Chart A-4 Engine Cranks But Will Not Run

Fig. 083 Chart A-4 - Engine Cranks But Will Not Run:

Fig. 084 - Wiring Diagram for Engine Cranks But Will Not Run. VIN P:

CHART A-4, ENGINE CRANKS BUT WON'T RUN

7. Circuit 439 supplies ignition voltage to the injector. Probe each connector terminal with a test light to ground. There should be a light on one terminal, confirming ignition voltage at the connector. The ECM injector control circuit 467 may be open. Reconnect the injector, and using a test light connected to ground, check for a light at ECM connector terminal D16. A light at this point indicates that the injector and drive circuit are OK.
8. No blinking light indicates no ECM control of injector. With the voltmeter selector switch in the "AC Volts" position, and voltage scale switch in the 2 volts range, voltage should be greater than .7 volt AC. If the voltage is less than .7 volts AC there is an open or short to ground in HEI reference circuit 430. If the circuit is OK, there is a basic HEI problem. See FUEL & IGNITION.