Funny sound when i wack near red rev

[Cool79]

Hi guys,
Sorry to ask so much questions...

anyway, last night i tried this...
wack from 80-120km, i can hear a tweak sound.
tried it a few times, still the same

then after dat i off the air con n try again, there no sound coming out, is it due to the cut off of the air con?

or is the air con up the lorry?

[hiir]

could just be the aircon filter jus dirty..

[jB]

your car sucked the air filter till out of breath? :rofl: care to share at which gear?

[battle]

I got the sound only when I hit 7000 RPM.
My A/C is not on. Sounds like come out from engine, so suggest not to touch 7000 RPM mark.

[Cool79]

mine is at the curising gear i think... mine is auto....

[X_ist]

I got the sound only when I hit 7000 RPM.
My A/C is not on. Sounds like come out from engine, so suggest not to touch 7000 RPM mark.

wah, whack till 7K ah bro..haha

[Cool79]

wah, whack till 7K ah bro..haha

lol
normal driving i move ard 2.5 to 3rpm 1 le...

my bike also when hit rpm 3 then i change too....
but bike FC is 14km.... CS3 is like 11km

[ft8478b]

it is the aircon. dun wori too much...

[Cool79]

it is the aircon. dun wori too much...

is there a problem for the aircon ma?

[battle]

wah, whack till 7K ah bro..haha

Ya, only tried 3 times at PG, SNS. After tt never liao ; p

[desmundo]

is it the rev cut thingy?? stock ecu cut at 7200rpm leh ... but not tweak sound leh ... it sound like a horse lao sai...

[Cool79]

ps ps
is not hit red rev, near to....

[MIA]

Hmm.... heard some bros... is the air con pressure relive valve.... Dun Rev to high la.....


:D

[numatic]

Hmm.... heard some bros... is the air con pressure relive valve.... Dun Rev to high la.....


:D

yeap...its the aircon pressure relief valve...cheap mans BOV...hehehe

[battle]

Hmm.... heard some bros... is the air con pressure relive valve.... Dun Rev to high la.....


:D

Don't dare liao... scared wait engine piang or something happen then siao liao... ; p

[Cool79]

normal driving also got the sound, hehe
possible to solve the relieve valve thing ma?

[ft8478b]

u only get this sound when u rev hard with aircon on... once u off ur aircon, even u rev till 8K RPM also no sounds.. yup... it sound a bit like mini BOV... try not to do it as it is adding lots of unnecessary stress on ur aircon compressor.. if u do it too often, definitely ur aircom compressor lifespan will be reduce by a bit... when wan to whack, off aircon as it gives you more power cos compressor not taking away power from ur engine...

[sidon101]

Haha... I went to try it after reading the tread and wack my engine till 6k+ RPM with aircon on while stationary... Really sound like BOV sia...

[Cool79]

i asked my friend who are driving CS3 before... she say onli CS3 got this thing
the rest of the car don have... lol
it's normal for CS3

case close

[kqkqcinta]

better to meet up some bro and take them for a ride to determind. maybe something is wrong somewhere, but due to the fact we wont know by the way u write, unless we sit inside and that might help :)

just my 2 cent :P