Porsche 928 Workshop Manual page 435

928
Fuel Mixture
25
TESTING AND ADJUSTING SPECIFICATIONS FOR K-JETRONIC
(1981/1982/1983 Models) 928 S
Engine M 28.11 and M 28.12
Test Point
Electric fuel pump
Delivery rate with
1 fuel pump
I
t
Control pressure "cold"
(equal to ambient temperature)
Control pressure "warm"
Test with atmospheric
pressure (without vacuun
i 1) ,
: I
Connect vacuum pump u
test on intake connection
of warm-up regulator.
With test pressure 460
600 mbar (350 450 mm
I
Hg,l
-L
Specification
at least 1120 cc/30 sec.
Diagram for warm-up regulator
Part No. 928.606.109.04
Bosch No. 0438.140.086
With test vacuum 450 550 mbar
(340 - 420 mmHgl
2.8 3.2 bar
3,4 3.8 bar
Special
Instructions
a
Printed in Germany . vll, ,983
Testing and Adjusting Specifications 25-69