Engine Cranks But Does Not Run

DESCRIPTION
The Engine Cranks but Does Not Run diagnostic table is an organized approach to identifying a condition that prevents an engine from starting. The Engine Cranks but Does Not Run diagnostic table directs the service technician to the appropriate system diagnosis.

The Engine Cranks but Does Not Run diagnostic table assumes the following:
^ The battery is completely charged.
^ The engine cranking speed is within specifications.
^ There is adequate fuel in the fuel tank.

DIAGNOSTIC AIDS
Inspect for the following conditions:
^ Mass air flow (MAF) is compared to a calculated MAF based upon the manifold absolute pressure (MAP), throttle position (TP), and engine RPM readings. A skewed or unresponsive MAP sensor at KEY ON will cause the predicted air flow value to be inaccurate. Compare MAP and TP sensor value to that of a known good vehicle.
^ Faulty engine coolant temperature (ECT) sensor. Using a scan tool, compare ECT with intake air temperature (IAT) on a completely cool engine. The ECT should be within 3°C (5°F) of the IAT. If not, Refer to DTC P0128. P0128

For an intermittent condition, refer to Intermittent Conditions. Intermittent Conditions

TEST DESCRIPTION

Steps 1-6:

Steps 7-12:

The number below refers to the step number on the diagnostic table.
8. This step determines if the camshaft position (CMP) sensor is functioning properly.