it's all about ur right foot? right? gently or manly
if u based on vacuum meter.
but high rpm = full throttle (*usually)

This post has been edited by huzaifa136: May 22 2012, 06:33 PM

a lot of factors contributing to FC, not only on foot nor high rpm. It depends on the road condition, road gradient, road traffic, humidity, air density, air temperature, engine displacement, type of engine oil used, engine condition, tires (type, width, diameter), tires condition, COD (co-efficient of drag), vehicle weight and total volume in the cabin (weight of occupant/cargo). All these plays a role too in addition to "right foot" and rpm.

The original question was downhill engine braking = high RPM =high FC?

Now suddenly become complicated liao.

True for manual for sure. Because while coasting downhill in gear without stepping on any pedals, if I step on the accelerator I can feel the engine come back to life (start running on its own again). I turn to my friends then and tell them I'm using zero fuel at the moment That's why I always hantam those people who tell me they coast downhill in neutral (unless their car has carburettor)

What about CVT and 4 speed auto?

same

foot off throttle, TCU senses a downhill slope downshift to the most appropriate lowest gear (4AT) or TCU shrink the ratio (CVT), ECU cuts fuel to the engine, engine in lean mode. Can only hear engine humming, but actually exhaust has no sound (since no fuel or little fuel = no or little combustion)

This post has been edited by V12Kompressor: May 22 2012, 06:57 PM

In that case, the exhaust will be emitting clean air, right? Since there's no combustion, the engine is just sucking in air and pumping it out again through the exhaust.

Wait, the throttle is almost closed completely while coasting. So not very much air really.

This post has been edited by lhwj: May 22 2012, 07:10 PM

MY UR STICKER AND FR STICKER !!!!!

I didn't see any significant different before 1k service and after 1k service on my.RM50 can only get me merely 230km~250km or is there any way can be twist to increase?

oh yea ! wash throttle body got help for FC kah ? lols... my FC gone worst to even worst... now trying all ways to improve back FC...

Still very new lah. Wait until 10,000 km for it to stabilise. The usual tricks apply, light right foot, coast downhill, avoid traffic jams, don't drive short distances, correct tyre pressure (I personally overinflate slightly), etc. All mentioned above by V12.

This post has been edited by lhwj: May 22 2012, 07:30 PM

indeed. thats why the exhaust is silent (if pasang exhaust PRANG PRAAAANG) when going downhill.

the difference wont be significant. You'll have to wait for the 2nd and 3rd service then you'll get to see the difference after each service.

"engine condition"

Maybe you guys are right.still virgin.

anyone of you guys' cars still have issue with the rear brake "tak tak tak" sound?

tak tak tak / gruk gruk sound

Well, Bro...believe it...yu're bringing in some "fresh" air (more so nia..) into this thread at this point in time!

Guess when nothing more serious/important 2discuss, it's back to good ole FC topic!
Nvr fail 2hv a large audience wan! True?

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Added on May 22, 2012, 8:14 pmThks 2yu2, Bro!!
Yu're playing a good role here2...

This post has been edited by zeone: May 22 2012, 08:14 PM

yeah, gruk gruk also got

car almost 9 months edi this problem still persist after service rear brake 2 times...haih...now got 1 week spare time, planning to go far far till COE to service...

but the thg is, that sound can be heard frequently but not everytime when i drive, scared later reach there no sound abis lah

ps. Sincere apologies, Bros...
Hope din step on too many toes there...

haha

came here like half a year ago d, saw few ppl with same problem, even got name list for those going to SC together

now finally i got free time already, plan to rectify this problem once and for all (hopefully)

*shrugs*

pps. On a more +ve note, the FC thingey did help move the posts a bit further on...
Thread was kinda "dead" juz b4 that...

lol no worries

tbh i didnt really get ur sarcasm anyway