KNOCK SENSOR (KS)
Note. DO NOT apply thread sealant to sensor threads. Sensor is coated at factory and applying additional sealant will affect sensor's ability to detect detonation.
FUEL SYSTEM
| WARNING | Always relieve fuel pressure before disconnecting any fuel injection-related component. DO NOT allow fuel to contact electrical parts while testing fuel system components. |
FUEL SYSTEM PRESSURE RELEASE
- Loosen fuel filler cap to relieve tank pressure. Remove fuel pump relay. See «FUEL PUMP RELAY LOCATION»(ref-16342-S10506693572000122900000) .
- Start engine and allow it to run until it stalls. Loosen hose clamp of fuel line on side of pressure regulator coming from fuel line inlet distributor pipe.
- Cover fuel hose using a shop towel. Slowly pull hose from pressure regulator to relieve fuel pressure. When fuel stops leaking, reinstall hose and clamp. FUEL PUMP RELAY LOCATION Model Location Trooper SLX In Right Fenderwell Relay Box
FUEL RAIL & FUEL INJECTORS
| CAUTION | To prevent damage to fuel injectors retaining bracket and/or fuel injectors, DO NOT try to remove fuel injectors by lifting up fuel injector retaining bracket while fuel injectors are still installed in bracket slots. DO NOT attempt to remove bracket without first removing fuel pressure regulator. |
| WARNING | To reduce risk of fire, verify lower (small) "O" ring of each injector does not remain in lower manifold. If "O" ring is not removed with injector, replacement injector, with NEW "O" rings, will not seat properly in injector socket and could cause a fuel leak. |
Note. Each injector is calibrated for a specific flow rate. When replacing fuel injectors, order replacements with identical part number as old injectors.
Scheme 1
Scheme 1: Removal & Installation
- Relieve fuel pressure. See «FUEL SYSTEM PRESSURE RELEASE»(ref-16342-S25600740822000122900000). Disconnect negative battery cable. Remove upper intake manifold. See «UPPER INTAKE MANIFOLD»(ref-16342-S08451671822000122900000). Disconnect fuel lines. Disconnect fuel injector electrical connectors. Remove fuel line bracket from lower intake manifold.
- Remove fuel rail bolts. Remove fuel rail. Remove injector retainer clip. Remove fuel injector assembly. Remove "O" rings from injector. (Scheme 1)
- To install, reverse disassembly procedures. Install NEW "O" rings on injector and lube with engine oil. Install injector into fuel rail using NEW retainer clips. Coat end of injector with engine oil. Install fuel rail. Install upper intake manifold. Tighten bolts and nuts to specification. See «TORQUE SPECIFICATIONS»(ref-16342-S21625244962000122900000).
Adjusting Cable At Throttle Body
- Loosen adjusting and jam nuts. Pull on cable while fully closing throttle valve. Tighten adjusting and jam nuts.
- Loosen adjusting nut by 3 turns and tighten jam nut again. Valve lever must return up to stopper screw. If valve lever does not reach stopper screw, repeat adjustment procedure.
