So on my 79 s130, I've always had problems with the idle, fluctuated and died. Today I decided to start pulling vacuum lines to check for suction. The first one I pulled was to the Fuel Pressure Regulator and now the car runs better than it ever has. This leaves me guessing that the FPR is clogged somehow, but why would it run even better without the vacuum? I am very confused and would appreciate any wisdom you wish to share.
PS if you tell me to search.....been there done that
Thanks,
Chuck