I have a 93 chevy silverado Truck with a 305 TBI. I installed a throttle body spacer, and also at the same time I put a container of injecter cleaner in the gas tank. Now I hear this annoying buzz from inside the truck. But it is not noticable from the outside of the truck even with the hood open. I think it is the injectors. The guy at the auto parts store told me it is because of the throttle body spacer. He says it is because the sound of the injectors is bouncing off the inside of the intake. I was just wondering if anybody heard this noise and what it was.

 

It could be the injectors hissing, but it could also be a leak in the tbi spacer. try shooting some carb cleaner through the spacer seems and see if the engine bogs down. if it does you've got a vacuum leak there. I have heard injectors hiss, so it is possible to just be an echo.

good luck,
Mike

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1989 RS.. 355, Hypereutectic pistons, double roller cam, double roller timing chain, accel wires, blue streak cap and rotor, rapidfire plugs, chevy caprice 350 chip, 200* fan switch, 3 angle valve job, 3 inch cat-back exhaust, 3 core radiator, 3.73 gearing with POSI.

 

I bet its just a hiss. I have a spacer and I can hear a hiss. I just had a vacuum leak repaired so I know its not that. But since I installed the Edelbrock intake I can hear a hiss in the car but not outside or under the hood. I would still check for a vacuum leak but if everything is bolted tight and the car (or truck) still runs smooth, I would not worry about it. You'll know when you have a vacuum leak.


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1990 RS 305 TBI T-5
.5" turbocity spacer
Edelbrock TBI intake
180* stat
Summit 14X3 OpenElement W/k&N
Hooker 3" Areochamber
MSD - Wires, Cap, Rotor, Coil
Bosch Platinum +4 plugs
Metallic Red w/28,000 Pampered miles
(Still have the original wiper blades)

 

Hey Fahqueer... The "buzz" may be from the 33" Super Swampers.
You put that chip in yet?

 

I do not have 33"tires on it.I just got a pair of slicks for it. No I did not get the chip yet.

 

I checked for a vacuum leak and if there is a leak at the gasket but I could not find any.

 

Its probably just an echo then. You haven't heard the engine surging have you?

Mike

 

It does not surge at all. I guess I am just going to remove the spacer and see if it stops.

 

you are going to have to change you login name fahq. policy changes are going into effect.

 

Could you please explain why I have to change my log on name and what polocy are you referring to.

 

fahq clearly your name is vulgar and offensive to a prude. The decent folks who share an interest in TBI third gen. f-bodies, wish not to have such trailer-trash truck-driving profanity displayed on the board.
So change your gotdam mthrFAHQn Kogsugn FAHQggot a$s name now.
Sorry, I'm just so offended.
Thanq mr. snuffle-up-pigs-a$s ,That is what your name implies, is it not?
(j/k) no insults intended.

[This message has been edited by Formula9 (edited August 25, 2001).]