Ozsubie

Skip, I had a problem with over-rich mixtures on boost caused by the fuel return line going back to the tank getting blocked. Mine was slightly different in that as soon as the computer switched to open loop mode black smoke started pouring out the exhaust. This problem did happen very quickly though, one moment OK, the next smoke everywhere!! The FPR was initially the suspect component until I disconnected the return line in the engine bay and found it was pressurised. In my case the blockage was caused by the length of rubber hose connecting the return line to the tank. I had just replaced it a day ago with what the shop assured me was EFI hose. Turns out it wasn't EFI hose and the rubber all swelled up and it blocked itself:eek: