* Complexity and Cost: Routing the fuel lines, finding a suitable location for the pump, and ensuring proper priming and pressure regulation will add significant complexity and cost compared to simply replacing the in-tank pump. You'll need additional fittings, hoses, possibly a fuel pressure regulator, and potentially a new fuel filter setup.
* Safety Concerns: Working with fuel lines and pumps involves potential fire hazards. Improper installation can lead to leaks and create a serious risk.
* Reduced Convenience: An external pump typically means less convenient access for future maintenance or replacement.
* Potential Performance Issues: Getting the right fuel pressure and volume can be challenging, and improper setup could negatively impact engine performance.
When might it be considered?
The only real scenarios where an external pump might be considered are:
* Severe In-Tank Pump Damage: If the in-tank pump is beyond repair and you can't easily source a replacement, an external pump might be a last resort.
* High-Performance Modifications: If you're significantly modifying the engine and require a higher-volume or higher-pressure fuel system than the stock in-tank pump can provide, an external pump might be necessary. This often involves significant fuel system upgrades beyond just the pump.
In almost all cases, replacing the in-tank pump with a new in-tank pump is the far better option. It's easier, safer, more reliable, and less expensive. Only proceed with an external pump after careful consideration and if you have the necessary mechanical expertise and safety precautions in place. You'll likely want to consult a qualified mechanic even then.
