i have a 97 chevy blazer thathas a fuel pump on its way out,
sometimes when i turn the key the fuel pump doent prime and it have to hit the tank with a hammer a few times and then it primes and starts. Im pulling the fuel pump tomorrow, but I really cant afford the 330$ for a new one? is this problem usualy circuitry, or wiring or what? is there temp fix or anything?

 

You can get a fuel pump under $200.00 the reason your looking at $330 is because they are trying to sell you the complete module which is a plastic tank with the fuel pump and sending unit all together, you can unsnap the module and just replace the pump. Get a new sock for it too, they are only $5 bucks. I install performance LT1 pumps in them but search around some different parts places for a pump until you find one, try www.rockauto.com or even www.nopi.com

 

but wouldnt my problem be in the sending unit? I dont think it is a mechanical problem, it is electrical isnt it?

 

I can't imagine how a problem can be in sending unit. Had simular situation with my (sold) Crown Victoria, except that pump finally went out ~150 miles from home. Assembly was like $250-300 in autoparts stores, I bought just a pump for $50 off ebay, put it in old sending unit, problem solved.

 

pump only is still over 200$ =[