knocking in front end only while accelerating. sounds like it is coming from drivers side under hood.

Was in the shop because it wouldn't start in a parking lot far from my house. While it had to get fixed for gas pump they said it also was blowing fuses; It turns out the security system was shorted. Then I went to pick it up and they said the chassis was all rusted out around the motor & trans mounts and that's why it clunks off and on while driving. Piece of s----