I’ve been trying to track down a faint ticking noise I hear under moderate to heavy acceleration in my 05 LX470. I’ve had exhaust manifolds and gaskets replaced with OEM parts. That helped quiet it way down. I tighten my spark plugs- most of them had loosened up. Still need to fix a cracked coil pack stem- not sure if that’s making a noise under acceleration, but I could imagine there’s a good fireworks show in that tube. I’ve read a ripped firewall boot could help the injector ticking transmit into cabin. Tonight I took a look at my boot, and it is ripped. Anyone have any tips, tricks, advice on replacing the boot? Looks pretty tight to work down there. Maybe best way is through the fender well? Any advice appreciated.