ahrmike

tune up??as in spark plugs, oil, air filter, pcv?

harrison1990

i have recently change the spark plug
im using the NGK platinum spark plug....which i change it by myself without any experiment...sound stupid...ahh..

i bought the car last month...the previous owner said he is using the mobil 1 0w 30 oil.... i think he is using the wrong one...
the oil filter seems to be very old...
what is a pcv

my car is totally stock...

harrison1990

i took some advice above...!
whack the map senser
andi have seen some improvement..(faster respone and sound improve)
but...shaking still occur when droup below 1000rpm in first or reverse gear

alSpeed2k

When you first start the car and the engine is cold, the car will idle at 1500rpm. As it warms up though, it is normal for the rpm to drop to 1000, although not below that (at least not for me). Under what conditions is the car going below 1000rpm?

alSpeed2k

Hmm, thinking about this some more, er, have you driven manual for very long? If the car is barely rolling and at such a low rpm, maybe clutch in a little earlier?

s2kobsession

yup, the car is def about to stall. as everyone else said, try the MAP whack trick. When your rpm drops below 1k, don't tap the gas pedal... let it learn itself

harrison1990

ya...thank you guys....
but...my car is funny......
when car warm up....it will fluctuate at around 700rpm-1000rpm or 900-1000.........but the car wont stall ( no sign to stall )
and i have just discovered........
the shake will also happen when idle...in neutral
when car is warm.........rev up or over 1500rpm.......
off the gas...rpm will start to drop...right?...
when it hit below 1000rpm...car start shaking (1-2sec)

when car is cold...it wont hit below 1000rpm...and the shake disappear!

harrison1990

i open the hood.......and try to find out where the shake came from...
use the throttle body to rev...
and the shake is came under the engine...

NikosX

Its the DAMN MAP SENSOR. Buy a new one.

w00t692

run NGK iridium spark plugs.

Toss those platinum's