User: How can I replace my fuel pump?
Assistant: To replace the fuel pump on a fourth-generation Toyota Celica (ST160, ST162, or ST165), you generally need to drop the fuel tank to access the pump because the pump is located inside the tank and is not accessible from inside the car under the seats.
Here is a detailed overview of the procedure based on the common practice shared by owners of these models:
1. **Preparation:**
– Drive the car until the fuel tank is nearly empty or use the fuel pump to pump out excess gasoline. Having less fuel makes handling the tank easier and safer.
– Disconnect the battery to prevent sparks.
– Have a fire extinguisher ready for safety.
2. **Accessing the Tank:**
– Lift the rear of the car using jack stands or ramps to provide enough clearance for the tank removal.
– Remove the fuel filler/inner arch guard.
– Disconnect the fuel filler hose, vent hoses, and fuel lines. Be ready to catch fuel drips.
– Unbolt the straps that hold the fuel tank in place, usually with 14mm bolts.
– Carefully lower the tank using a jack or a suitable support.
3. **Removing the Fuel Pump:**
– Once the tank is lowered, clean the area around the fuel pump assembly to avoid debris falling into the tank.
– Remove the securing bolts or screws of the pump access panel on the top of the tank.
– Carefully take out the fuel pump assembly.
– Disconnect the wiring and hoses from the pump.
– Replace the old fuel pump with the new one. It is common to upgrade to a Walbro high flow pump, but OEM replacements or those from Toyota Supra models are also options.
4. **Reinstallation:**
– Clean and inspect the pump bracket and wiring to ensure solid connections and prevent corrosion.
– Install the new pump and secure the assembly back onto the tank.
– Lift the tank back into position and secure it with the straps.
– Reconnect all hoses and electrical connectors.
– Reinstall any guards or covers removed.
5. **Testing:**
– Reconnect the battery.
– Turn the ignition to the ON position to prime the fuel pump and check for any leaks.
– Start the engine and verify proper fuel pressure and pump operation.
Note that some owners mentioned a potential alternative to dropping the tank is cutting a hole in the trunk floor to access the pump, but this is generally not preferred due to the difficulty of sealing the hole afterward.
Regarding specific tips:
– Using appropriate wire gauges and corrosion-resistant connections is important if the wiring needs repair.
– There is a drain plug at the bottom of the tank on some models that can help remove fuel to make the tank lighter.
– A line (flare) wrench is recommended for handling fuel line nuts.
– Always replace any crushed washers or seals to avoid leaks.
– Some owners find pumps from models like the Supra can be a direct replacement and provide better flow.
The entire job, done by yourself, may take several hours depending on tools and experience.
To summarize, the key is to drop the fuel tank, remove the pump assembly, replace the fuel pump, then reassemble everything back carefully. This process is the same for ST160, ST162, and ST165 models.
If you want, I can help you with more specific hardware or wiring details based on your particular Celica model.
References from forum users who have done this replacement and detailed descriptions confirm this approach as the standard for these Celica generations【4:1】【4:3】【6:13】【10:7】【13:5】.