* Carbureted: If it's a carbureted engine, fuel pressure is regulated by the carburetor itself and is typically around 5-7 PSI.
* Throttle Body Injection (TBI): TBI systems in that era usually run around 10-15 PSI.
* Multi-Port Injection (MPI): MPI systems would have a higher pressure, typically in the range of 30-45 PSI, but this can vary depending on the specific system and manufacturer.
To find the exact fuel pressure specification for your specific 1992 454 Chevy engine, you need to:
1. Check your owner's manual: This is the best source of information.
2. Look for a sticker under the hood: Some vehicles have stickers with specifications, including fuel pressure.
3. Consult a repair manual: A Haynes or Chilton manual for your specific year and model will have this information.
4. Contact a Chevrolet specialist or mechanic: They can provide the correct specification based on your engine's identification number (VIN).
Without knowing the specific fuel system on your 1992 454, providing a precise fuel pressure is impossible. Guessing could lead to engine damage. Always refer to the correct documentation for your engine.