rgprobertsbridge

Hello all. This is my first post and I'm starting with a tech question. Has anyone had experience of a rhythmic chuffing noise in the engine bay on the nearside - sort of behind the glove box? It's really obvious at tickover and seems to be rev-related but is drowned out even at low engine revs. I thought it was a manifold blowing, but there's no sign of that. One mechanic thought it was something resonating in the fuel system and with a stethoscope found it loudest at the tank. We replaced the fuel pump but that didn't sort it. The tank must be acting as a sound box, because sitting in the car it's definitely in the engine bay... Another garage spent a lot of time looking and haven't been able to isolate it, except agreeing that's the area it seems to be coming from.. I'd be grateful for any ideas?

Hi Steve. Do you still have the back box for sale? Regards