05 gtp maf sensor causing rattling noise

[pontiacGTP123]

Ok I am still trying to figure out this dang rattling under load/acceleration noise. I have gutted the cat, replaced plugs/wires (autolite 606's) and still didn't help. Well this morning I unplugged the maf sensor before I went to town and the car ran perfect. Seemed peppier and made no rattling noise at all. So I went to the parts house and bought a new maf and replaced it in the parking lot and as soon as I did it started rattling again when I got on the road. My car does have a open cone connected to the maf. Any ideas? I'm getting aggravated with this.

[Scottydoggs]

vid of rattles? could be the pulleys on the front of the engine.

maf and or the screen wont rattle.

[pontiacGTP123]

I know the maf won't rattle itself, but I believe is causing spark knock. Which would be the rattle. If I unplug the maf it runs great and doesn't spark knock, but as soon as I plug it back up it will start rattling again under load at a certain range of rpms.

[Scottydoggs]

What gas you using? that dont sound right really.

[pontiacGTP123]

Premium, always have

[Below Average Joe]

Dumb question since I'm not SC. Could the coupler be shot and only spin once under load causing the rattling noise?

[Scottydoggs]

un plugging the maf wont make a worn coupler shut up at idle. higher idle would tho. coupler sounds go away when giving it gas and in the throttle as well. you only hear it at idle.

[nik12937]

The 3800's do make a strange noise in general when running an open cone, my 05 makes a clacking/tacking sound under load that goes away if the stock air box is in place. Just a thought

[pontiacGTP123]

That's what mine is doing. I put the stock air box back on and and now can't hear it. I'm just gonna get a aeroforce and tune. Then i will know what's going on with it.

[Below Average Joe]

Thanks Scotty