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CR-V::Clinical Rounds Routine maintenance, problems, solutions and repair

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  #1  
Old 07-08-2012, 06:02 AM
Gopal Gopal is offline
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Default Injector noise?

I have started noticing a strange hissing sound (from under the hood) when I press the gas pedal... but only under certain situations.

E.g., the V is moving smoothly at 30 - 45mph, no gas (slowing down). At this point, if I press the gas, it produces this strange hissing sound.

Any one else notice?

Any idea what it might be?



PS: I had an 1985 accord (the most beautiful body design, IMHO). It too used to produce this sound. That time I asked at the Accord forums and no one could either pin point the source or suggest a cure. However, several members mentioned the noticing noise that kept getting worse over the years. Many suggested it was the fuel injectors ... (hence the subject line).
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Old 07-08-2012, 09:08 AM
Jammy-J Jammy-J is offline
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This is an interesting problem, but I can't think why it would the injectors, a 'hissing' from the injector means there is a leak somewhere, either on the injector itself or the fuel rail leading to the injector, either way, you probably get a smell of fuel from the engine bay.

If you are brave you could remove the injectors and inspect the injection ends, then take super extra care and check the spray patterns, they should all be the same which is a thin mist.

I personally think you have a air leak somewhere, you should check your air lines to the engine.
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Old 07-08-2012, 10:41 AM
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Racoon Racoon is offline
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Do you track your fuel mileage, and has it changed recently?

Usually when I hear a hissing noise I think vacuum leak.

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Old 07-08-2012, 12:56 PM
alaskan155 alaskan155 is offline
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never had an injector make a hissing sound......

usually vacuum leak, get a can of starting fluid and spray it around the vacumn lines when idling, if idle increases replace vacumn line, would spray it light around the intake tube between throttle body/air filter.

also look at the intake snorkel(before filter) for damage/out of place
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Old 07-08-2012, 05:35 PM
downloader downloader is offline
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does the hiss sound change when you give in more gas? it could be the intake tube is cracked
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Old 07-09-2012, 07:02 AM
Gopal Gopal is offline
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Jammy-J : No fuel smell in the cabin or around. But, vacuum/Air leak is a definite probability. My cruise doesn't engage immediately, I've lived with it because that isn't much of an issue.

Removing injectors is probably out of question. V is my only car and I want it running all the time.

============

Racoon : My mileage hasn't dropped. The last refueling showed 25mpg - the exact average.

============

alaskan155 : How dangerous is the operation - i.e., spraying starter fluid in the engine bay when it is running? Also, I need to figure out exactly where to spray. Any diagrams/pictures?


=============

downloader : I haven't noticed any change in the sound with increased gas. But I'll be more attentive when I drive home tonight.


Thank you everyone for replies.
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  #7  
Old 07-09-2012, 07:18 AM
Jammy-J Jammy-J is offline
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Removing injectors is not that difficult, but I am pretty sure it would be pointless check.
All signs point to an air leak. The starter fluid idea is a good one, just dont go spraying it on the hot outlet manifold and you will be ok.

Last edited by Jammy-J; 07-09-2012 at 07:21 AM.
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  #8  
Old 07-09-2012, 07:35 AM
Gopal Gopal is offline
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Quote:
Originally Posted by Jammy-J View Post
Removing injectors is not that difficult, but I am pretty sure it would be pointless check.
All signs point to an air leak. The starter fluid idea is a good one, just dont go spraying it on the hot outlet manifold and you will be ok.
The Accord I mentioned earlier did not have the "slow cruise engagement" problem. That problem is unique to my V.
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Old 07-09-2012, 11:40 AM
alaskan155 alaskan155 is offline
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just keep it away from the exhuast/spark plugs and anything else hot and you'll be fine. best to do it with a cold engine
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  #10  
Old 07-09-2012, 03:39 PM
Gopal Gopal is offline
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I paid close attention while driving back home.

1. The sound doesn't change with acceleration.
2. Also, the sound is not a 'hisss', but a whistling sound, much like the sound of wheels on certain pavements.... 'wheee.....'.

Sorry about misleading earlier...
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