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look under truck and follow exhaust system from front towards rear the o2 sensor 2 is the sensor after he cat converter it looks like a tube with a wire connection mounted on top of exhaust pipe disconnect connection and unscrew sensor replace and reconnect
The problem sound like you have too much back pressure building up in the exhaust. Start by disconnecting the exhaust Y-pipe. Then start the engine and run again if the engine does not back fire, reconnect the exhaust everything after the Y-pipe. If the problem returns it is safe to say that the catalytic converters are clogged and need to be replaced.*** Make sure you use PB BLASTER or LIQUID WRENCH on the exhaust bolts to help with removal.***
If the out let or in let of the muffler is broken, the muffler will need to be replace. If it's not broken with u-clamps, most auto parts will have this.
Disconnect the negative battery cable from the left strut tower. The ground cable is equipped with a insulator grommet which should be placed on the stud to prevent the negative battery cable from accidentally grounding.
Remove the air cleaner resonator.
Remove the 3 bolts attaching the Transmission Control Module (TCM). Do not disconnect the TCM wiring. Move the TCM to gain access to the upper starter mounting bolt.
Remove the upper starter mounting bolt.
Raise and safely support the vehicle.
Remove the positive battery cable nut and disconnect the cable from the starter.
Disconnect the push-on solenoid connector.
Remove the lower mounting bolt that attaches the starter to the transaxle.
Remove the starter from the vehicle.
Fig. 3: Starter motor wiring terminal connections — 2.0L SOHC engine with A/T; 2.4L engine
To install:
Install the starter onto the transaxle and the lower mounting bolt.
Tighten the mounting bolts to 40 ft. lbs. (54 Nm).
NOTE: Before reconnecting the wiring to the starter solenoid, be sure to clean the wiring of any dirt or corrosion.
Reconnect the positive battery cable to the solenoid post and tighten the retaining nut to 90 inch lbs. (10 Nm).
Reconnect the push-on solenoid connector.
Lower the vehicle.
Reinstall the upper attaching bolt and torque to 40 ft. lbs. (54 Nm).
Reinstall the TCM to its original location and install the mounting screws.
Most vehicles will require the removal of the front exhaust pipe. Use penetrating oil on the fasteners to ease removal.
Disconnect the starter motor electrical connections.
Remove the starter motor mounting bolts and remove the starter.
Fig. 4: Exploded view of the starter motor mounting — 2.5L engine
To install:
Clean both surfaces of the starter motor flange and the rear plate. This is important since the starter grounds through its case and the transaxle flange to which it attached. Some remanufactured starters may have paint on these areas which should be cleaned off before installation. Install the starter motor onto the transaxle and secure with the retaining bolts. Tighten the bolts to 20–25 ft. lbs. (26–33 Nm).
Connect the electrical harness connectors to the starter.
Connect the negative battery cable and check the starter for proper operation.
Disconnect the negative battery cable from the left strut tower. The ground cable is equipped with an insulator grommet which should be placed on the stud to prevent the negative battery cable from accidentally grounding.
Raise and safely support the vehicle.
Loosen, but do not remove, the exhaust pipe-to-manifold retaining nuts.
Place a drain pan under the oil filter to prevent oil spillage, then remove the oil filter. For additional details, refer to Section 1.
Fig. 5: Loosen the exhaust pipe-to-manifold retaining nuts to provide removal clearance for the starter
Fig. 6: Location of the positive battery cable nut (1) and the push-on solenoid connector (2)
Fig. 7: After removing the oil filter for access, unfasten the retaining nut and disconnect the positive battery cable
Fig. 8: Disengage the push-on starter solenoid connector
Remove the positive battery cable retaining nut and battery cable from the starter.
Disconnect the push-on solenoid connector.
Remove the 3 bolts that attach the starter unit to the transaxle.
Pull the exhaust pipe down just enough to provide clearance for the starter motor. The exhaust pipe does not have to be separated from the pipe-to-manifold threaded studs.
Remove the starter unit from the vehicle.
Fig. 9: Remove the 3 starter motor-to-transaxle housing attaching bolts
Fig. 10: Pull the exhaust pipe down just enough to provide removal clearance for the starter
Fig. 11: Carefully remove the starter motor from the vehicle
To install:
Install the starter unit onto the transaxle and install the 3 mounting bolts.
Tighten the mounting bolts to 40 ft. lbs. (54 Nm).
NOTE: Before reconnecting any wiring to the starter solenoid, clean the wire terminals of any dirt or corrosion.
Reconnect the positive battery terminal and retaining nut to the starter solenoid post. Tighten the retaining nut to 90 inch lbs. (10 Nm).
Hi that harness it's located in the trunk where the CD changer sits. You need to disconnect the changer if you want to use the ipod adapter. i hope this information was helpful.
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