My car doesn't want to start from cold. I pressure tested one side, so far, and the results are a follows: Primary pressure = 5.5 bar Cold WUR pressure = 0.6 bar. Ambient temp was 39 deg F. Warm WUR pressure = 2.8 bar. Producing vacuum in the small hose, coming from the base of the WUR rose the pressure to 3.5 bar. Vacuum in the larger hose, coming off the top of the WUR lowered the pressure. Turning the pump off, from primary pressure = 3.2 and steady for 10+ minutes. Is the cold WUR pressure too low? Would this cause a cold non-start? Any thoughts? Thanks