sounds like a diesel engine
the smoke is not constant

I dont believe it is a blown head gasket or worn rings because it still has all its power when this problem isnt happening, but correct me if im wrong


ive heard these can be the problems
VCT is playing up
PCV valve
valve stem seals

i do need help ASAP but any help is better than none

 

[CoV]

White smoke is a lot of oil burning. Blue is a little burning.

When you say compression is fine, what figures are you getting?

The rings are a moving part and press out into the cylinder wall when load is applied. If they're not sealing and oil control rings are not scraping this will let oil in.

Do you have an oil leak?

 

[Aydza]

White smoke is a lot of oil burning. Blue is a little burning.

When you say compression is fine, what figures are you getting?

The rings are a moving part and press out into the cylinder wall when load is applied. If they're not sealing and oil control rings are not scraping this will let oil in.

Do you have an oil leak?

she never burnt any oil even considering the amount of miles shes done and all oil leaks have been fixed
but i have actually fixed it i put a new set of spark plugs in and swapped my rocker cover over with my new spark plug seals, shes runnin' mint. could have been a dodgy plug or my PCV valve but no smoke anymore and no funny sounds or rattles. must have been a misfire which has the worst symptoms

but thank you for the quick reply!