Finding cause of loss of rest pressure
I had a local owner come over to my place so I could help him with his car. He has a hot start problem so I put the pressure gauge on his engine and sure enough it looses rest pressure in about 10 minuets. He said his dad replaced the fuel accumulator so I pulled the PPR to replace that small O-ring. The old one looked good and replacing the o-ring did not change rest pressure time. Pulled the cover over the fuel pump thinking the check valve was bad. He has the new DMCH pump and it has the check valve in the correct line. So I'm thinking the accumulator is bad or the injectors leak. I did do a minor mixture adjustment so that setting was not far off and it did not change rest pressure. I sold him my hot start relay but expect him to return someday so I can test the injectors (It's to cold today and getting late).
Anyway. This engine is very strange. The idle motor is some horizontal unit from some other car. The throttle cable reel is from some other car also. There is no ignition advance solenoid. I'm guessing these changes are all some previous owners modifications or the engine was pulled from a Volvo. Owner said car was bought from Albuquerque New Mexico.