01-07-2016, 02:05 PM
Small update, Fuel Pressure Regulator was shot, found fuel in the vacuum line to the intake. Have a new one on it's way,hopefully install it tomorrow.
All 4 plugs were black, but the plug furthest back (#4?) was slightly less black. This makes sense since it was ingesting fuel through the FRP vacuum line which fits on the front.
Eliminating that fuel leak from FPR through vacuum line to intake should help, and I'm guessing the diaphragm leak was causing high fuel pressure in the rail. No wonder the fuel trims were negative. It's trying to pull fuel to get the o2 sensor reading right.
Currently I'm not doing any driving tests, I have a few things loose as I was checking sensors and for vacuum leaks. Will see what happens after the new FPR and then maybe take a drive.
'm still processing the long post above but thanks for all your help so far. Invaluable experience you have.
All 4 plugs were black, but the plug furthest back (#4?) was slightly less black. This makes sense since it was ingesting fuel through the FRP vacuum line which fits on the front.
Eliminating that fuel leak from FPR through vacuum line to intake should help, and I'm guessing the diaphragm leak was causing high fuel pressure in the rail. No wonder the fuel trims were negative. It's trying to pull fuel to get the o2 sensor reading right.
Currently I'm not doing any driving tests, I have a few things loose as I was checking sensors and for vacuum leaks. Will see what happens after the new FPR and then maybe take a drive.
'm still processing the long post above but thanks for all your help so far. Invaluable experience you have.