Chart A-3 Engine Cranks But Will Not Run

Fig. 041 - Wiring Diagram for Chart A-3 Engine Cranks But Will Not Run. VIN L:

CHART A-3

ENGINE CRANKS BUT WON'T RUN

3.0L "N" SERIES

FUEL INJECTION (PORT)

Engine cranks but won't run, (or Engine may start, but immediately stops running). Battery condition and engine cranking speed are OK. There is adequate fuel in the tank.
This engine is equipped with an all new distributorless ignition system called Computer Controlled Coil Ignition (C3I).
The EST and Bypass circuits operate in the same manner as in an HEI system.

Fig. 040 - Chart A-3 Engine Cranks But Will Not Run:

1. A "CHECK ENGINE" light "ON" is a basic check for ignition and battery supply to the Electronic Control Module (ECM).
2. Checks to see if the ECM is controlling the fuel injectors. A blinking test light at this point indicates the ECM is controlling the injectors and that ignition reference signal to the ECM is good.
3. Checks to see if problem is fuel or ignition related.
4. Checks to see if fuel pump and relay are operating correctly. Fuel pump should run for only 2 seconds after ignition "ON".
5. Checks to see if ECM is receiving reference signal from ignition system.
6. DIAGNOSTIC AIDS.
Check For:
a. Open coolant sensor.
b. EGR sticking open.
c. TPS binding or sticking in wide open throttle position.
d. Water or foreign material in fuel.
e. A defective MAF Sensor may cause a no start or a stall after start. To determine if the sensor is causing the problem, disconnect it. The ECM will then use a default value for the sensor, and if the condition is corrected and the connections are OK, replace the sensor.