Engine noise when accelerating heavily low speed in high gear

[madasafish]

I was taught to change gear when a car laboured. The last pinking I experienced was a 1929 Riley 9 Monaco. Adjusting the ignition  timing via the lever on  the steering wheel - it had a series of levers which rotated the magneto to advance/retard the ignition  - solved the problem.   That was in 1966. :-)

[guest7027]

Thanks for it replies - I was testing this again over the weekend whilst out and about.

On a completely flat road, empty car and pushing pedal down about half way either in 4th or 5th from 35mph to 40mph is when I can reproduce the noise. - I'm not really aye that this is 'labouring the engine' in these gears at these speeds?

As soon as the car hits 40mph the noise stops. The noise only seems to happen at 35-40mph in 4th and 5th gear - even does it going downbank.

Doesn't do it at all in 3rd gear at these speeds.

[Johncb500]

  Hondas have always had  high revving motors,

 I personally wouldn't give any engine full throttle below 3 ,500 RPM,ideally 4,000 then let it spin up to its max
,in the case of the Jazz,about 6.500rpm,

  its better for the engine to let it spin,rather than flog it like a steam engine .

[Jocko]

I try to avoid giving full throttle under any circumstance but there again, I am particular;y frugal when it comes to revs. My ScanGauge records the maximum revs for any given trip or day and I seldom ever exceed 3500 rpm. I have only ever recorded in excess of 4000 once, since I fitted the ScanGauge. Today, I checked the revs after my morning in town commute, and the maximum revs recorded were 2305. But that is just my driving style.

[guest7027]

Just to clarify, although I do get the noise as full throttle, I can also reproduce it with the accelerator pedal only half way pressed down which I don't think is full throttle?

[NickP]

Just found this thread.
Our Jazz makes this sucking noise you describe in similar circumstances.
Moderate (not necessarily full) throttle in 5th.
Sounds like induction noise, filter housing, etc.
I've experienced pinking in other cars. This sounds completely different in my opinion.

[Jocko]

Welcome Nick. Have you checked there is a filter element in the air filter box?

[madasafish]

In my experience excessive induction noise is associated usually with air leaks - caused by poor fitting or splits in flexible joints which are difficult to spot *...or as Jocko says no air filter element..

* usually only found by removal and stretching.

[guest3793]

check for air intake leaks with some carb cleaner.
idle the engine and squirt carb cleaner around the intake route. make sure you squirt around gaskets and hoses.
The engine note will change if there is a leak.
I would say it needs a long hard drive as modern engines appear to be suffering from carbon build up when not driven hard enough. Red x may help..
I wouldn't be pouring water down the intake, too much and you will wreck the engine.

[NickP]

Quick update for my problem...
I'd been irritated by the sucking noise, but not sufficiently bothered to investigate it until I saw this thread.
Having given myself a wake-up slap, I had a dig under the bonnet and discovered that one of the filter cover side clips has lost its plastic locking end (presumably during garage service), so left side of cover is not being pulled down tightly.
For the moment, I've just pushed it down more firmly, and it seems over the past week or so, I haven't noticed the noise as much. Hopefully, this is the cause.
Now, I need to find out whether I can get a replacement clip or need to either buy a whole replacement airbox or cobble together some sort of diy fix.

[MartinJG]

I can only describe the noise as a suction noise

Probably just the turbo.

[olduser1]

Thosee clips can be obtained from scrap yeards or your dealer , quite common to have one go missing. Have you checked around the a/c to see if its lurking uinderneath ?

[madasafish]

Airbox clips are cheaper from a main dealer. I had to buy one - under £6 iirc..- I "lost" one..

[guest5079]

It may be that over time the clip has disappeared. BUT the first time I did an air filter, I dropped one down into the engine bay. Undo the engine tray one side ( under the air filter) and keep banging the plastic mine just popped out because the two trays dip towards the centre. Clearly a design fault that one can drop the pesky things.Good Luck.

[Jocko]

Clearly a design fault that one can drop the pesky things.Good Luck.

That design fault? Are you talking about God and his design of the human hand?