1983 Rolls Royce Silver Spur fuel injectors

when i sart the car, it runs for 3 or 4 seconds and
then it shuts down. it does this 5 or 6 times and
then it runs ok.
i have a fuel pressure guage but it don't know how
to hook it up.
ithink that i have a kj or something like that.
i can't tell where the fuel come into the injector pump

can you help??????

thank you

bill