by gt350fme » Wed Aug 31, 2022 7:12 pm
If with the ignition on, jumper connected, and fuel pump runs it’s the oil pressure fuel switch or no oil pressure, if no fuel pump runs with the jumper on the oil pressure fuel switch plug “ o.p.f.s”, check voltage at jumper with ignition on, yes or no voltage? if yes either the fuel pump is bad or wiring to it is bad, if no voltage on jumper, problem is before o.p.f.s, such as a fuse or ignition switch or some other wire connection issue.
Hope this helps, always curious to know what the fix was, let us know.
Good luck
1964 Chevy panel K30
1973 GT Vega Hatchback
1977 Chevy K20
1984 944 porsche
1992 Lexus SC 400