Mechanic mistakenly put gear oil in tank, the pump is knocking

remove the pump again check for anything restricting the pumps inlet and make sure when the pump is put bacl that none of the pipes has a twist or bend that will restrict the flow of fuel

Check the fuel pressure regulator and the fuel return line to the fuel tank for a restriction to flow. The map sensor will cause the flooding if it malfunctions too.

SOUNDS LIKE YOU HAVE BEEN VERY BUSY,THE ONLY THING I CAN THINK OF TO CHECK WOULD BE THE EXHAUST FOR RESTRICTION (COLLASPED PIPE,MUFFLER ,CAT CONVERTER) HOPE THIS HELPS .LET ME KNOW.

Sounds like head gasket trouble. Thicker oil seems strange thing to do.

No. You have to lift the engine. The distributor has a gear on it. this is what drives the oil pump. Most times 99% the bearings are worn out causing low oil pressure. I have replaced oil pumps, not because they were bad, but because someone wanted a high pressure pump. The first thing I would do if I suspected oil pressure problems is put a mechanical guage on the engine. If the oil pressure is normal then all you need to do is replace the oil sending unit. Of course if you knocking in the lower engine, then it would be bad bearings. Forget the pump. you need to replace the engine

remove fuel line from fuel rail end and put switch to on position let some fuel come out from line, then replace fuel filter, check oil if any water marks in oil if not fix fuel rail line back you are readu to use it normal.

Sounds af if you may have a transmission issue. I would take it to dealer to have it checked. Noises can be hard to track down even if you are standing next to a vehicle unless you have proper training in vehicle drivability

Remove the fuel fil hose,and vent hose,and remove fuel tank straps,with jack supporting tank,lower enough to remove wire connector,and fuel lines .Remove tank from under vehicle,and remove the ring retainer,and pull the fuel pump assem,from tank.Follow instructions in the box with the new fuel pump.

hi,they have a bench tester for testing fuel delivery,spray pattern,i think only calibration center would do testing, if your problem is only fuel knock,try to put some atf oil in your fuel tank,full tank,try one liter of atf,ty