is it the throttle body????

[neighbrhood]

well I have a new problem I have a 2005 grand prix with 3800 no SC and this morning I went out and tried to crank and it did nothing then I try again and it cranks but stalls then the reduced performance light comes on..so I hooked my scanner up and it has code p0120 which is throttle body.. so I been messing with the TB cuz all of the auto part stores don't have them in stock and I had to order one and it will not be here til tomor..so I got it to crank up and run a few times by cleaning it ,unplugging then cranking and then plug back up and it runs but now it will not crank it just turns over.
and before I spend this 300 I wanna make sure its th TB and not and electrical issue like grounds or fuses since the code says it losses communication or not enough voltage
but im lost let me know where to start or am I on the right track, I need some help plz

 

[91parkave]

Friend of mine had a similar issue I found the throttle blade was sticking in the closed position so I lightly sanded by hand with 600 grit sand paper that area a little and no problems for a couple years.

 

[REDCRAPGP]

Before you spend the money on a TB from the parts store post a wtb ad first and save yourself some money.

 

[BillBoost37]

Yeah..cause many of us have one or two of those DBW things laying around that we can't use. I know for sure I have at least an NA. Not even sure if they are the same.

 

[neighbrhood]

I bought one from a scrap yard for 80 bucks and put it on and it still didn't start.then I started playing with the fuses under the hood and it fired right up then I drove it and the check engine light even went off and its cranking everytime now..sooo I guess its a fuse/relay that's out ill put new ones in tomorrow as long as I can get to work tonight it'll be ok..