The fuel-injection system in a Toyota truck requires a specific fuel pressure at all times or else the engine will not run correctly. If your Toyota's idle is dropping or you think you have a fuel-pressure issue, the fuel-pressure regulator or fuel pump could be to blame. To find out if it is a fuel-pressure problem, check the pressure to find out if it matches specifications.
Things You'll Need
- Fuel-pressure testing kit
Locate the fuel supply line on the passenger side of the engine compartment. Remove the quick disconnect fitting on the supply line by hand.
Insert the t-fitting from the fuel-pressure testing kit into the fuel-supply line on one side, and the fuel-injection rail on the other. Connect the bottom of the t fitting to the fuel-pressure gauge.
Start the Toyota. Let the truck run and idle normally. Read the number on the gauge. If it reads between 40.8 and 41.7 psi, then your fuel pressure is correct. If it doesn't, then the fuel pressure regulator or fuel pump may be defective, and you need to do further testing to find out.
Tips & Warnings
- Never smoke or have an open flame nearby while you're working on the fuel system of a vehicle. If you do, you risk causing a fire and damaging yourself and the vehicle.
- "Chilton Toyota Tacoma 2005-09 Repair Manual"; Joe L Hamilton; 2009
How to Test Fuel Pressure On Your Car
Your car is running poorly or not at all, I will show you how to test your fuel pressure to determine if...
How to Check Air Pressure in a Tire in a Toyota Tacoma
Taking care of your tires improves handling and that all-important gas mileage. Toyota provides the information you need to know to maintain...
How to Replace a Fuel Filter in a Toyota Tacoma
The fuel filter in your Toyota Tacoma prevents dirt and sediment from entering the fuel system. Keeping the fuel system clean is...
How to Replace a Fuel Pump on a Toyota T-100
Toyota trucks use electric fuel pumps rather than mechanical fuel pumps. Replacing the fuel pump in the Toyota T-100 require completely removing...
How to Test the Fuel Pressure in My 1992 Camry
The 1992 Toyota Camry was either available with a 2.2L four-cylinder engine, or a 3.0L V6. The process of checking the car's...
How to Test Fuel Pressure on Your Car
It's difficult to test fuel pressure on a car without an expensive master fuel injection pressure testing kit. Take a car with...