Springs are rated by their pressure for a given amount of compression. The GM regulator can only adjust about 3/8". If compressed too far the spring will get coil bind and the pressure will spike to the full pump pressure.
DELUXE GM Throttle Body TBI Fuel Injector Rebuild Kit O-rings Gaskets Diaphragm
GM THROTTLE BODY TBI TWIN INJECTOR POD REPAIR REBUILD KIT WITH GASKETS
GM THROTTLE BODY TBI TWIN INJECTOR POD REPAIR REBUILD KIT INCLUDES GASKET SEALS
OEM GM Throttle Body TBI 1992-95 Chevrolet GMC S10 VAN 4.3L 17093047-46 17093121
1987-1996 GM Throttle Body TBI Fuel Injector V8 5.7L 5235206 OEM
GM Throttle Body (TBI) Regulator Spring (High Performance/Late 7.4l) 28-34psi
