Intake Air System, Component Layout

Intake air, component layout






1 - Intake manifold
2 - Harness connector
for pressure switch
3 - Support bracket
between intake and exhaust manifolds
4 - Throttle valve housing
basic throttle adjustment, Testing and Inspection
5 - Vacuum hose
- to Digifant control unit
- critical length of 1 meter; do not lengthen or shorten
6 - Vacuum hose
- to carbon canister control valve
- vacuum hose layout and connections
7 - 15 Nm (11 ft lb)
8 - 25 Nm (18 ft lb)
9 - Intake manifold support
between bypass valve housing and cylinder head
10 - Socket head bolt
20 Nm (15 ft lb)
11 - 10 Nm (7ft lb)
12 - Locking clip
13 - 0-ring
14 - Tamper proof plug
- for CO adjustment screw
- remove to adjust CO
- idle speed adjustment, Testing and Inspection
15 - Potentiometer
- for 49 States and Canada starting model year 1990
- for California model year 1990 only
- measure potentiometer resistance between terminals 1 and 3
- must be between 0 and 2000 Ohms

NOTE: Resistance changes during idle speed adjustment.

16 - Connecting hose
for intercooler
17 - Bypass tube
between bypass housing and G-charger
18 - Hose
to multi-function indicator and AC
19 - Hose
to fuel rail
20 - Pressure switch
- for fuel pump after-run
- checking, Testing and Inspection
21 - Connector tee
22 - Mounting brackets
- for idle stabilizer valve
- mounting must be free of stress
23 - Hose
24 - Idle stabilizer valve
idle speed stabilization checking, Testing and Inspection
25 - Support tab
26 - Thermo-switch
for fan after-run
27 - Gasket
between intake manifold and cylinder head