[CU2] funny noise from the engine when slow accelerate

**aaronng** · 26-08-2008 10:03 AM

Originally Posted by eur001

The fuel is from dealer as my car only few days old. I think the dealer wont put anything other than 98 ron....

Dealers put in 95 RON. NEVER 98 RON.

Unless they said "full tank of premium fuel" in your contract, they might even put 91 RON!

**Bobjones** · 26-08-2008 12:54 PM

Well I filled up with 95 the other day and under light accelleration up hill I thought I heard a similar noise...

I doubt if it is audible engine knock/detonation, it may be incorrect gear selection and thus vibrational load from the gearbox/torque converter, it was pretty faint and I have only heard it once. I will be calling the dealership later in the week when I have a free moment to ask the question. I think it may be worthwhile contacting the dealership NOW and booking it in for its 1000km check up and noting the problem...

**aaronng** · 26-08-2008 01:05 PM

Originally Posted by Bobjones

Well I filled up with 95 the other day and under light accelleration up hill I thought I heard a similar noise...

I doubt if it is audible engine knock/detonation, it may be incorrect gear selection and thus vibrational load from the gearbox/torque converter, it was pretty faint and I have only heard it once. I will be calling the dealership later in the week when I have a free moment to ask the question. I think it may be worthwhile contacting the dealership NOW and booking it in for its 1000km check up and noting the problem...

Why don't you just top up the remaining 1/2 tank with 98 RON? If the problem goes away, then you will know that it was the petrol's fault.

**Bobjones** · 26-08-2008 01:09 PM

Yep I was going to try that, however, having built a few engines in my time I know detonation...and this was definitely not that...

**eur001** · 28-08-2008 06:29 PM

went back to dealer yesterday to get it test by technician. Clearly, the guy heard the noise. They said it "might" be due to the fuel...or else something else.. They suggest to put in other premium fuel and have a go again. They will do a proper check during 1k service if the noise still.
I guess will have to put in BP 98ron, as i cant find any mobil in Perth.

**LXRY** · 28-08-2008 06:57 PM

Originally Posted by eur001

went back to dealer yesterday to get it test by technician. Clearly, the guy heard the noise. They said it "might" be due to the fuel...or else something else.. They suggest to put in other premium fuel and have a go again. They will do a proper check during 1k service if the noise still.
I guess will have to put in BP 98ron, as i cant find any mobil in Perth.

How can you get clicking noise from fuel under low acceleration ??

**eur001** · 28-08-2008 08:39 PM

Originally Posted by LXRY

How can you get clicking noise from fuel under low acceleration ??

Actually, thats very good question.. i asked them, but they cant give me any answer. They just asked me to try. Something to do with the engine when not using the right fuel.. Hopefully its a small problem.

**Bobjones** · 29-08-2008 02:24 PM

Under light acceleration or load, you can get detonation as there may not be sufficient fuel or fuel of sufficent octane to reduce knock, but to be audible the damage is already done. I did some tests on my car last night and its not engine as far as I can tell as it does not happen in N or P. I cannot locate the exact issue but I think it is closer to being gearbox related. I am running Ultimate, and have let service now as it goes in Monday for its first check. I will not be accepting bullshit excuses...

**eur001** · 29-08-2008 06:41 PM

Originally Posted by Bobjones

Under light acceleration or load, you can get detonation as there may not be sufficient fuel or fuel of sufficent octane to reduce knock, but to be audible the damage is already done. I did some tests on my car last night and its not engine as far as I can tell as it does not happen in N or P. I cannot locate the exact issue but I think it is closer to being gearbox related. I am running Ultimate, and have let service now as it goes in Monday for its first check. I will not be accepting bullshit excuses...

Please let me know what they said and whether they solve your problem. Thanks!!!

**Bobjones** · 01-09-2008 10:42 AM

Car is in today mate, and the first thing they said was, are you running 95, to which I politely replied, well actually its running 98, and combined with the fact that if it is audible and fuel related then the damage has been done (audible detonation means it is extemely bad) to which they replied, unsure what it could be, to which I replied, lucky there is a warranty then...

Get it back at 3pm so should find out then...

**Type R Positive** · 01-09-2008 02:03 PM

I have tried to replicate what you guys are getting, nothing.
Even when taking off in 2nd or 3rd. Slow, medium, or fast take offs from stand still, doesn't matter. Nothing.

Must be an auto thing? The yanks have reported this issue with auto as well:
http://tsx.acurazine.com/forums/showthread.php?t=684180

**eur001** · 01-09-2008 03:19 PM

Originally Posted by Bobjones

Car is in today mate, and the first thing they said was, are you running 95, to which I politely replied, well actually its running 98, and combined with the fact that if it is audible and fuel related then the damage has been done (audible detonation means it is extemely bad) to which they replied, unsure what it could be, to which I replied, lucky there is a warranty then...

Get it back at 3pm so should find out then...

I made a complaint to the service manager this morning. They said they will bring it up to Honda Aust and see whats the explaination.