What you are probably looking at are not regulators, but the fuel rack that directs fuel to the injectors. You can turn the key on (without actually starting the car) and then pull the fuel line carefully from the driver side fuel rack at the end near the firewall. If you have fuel there, do the same for the fuel line leaving the rack near the front end of the engine. This should tell you if you are delivering fuel from the pump to the injectors.

__________________
Gary


1973 450SL
1999 Silverado 4X4 Ext Cab
1999 Mercury Sable
1972 450SL Parts car

Previously owned keepers:
1967 MGCGT - 3L-6
1972 Mustang Fastback - 351C

Current Cylinder Index: 37