Hello All, today my dad and i checked for blockage in the fuel lines. we did as a couple of list guys suggested - we took my return fuel line and put it in a 2 liter container and jumped the RPM relay - in one minute it was right on, pretty much, 2 liters of gasoline in the container. which then rules out the possibility of blockage in the lines, correct? this would imply that the gasoline is circulating freely without restriction from the fuel pump all the way back to the fuel tank. to recap: 1. very difficult starting - engine is flooding immediately. black smoke from exhaust pipes indicating way too much fuel at the injectors. 2. very high fuel pressure - over 100 PSI, closer to 130 i would say. the pressure was measured from the bolt which holds the hose that goes from the fuel distributor to the cold start valve. the reading was taken at this bolt. 3. high fuel pressure to does not appear to be a result of blockage, due to the results of the above test. 4. this appeared OVERNIGHT - it is very difficult to believe that i need shims in my primary pressure regulator or something that adjusts pressure due to cumulative wear and tear. the answer seems like it must be something much more simple because the car ran PERFECTLY the night before and every time before that, and then the next morning i came out and the car wouldn't start. 5. had a broken fuel line near the accumulator. was possibly a little leaky beforehand, and then the high pressure caused the hose to burst. we assume this was return line from the accumultor and was a result of the problem and not the cause. therefore, we can conclude that the high pressure is a result of either a failed primary pressure regulator or a failed control pressure regulator. however, this is confusing. the control pressure regulator cannot raise fuel pressure beyond what the primary pressure regulator presets it to. for instance, if the primary pressure regulator only allows up to 80 PSI of fuel pressure, then the control pressure regulator cannot make the fuel pressure to be 100 PSI - it can only lower it, correct? if so, that would imply that the primary pressure regulator is at fault. but there are no movable parts and cannot be adjusted, correct? is it possible that this valve simply broke and now it is failing to restrict my fuel pressure at all? could this have happened 'overnight'? if so, how can test the primary pressure regulator for this type of failure? i would like someone to explain to me how to actually get to it in the fuel distributor and what i should look for if it is at fault. additionally, is there anything else i should be checking in my fuel system? i think we've got it narrowed down pretty well but i'm not expert so ANY thoughts or help is greatly appreciated. thanks as always, Andy Soma576@xxxx 1982 DeLorean DMC-12 VIN#11596 Fargo, ND 58102 [Non-text portions of this message have been removed]