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The temperature when taking the measurements was ~75° (car stays in garage).
The CSV is certainly one of the suspects. I jumped the starter over the weekend (to see if maybe the ignition solenoid was going bad). In the process of wiring up the remote starter, I disconnected, and forgot to reattach the wire going to the CSV. The car started like it has been i.e. several cranks to low idle. In other words, no apparent difference with CSV unplugged. Was going to try opening the throttle and peering down with a mirror while cranking to see if it's working... Honestly though, I'm doubtful this is the issue... but worth checking.
Would a clogged WUR still give fuel pressures in spec?
I noticed that when I remove the oil cap, you 'hear' the engine drop in revs, but the tach shows barely a drop (maybe ~50-100 rpm drop). So I'm starting to lean towards a vacuum leak.
Residual pressure checks fine i.e. 10min = 1.5bar, 30min = 1.1bar... A bit on the low side, but still in spec based on Bentley manual. Plus, never had a warm start issue.
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