I had the in-tank fuel pump on my Volvo yesterday and I need to find out something. Before the car broke down, it was running fine to a point. What I mean to say is that I would have to back off of the gas pedal when the car got to about 2-2.5 RPMs for it to kick into gear.

Now that the in-tank pump has been replaced (yesterday) we are having hesitation troubles. It takes about 5 or more minutes just to really move. We are just jerking along. That tends to make those behind you extremely mad. I am also hearing knocking from behind the driver's seat area but that was only for a short period of time. It did eventually stop.

My son was the first one to take the car out yesterday and he mentioned the hesitation but when I finally took the car out, I had a little hesitation but then the car seemed to drive like it should. Actually it went into gear alot quicker without me having to back off the gas pedal. The car was pulling more RPMs than it did before it broke down.

Now, when the mechanic changed my pump, there was a "peanut shaped" metal piece on the fuel pump holder and the mechanic took that off since he didn't know what that was for and just put the rubber like tube that came with the pump in it's place. What is that "peanut shaped" metal piece and what is it there for? Did the mechanic make a mistake in replacing that with the hose? There also was two round rubber seals or gaskets, I would say about 4" in diameter which was left in the box by the mechanic as well.

Please, oh please, someone, tell me what the deal is here.

Thanks