Sounds like engine knocking or pinging.....

Retard the inginiton timing might helps.

yup turn anti clock wise direction but turn little bit only...

the skrew is at the back of the carb. facing the wall

subang ss15 same row with lots of 4D betting shop
near the mcdonald gazebo
using castrol signboard
next to a accesies shop

there another 1 at subang ss14
beside the caltex and proton dealer/servise center 1

these to spare part shop very good 1
no potong ppl 1  

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Added on October 9, 2010, 10:30 pm
the price is right and the workman ship is not over charge
quite good ma
where is ur workshop
care to share ????
but the engine oil get the 15/40 sae rating 1
have huge diffrent
engine will be more responsive 
i suggest castol gtx 15/40
only cost 75 onli
thinner oil ma
but temp will high abit on hot day
but now trying eneos 15/40
see how 1st

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Added on October 9, 2010, 10:38 pm
auto will be better if u everyday stuck at traffic
but need very good attention 1
when kong d hoiyooo
the price to replace it will make you
my manual gearbot left production factory until now no problem
summore i kaki very gatal summore
the clutch dint even change be4
wei olmost 20 year d 
if u choose auto make sure u change the atf frequenty
beter still install a aftermarket atf cooler (not a must)
alot ppl dunno 1
until all gasket and bodyvalve inside habis d
then die at road side

in term of diffrent between those two
manual have better fc , pick up , mid range , top speed and olmost everything
but stuck at traffic die will make u regreat 
hahahahahahaha

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Added on October 9, 2010, 10:47 pm
as long the single row are thicker as the double row 1
i saw 1 sifu cipan full modified his 4g15
sommore drag kaki
olso no problem

get full copper 1 if have more budget
they are more resistent to corrosion and rust
when bocor can patch back sommore
our stock 1 olso cooper 1 ma
hehe see me talk cock pandai
still using stock 1 wan ajar ppl