While pouring fuel into the throttle body might get it to start momentarily if the problem is solely fuel delivery, it's a dangerous and unreliable method. It's also not a solution, as it doesn't address the underlying issue. Doing this can cause serious damage, such as hydrolock (liquid fuel entering the cylinders).
Here's what you should do instead of resorting to pouring fuel into the throttle body:
1. Verify the Fuel Pressure Gauge: Ensure your gauge is accurate. A faulty gauge will give incorrect readings.
2. Check Fuel Pump Relay and Fuse: A bad relay or blown fuse will prevent the fuel pump from operating. Locate these components in your owner's manual or online and check for damage or a lack of continuity.
3. Fuel Pump Test: This is crucial. Have the fuel pressure tested using a mechanical gauge connected directly to the fuel rail (more accurate than an in-tank gauge). This will confirm whether the pump is delivering sufficient pressure. If the pressure is still low, the fuel pump itself might be weak or failing.
4. Fuel Filter: A clogged fuel filter restricts fuel flow and reduces pressure. It's a relatively cheap and easy part to replace.
5. Fuel Pressure Regulator: This regulator maintains fuel pressure within the system. A faulty regulator can cause low fuel pressure.
6. Other potential issues: While less likely, other factors could contribute to low fuel pressure including leaks in the fuel lines, a faulty fuel injector, or problems with the PCM (Powertrain Control Module).
In summary: 38 PSI is likely too low. Don't pour fuel into the throttle body. Instead, systematically check the fuel system components for any malfunction. Professional diagnostics might be needed if you can't pinpoint the cause. A mechanic with experience in fuel systems can properly test and repair the problem safely and efficiently.
