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Noisy injectors?

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Old 03-12-2004, 01:28 PM
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Car: 1992 Camaro RS 25th Aniversarry Edition
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Noisy injectors?

how noisy should my injectors be? they are quite loud at idle and can be heard eaisly without opening the hood. i do have a Open element withe a K&N filter. is it normal to hear them "hiss" our should i not be able to hear them at idle? runs fine just dont know if thats normal.
Old 03-12-2004, 02:07 PM
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Re: Noisy injectors?

Originally posted by 92MaroRS
how noisy should my injectors be? they are quite loud at idle and can be heard eaisly without opening the hood. i do have a Open element withe a K&N filter. is it normal to hear them "hiss" our should i not be able to hear them at idle? runs fine just dont know if thats normal.
It is normal. The tock air cleaner assemply does a good job of dampening out any sounds from the incomming air and injectors tick/hiss. I think it sounds really cool and is a sound you don't hear on your regular every day small block.
Old 03-12-2004, 02:41 PM
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often confused with tappet noise.
Old 03-12-2004, 06:50 PM
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Car: 1991 Chevy Camaro
Engine: 305 TBI
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That's what that noise is! I installed an open element and since then I started hearing that noise but I didn't think about it. I kinda didn't like it at first but now I think its pretty cool.
Old 03-12-2004, 07:28 PM
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Re: Re: Noisy injectors?

Originally posted by ShiftyCapone
It is normal. The tock air cleaner assemply does a good job of dampening out any sounds from the incomming air and injectors tick/hiss. I think it sounds really cool and is a sound you don't hear on your regular every day small block.

after a little playing around with it i noticed that it is REALLY loud when its cold but when it warms up it goes to the sound i like. the sound you are describing
Old 03-13-2004, 07:28 PM
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Some of the hiss you are hearing is probably the idle air control valve (IAC). As the engine warms up the valve closes a lot but not completely. The injectors make more of a ticking sound, I've never herd mine hiss before.

Steve
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