you have bad orings, wrong size, orings or you broke the other injectors or the their orings
No, vinegar is acidic and may melt your orings, and wont clean the gun very much. Use paper towels to wipe off dirt and use any air-tool lubricant on the orings and prevent rust. Water will ruin electronics and may cause rust on certain parts.
NO, if you put it in the fuel it will ruin the car.
it is orings of a family's name
cause you have rubber orings that go on both ends of the injectors you probably need to replace them
Yes
remove the gas lines on both ends, be careful not to drop your copper orings unless you are installing a new one. then remove the two bolts that have it mounted to the block. and install the new fuel filter and your done.
Biodiesel most certainly does NOT ruin your engine. Most engine manufacturer in the world approves the use of biodiesel in their engines, unless of course your engine is not made to run on diesel fuel. Gasoline engines should not be ran on Biodiesel.Actually, if you don't change out your fuel pump, injectors, and fuel lines to accommodate the much thicker biodiesel fuel, it CAN ruin your engine.
Some truckers use the oil from an oil change as added fuel in the tank. In this case it will Not ruin your tank
It shouldn't ruin the properties of gasoline. However, it does ruin your parts if it runs through your engine. You need to have your fuel tank drained in order to remove the threat.
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With varying effects, the simple answer is yes.