LS 400 V8-4.0L (1UZ-FE) (1990)
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Fig. 12 Vacuum Pipe Removal. LS 400
Fig. 13 Vacuum Pipe Removal. SC 400
8.
Remove EGR pipe, then the fuel pressure VSV, Fig. 11.
9.
Remove EGR VSV, then EGR valve and modulator.
10.
On California models, remove EGR valve adapter.
11.
On all models, remove vacuum pipe, Figs. 12 and 13.
12.
Remove ISC valve, then the throttle body.
13.
Remove accelerator bracket, then the brake booster union.
14.
Remove air intake chamber as follows:
a. Disconnect cold start injector.
b. Remove union bolt and gaskets, then disconnect cold start injector from righthand delivery pipe.
c. Remove bolts and nuts to intake chamber, then remove intake chamber.
d. Remove cold start injector, tube, wire assembly and gasket.
15.
Disconnect engine wire from intake manifold.
16.
Disconnect engine wire from wire bracket on righthand cylinder head.
17.
Disconnect heater hoses.
18.
Remove delivery pipes and injectors as follows:
a. Disconnect water temperature sensor, cold start injector time switch and water temperature sender gauge connectors.
b. Disconnect connectors from wire bracket on front side of lefthand delivery pipe.
c. Remove six engine wire bolts, then the engine wire.
d. Disconnect injectors.
e. Disconnect fuel hose from fuel tube, then from fuel return pipe.
f.
Remove fuel return pipe.
g. Remove four nuts, wire bracket, two delivery pipes, eight injectors, four spacers and eight insulators. Do not drop injectors.
19.
Remove intake bolts, then the intake manifold.
20.
Remove front water bypass joint, then the rear water bypass joint.
21.
Remove front exhaust pipe, then the main catalytic converters.
22.
Remove righthand exhaust manifold.
23.
Remove oil dipstick and guide.
24.
Remove lefthand exhaust manifold.
25.
Remove engine hangers.
26.
Remove engine wire brackets from righthand head.
27.
Remove cylinder head covers.
28.
Remove semi-circular plugs, if necessary.
29.
Remove camshafts as follows:
