Carb Noise

[87REGALPRO]

Does anyone know why a carb (2bbl rochestor) would make a chattering noise once the ignition is switched on? Its not the starter the car starts fine. The noise continues even when the engine is running. not a valve either. Happens when power is turned on BEFORE the car is started. I know its electrical but why does it do that. Btw its a replacement and a hose was forgotten. The small one that goes from the right side to the lower part of the carb. I'm going to tell the guy when I go to payoff the job. I'll get some pix as some as I can get a cam to use. :x

 

[username]

I have a 3.8 in a cutlass that does the same thing it clicks continously for about 30 secs to a minute when the ignition is switch on. I never even gave it a second thought because I'm soon going to replace the engine but that is curious that other vehicles do it to.

 

[87REGALPRO]

I have a 3.8 in a cutlass that does the same thing it clicks continously for about 30 secs to a minute when the ignition is switch on. I never even gave it a second thought because I'm soon going to replace the engine but that is curious that other vehicles do it to.

I'll let you know after friday when I have it checked. I think its a vacuum issue. I to want to swap the engine out but for now its my a to b car.

 

[IhaveNoPantsOn]

The Quadrajet in my 87 GP does the same thing. Just a steady clicking from the carb for about 15 seconds after the key is turned on. I've always assumed it was supposed to do that, sine it always has.

 

[Pontiac455]

The noise yer hearin is the anti dieseling stepper motor. The little one wire motor in front of the throttle linkage.

 

[87REGALPRO]

The noise yer hearin is the anti dieseling stepper motor. The little one wire motor in front of the throttle linkage.

So its not a big concern?

 

[313Jay]

its the MC solenoid working, I believe