Table A-3 Engine Cranks But Does Not Run

Table A-3 Engine Cranks But Will Not Run (1 Of 3):

Table A-3 Engine Cranks But Will Not Run (2 Of 3):

Table A-3 Engine Cranks But Will Not Run (3 Of 3):

Engine Cranks But Will Not Run:

CIRCUIT DESCRIPTION


Before using this table, battery condition, engine cranking speed, and fuel quantity should be checked and verified as being OK.


DIAGNOSTIC AIDS

- Water or foreign material can cause a no start during freezing weather. The engine may start after 5 or 6 minutes in a heated shop. The malfunction may not recur until an overnight park in freezing temperatures.

- Fuel Pressure: Low fuel pressure can result in a very lean air/fuel ratio.

- Fouled or damaged spark plugs will cause a "Engine Cranks But Will Not Run" condition.

- With no Malfunction Indicator Lamp (MIL) and the engine cranks but will not run, check for a faulty Main Relay.

- Check for a faulty IG coil meter fuse.

- A short to ground in the BRN/WHT wire between the noise suppressor filter and the distributor could cause a no start condition, also check the resistance of the noise suppressor filter.

An intermittent malfunction, may be caused by a poor connection, rubbed through wire insulation, or a wire broken inside the insulation. Inspect harness connectors for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals and poor terminal-to-wire connections before component replacement.


TEST DESCRIPTION

Number(s) below refer to the step number(s) on the Diagnostic Table.

1. The Engine OBD System Check prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.

2. Checks for spark at the spark plugs.

4. Checks for faulty Ignition wires.

7. Checks the power and ground circuits to the distributor.

8. Checks the power and ground circuits to the distributor. If the Ignition feed circuit is found not to have the proper voltage, check the Main relay, other symptoms should be noticed.

9. Checks the primary circuit of the Ignition Coil which is located in the distributor.

10. Checks the secondary circuit of the Ignition Coil which is located in the distributor.

12. Checks for a toggling voltage from the Ignition Control Module (Igniter) which is located inside the distributor.