bubbling sound

[Dan1212]

Hi, i have a 1990 300zx TT and have this problem, someone already saw this ?

the fuel pump did a little buzzing/humming noise like it usually does, but I heard a bubbling noise like liquid flowing, from the back area of the car.

I haven't ever lost prime on the fuel system and the car runs great. There is a very slight hesitation if I punch it, going into the next gear, i.e. going from 1st to 2nd, there will be a very slight lag in 2nd and then the engine rpms pick up...

[evildky]

The nose is likely just the return line didn't get hooked back up correctly, not a big deal. The lag between shifts is either in your hear or an unrelated issue.