Engine Controls and Fuel - 3.6L - Introduction: Specifications Cadillac STS I facelift

Testing & Diagnostics 17 illustrations

Ignition System Specifications

Application	Specification
Application	Metric	English
Firing Order	1-2-3-4-5-6
Spark Plug Gap (non-adjustable)	1.10 mm	0.044 in
Spark Plug Torque	20 N.m	15 lb ft
Spark Plug Type	AC 41-990

Fastener Tightening Specifications

Application	Specification
Application	Metric	English
Accelerator Pedal Position (APP) Sensor Mounting Nut	9 N.m	80 lb in
Air Cleaner Bolt	9 N.m	80 lb in
Air Cleaner Cover Screw	8 N.m	71 lb in
Air Cleaner Duct Clamps	4 N.m	35 lb in
Barometric Pressure Sensor Bolt	10 N.m	89 lb in
Camshaft Position Actuator Solenoid Valve	10 N.m	89 lb in
Camshaft Position (CMP) Sensor Bolt	10 N.m	89 lb in
Crankshaft Position (CKP) Sensor Bolt	10 N.m	89 lb in
Engine Coolant Temperature (ECT) Sensor	22 N.m	16 lb ft
Evaporative Emission (EVAP) Canister Nut	6 N.m	53 lb in
Fuel Feed Pipe Bolt	50 N.m	28 lb ft
Fuel Filler Tube Bolt	3.5 N.m	31 lb in
Fuel Filler Tube Brace Bolt	9 N.m	80 lb in
Fuel Filler Tube Hose Clamp	3.5 N.m	31 lb in
Fuel Filter Bracket Bolt	9 N.m	80 lb in
Fuel Filter Outlet Fitting	30 N.m	22 lb ft
Fuel Pressure Sensor	33 N.m	28 lb ft
Fuel Pump Bolt - High Pressure LLT	15 N.m	11 lb ft
Fuel Rail Bolt (LY7)	10 N.m	89 lb in
Fuel Rail Bolts (LLT)
First Pass	12 N.m	106 lb in
Final Pass	23 N.m	17 lb ft
Fuel Pipe Shield to Cylinder Head Bolt	10 N.m	89 lb in
Fuel Pipe Shield to Intake Manifold Bolt	23 N.m	17 lb ft
Fuel Rail Crossover Tube Fittings
First Pass	16 N.m	12 lb ft
Final Pass	32 N.m	24 lb ft
Fuel Pump Bolts	15 N.m	11 lb ft
Fuel Tank Strap Bolt	50 N.m	37 lb ft
Heated Oxygen Sensor (HO2S)	40 N.m	30 lb ft
Ignition Coil Bolt	10 N.m	89 lb in
Intake Manifold Runner Control Solenoid Bolt	10 N.m	89 lb in
Intermediate Fuel Pipe Fitting
First Pass	16 N.m	12 lb ft
Final Pass	32 N.m	24 lb ft
Knock Sensor Bolt	23 N.m	17 lb ft
MAF Sensor Screw	3 N.m	27 lb in
Manifold Absolute Pressure (MAP) Sensor Bolt	10 N.m	89 lb in
Rear Frame Bolt	200 N.m	148 lb ft
Shock Bolt - Lower	90 N.m	66 lb ft
Spark Plug	20 N.m	15 lb ft
Throttle Body Bolt	10 N.m	89 lb in

Scheme 1

Scheme 1: Emission Hose Routing Diagram (w/LLT)

Callout	Component Name
1	Positive Crankcase Ventilation (PCV) Hose
2	Upper Intake Manifold Plenum
3	Fresh Air Breather Hose
4	Throttle Body Assembly
5	Evaporative Emissions (EVAP) Canister Purge Solenoid Vacuum Supply Hose
6	Evaporative Emissions (EVAP) Canister Purge Solenoid

Scheme 2

Scheme 2: Evaporative Emissions Hose Routing Diagram

Callout	Component Name
1	EVAP Service Port Connection - if equipped
2	Fuel Filler Pipe Vapor Recirculation Hose
3	Fuel Tank Pressure (FTP) Sensor
4	EVAP Purge Canister
5	EVAP Vent Valve
6	Fill Limit Vent Valve (FLVV)
7	Fuel Tank Vent/Rollover Valve
8	EVAP Purge Solenoid

Scheme 3

Scheme 3: Fuel Hose/Pipes Routing Diagram (w/LLT)

Callout	Component Name
1	Secondary Fuel Sender Assembly - Left
2	Primary Fuel Sender Assembly - Right
3	Fuel Feed Hose
4	Fuel Feed Pipe
5	Fuel Pressure Test Connection
6	Fuel Pulse Dampener
7	High Pressure Fuel Pump
8	Fuel Rail
9	Fuel Rail Pressure Sensor
10	Fuel Injector
11	Fuel Filter - if equipped
12	Fuel Return Hose - if equipped
13	Fuel Filler Tube
14	Fill Limit Vent Valve (FLVV)
15	Fuel Tank