Buzzing sound from T-Body>?

[GSXlaunch]

Well the past week I have been having a problem with running extremely lean. My walbro is not getting enough volts or something. It is not whining or making any sound whatsoever. Now when I turn the key to the on position I hear a buzzing sound coming from the throttle body area and again when I turn the key back to off. Occasionally the buzzing sound will continue for 15-20 seconds until is slowly tapers off when the key is in the on position. My mpi relay looks fine and I tested the fuel pump relay via the pocketlogger and it clicked on and off normally. What does this buzzing sound signify? What else would cause low voltage to the pump? thanks

 

[GSXlaunch]

I know someone has to have run into this problem before. I tried running the pump directly from the battery pos terminal to the power wire going down to the pump and I got nothing. I tried it with the key in the on and off position and nothing. I guess all I have left is to pull the pump and test it that way.

 

[psychlow]

I'd start by hooking a multimeter up to the pump connector and seeing what type of voltage that line is getting. If it's not at least 12V, something is up.

You may have a grounding issue from the sounds of it.

 

[steve]

The buzzing is likely the ISC. The do a little of that normallyand the ECU homes the stepper but if your having voltage problems it could be effecting the ECU also causing funny problems.

 

[GSXlaunch]

It was a ground issue. One of the rewire grounds came loose from the ring terminal in the rear of the car...is was not noticeable since the wire was still inside the plastice clamp portion the connector. Here the shitty part...I didnt find it until I had already removed the pump and housing from inside the tank. In doing so, I ruined the housing by kinking the hell out of the line on top of the pump housing. Now, I need a new pump housing and wiring and I need to reinstall my pump and rewire kit. All this because I overlooked a simple ground wire. I'm very dissappointed in myself for missing that. Oh well, at least I dont need a new pump.

 

[steve]

At least in Texas you stand a good chance of finding a non-rusted out fuel pump assembly at a junk yard or you can double clamp a fuel hose on whats left of the hard line and hope it doesn't leak.

Steve

 

[GSXlaunch]

Yup...I am hopeful that all 1G pump housings are the same (non-turbo and turbo) I will soon find out as I am headed to the junk yard in a few minutes. I am not taking any chances with the kinked line I have now. With my luck, it will rupture midway down the track at 30psi of boost and at the top of a gear. I really need a volt meter. Thanks by the way