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PeteKz PeteKz is online now
PCA Member since 1988
 
Join Date: Feb 2018
Location: SW Washington State
Posts: 4,625
Garage
The SP valve controls the pressure from the fuel pump to the return lines. The only way the fuel pump's pressure could affect the SP is if its output was too low.

Speaking of which, do a fuel delivery test. The spec is 1000ml (1 liter) in 30 seconds. If it passes, then the SP is out of adjustment.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners.

Cars are for driving. If you want art, get something you can hang on the wall!
Old 07-22-2025, 10:16 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #151 (permalink)