Cranking Test
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
- Turn the ignition off.
- Remove the engine cover.NOTE: DO NOT remove the return fuel line clips retaining the return line to the injector. Push IN on the clip to release the hose and then again to install the test vials.
- Disconnect the return fuel hose at the top of each of the injectors.NOTE: Care must be taken not to damage the return line check valve between cylinder number four injector and the fuel rail.
- Block off the disconnected return fuel hose before the fuel return junction on the left rear of the cylinder head cover. See Figure.
- Disconnect the camshaft position sensor (CMP).NOTE: Attach special tool adaptor #9686 to the #4 injector and fill with clean diesel fuel to purge the air from the adaptor, then install the test vial onto the adaptor.
- Install the test vials onto the injectors and secure with the return hose clips. See Figure.
- Crank the engine for ten seconds while monitoring each inner test vial.
- Evaluate the individual return quantities.
The maximum permissible difference between the return quantity of the individual injectors and the injector with the highest return quantity is 3 graduation marks in the small vial.
Injector Graduated Vial Mark Content 1 4 marks, small vial 4 ml 2 1 mark, small vial 1 ml 3 1 mark, small vial 1 ml 4 1/2 mark, small vial 0.5 ml Evaluation
Injector #1 has excessive fuel return quantity, replace the injector. Injectors #2, #3, #4 are OK.
- Perform the cranking test after the repair to assure no other injectors are identified.