Preliminary Checks
Most driveability problems in the Chrysler multi-point EFI system result from faulty or poor wiring, or loose and/or leaking hose connections. To avoid unnecessary component testing, a visual check should be performed before beginning trouble shooting procedures to help spot these common faults. A preliminary visual check should include:
- Air ducts to air cleaner, from the air cleaner to turbocharger and from turbocharger to throttle body.
- All component electrical connections must be clean, tight and unbroken.
Check vacuum lines for secure, leak-free connections in these areas:
- Throttle body.
- EGR and purge solenoids (located on a common bracket at right rear corner of engine compartment).
- Vapor canister.
- PCV valve to turbocharger vacuum port.
- Back pressure transducer.
- MAP sensor.
Ensure that the following electrical connectors are securely attached:
- 25-way connectors (2) at logic module.
- 3-way connector at MAP sensor.
- 3-way and 1-way connectors at ASD relay.
- 12-way and 10-way connectors at power module.
- 4-way connector at EGR and purge solenoids.
- 2-way connector at speed sensor (located in line with speedometer cable).
- 2-way connector at charge temperature sensor.
- 6-way connector at throttle body.
- 2-way connector at each fuel injector.
- O2 sensor connector.
- 2-way connector at coolant temperature sensor.
- 3-way connector at distributor.
- 1-way connector at knock sensor (located at rear of valve cover).
- Harness ground eyelet mounting to intake manifold.