[F1LOCO]

Recent long start issues (hot/cold - doesn't really matter. Takes 2-3 longer cranks to get it fire right and then just a blip of the gas to stabilize it). Used to be able to barely make contact with key and it would fire strong and instantly). Now it will fire (when I get it fire) and instantly go to 1500 for a second or two, then drops to 900'ish pretty instantly. Electrical all updated - CDI (Ashlock), Bosch Cap/rotor, Clewett Wires and NGK plugs.

Fuel Pressure Gauges finally came in. I currently have a BOSCH 086 WUR with VAC port. From I can find this is for a 928 possibly? Hooked my gauges up, pumped VAC going in to 15 in/HG or 400mm/HG (at least SPEC in the shop manual for a '78) and got the following:

System Pressure valve closed 4.7 Spec 4.5-5.2
Cold Pressure valve open .85 Spec 1.7-2.1 (56F/13.3C)
Warm Pressure stabilized around 7' mark at 3.7 (spec 3.2-3.6)
Residual Pressures at 0 = 2.6; 10' = 1.4 (spec 1.3) and 20' = 1.3 (spec 1.1)

The specs I am pulling are from OE Porsche Shop Manual.

Any clues?
Seems like the two major off's are the Cold Pressure reading and higher residual pressure at 20'.

On a side note of discovery I noticed a bit of arching going on in the cap. Doubled checked all the wire connections, cleaned it up and after 40 miles, more arching on cap contacts and middle of rotor slightly black as well. Plugs looked good, though too new to really tell any signs. Timed at BTDC at 5 at 950 rpms (VAC disconnected) and pulling 25 now at 58000 RPMs with VAC disconnected. On a couple of hot kills, advanced mark on plug strap is about where it should be, just before the bend, and may even be on the low side a tad. The only thing I noticed today in running the pressures, the VAC would drop to 2-3 in/Hg every 2 minutes on the warm read outs. I would bump it back to 15, and would end up at 13 at end of two min runs all the way through 10 minutes. At idle, I am getting 15 in/Hg of VAC on the line going into the WUR at idle.

Thanks for any direction. Not sure if WUR is toast, just wrong one, or something else. Had been starting fine, though, since I got it a couple of years ago.