Engine mounts wont make the noise. But a good mount will manage vibrations better. Anyway, just want to clarify you are referring knocking sound from the engine. Cos Engine knock is term not related to knocking sound from the engine.

Engine Knocking is not the same as Knocking sound from engine compartment.

Hence the ECU has nothing to do with the knocking sound from the engine compartment.

The knocking sound you hear from your engine compartment is something rattling in the engine (which creates the sound). But you may have given a clue as to why when you mention cooler weather or using 97 less knocking sound .... perhaps this has more to do with temperature more than anything. Perhaps the answer lies in the heat causing certain parts to expand drastically and that could be making the sound. Hard to diagnose without actually looking at the engine which its making the sound. Can only trouble shoot as what where to direct the technician.

The mainly different is the plug.

I have to clarify, the noise is not knocking sound from engine compartment. It is engine knocks aka preignition aka detonation aka pinging, whichever you prefer to call.

Yes, but we don't change the spark plugs every time we send the car for service. Once in 3-4 years is affordable I believe.

IC. Perhaps have a look at replace the mass a Air Flow Sensors, adjust Air Fuel Ratios or even a less aggressive ignition timing and see if the engine knock reduces.

My preve is the turbo version bro. Only noticeable abit when i am going up an inclined slope and i need power from it.
Mileage around 84K and will be 3 years old this September.

Replacing MAF is possible. However if MAF is defective, driving the car would be extremely jerky and not fuel efficient. That's not happening to mine.

Adjust AFR and ignition timing, easy to be said, but only Proton could write a new map. Not our jurisdiction unless we change to standalone ECU. But why; it isn't a race car.

So what proton say when you tell them got knock?

No third party vendor can adjust AFR and Ignition Timing? If the problem really concerns you and car after warranty then can look for them.

This post has been edited by Anubis77: Apr 22 2015, 06:02 PM

They cannot turn on logging mode on ECU. Relying on fault code itself, knock sensor is allowed to knock till a certain tolerance before it triggers a fault. It hasn't been enough to trigger a fault. Knock is audible, especially with younger people who can hear high pitch metallic "krik" sound.

No one can remap Campro ECU. It is one of the most secured ECU, unlike Volkswagen etc.

The problem doesn't concern me. I'll just leave it for now as 5 year warranty gives me peace of mind. I'm not held accountable for mistakes that Proton has made, they would pay the price of replacements instead.

Ic. Didn't know that proton secure Ecu so tightly. Too bad for all the owners then.

May I know if the Preve LE version is still available for sale at Proton showrooms?

My LE already used for over 1 year. Real LE only 100 units.

Go contact a salesman, they can change the rims and install bodykit to look like LE. Only thing is you don't get the leather seats.

Thanks! I was quoted 79k for LE version from an SA in Sri Petaling, was wondering if this is a legit LE or just an overpriced Premium variant with added R3 OEM kit. How to confirm its genuine LE model since only 100 units were made?

You can google on "Engine Knocking" or "Engine Pinging". Wikipedia has a pretty comprehensive article on it. The sound of the engine knocking should be what that was described, and the potential causes to the pre-ignition that causes the knocking are also mentioned. Anyway to save you trouble, here it is.

http://en.wikipedia.org/wiki/Engine_knocking

This post has been edited by SportyHandling: Apr 23 2015, 08:48 AM

Car is under warranty so it makes little sense to send the car to a 3rd party vendor to fix the flaw. But as mentioned, the engine knocking may not bother people too much if the sound is not very loud (it is usually minor but audible). Only in very old cars, in my experience, then the louder knocking sound may be a bit annoying, but the car can still be driven as usual without any issues. It is just that the knocking sound is not very pleasant as it is extraneous.

I am just surprised that a new car that is less than 2 years can show this knocking sound. Though I understand others may not experience this knocking that I am experiencing in my car (only with Petronas fuel).

Looks like you travel a lot in your car having clocked 84,000km in a less than 3 years car. My previous Nissan Sylphy's mileage was only about 51,000km when I sold it at 5 years old.

Coming back to the Preve Turbo, yes, the knocking sound will usually come up when going up an inclined slope, and due to this condition the engine needs to work harder at a the same RPM to accelerate the car up the slope. Fortunately, in my case with Caltex fuel, there is little to zero knocking on the car even when going up an inclined slope.

i thought LE was sold out ady.. if Preve LE, should come with bodykit, rim, leather seat.. leather in door trim, console lid, and the car body is only white..

or maybe your SA want use LE pricing to help you borrow loan it isnt??

I know the sound because the first gen wira in my home has it. The damn thing is still going strong after 20 years, already overhaul along the years of course.

I will test on Caltex when i have the chance. My company right now only use Petronas, and the few designated pump we can go doesnt have RON97

Dear All,

Officially became the proud owner of prev exec solid white.So far so good.The only issue a bit sluggish at first but it get better once it gain momentum.

I would like to ask if exec version has the feature to check balance fuel..as in how many km i can go?if yes, how do i set it ?

Thank you.

That 100unit of LE is all white color , year make 2013 . i dont think it worth for 79k for a 2 yrs old car