Engine Cranks But Won't Run 2.2L (VIN 4) "L" Carline (Port)

CHART A-3

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





Test Description: Number(s) below refer to circled number(s) on the diagnostic chart.
1. ^ A "Service Engine Soon" light "ON" is a basic test to determine if there is battery and ignition voltage at the ECM.
^ No ALDL data may be the result of an ECM problem, and CHART A-2 will diagnose an ECM problem.
^ If TPS is less than .2 volts, the TPS 5 volt reference circuit could be shorted to ground. If TPS is over 2.5 volts, the ECM could be in the "Clear Flood Mode" which may cause the engine to not start.
^ The "Scan" tool should display rpm during cranking.
2. Because the DIS uses two spark plugs and cables to complete the circuit of each coil, the opposite spark plug cable should be left connected.
3. This test is performed with injectors 1, 2, 3, and 4 in parallel.
4. The test light should flash, indicating that the ECM is controlling the injectors. How bright the light flashes is not important.
5. Ignition may have to be cycled "ON" several times to obtain maximum fuel pressure.
6. Damage to the ECM injector driver may occur if any injector resistance measures less than 11.6 ohms (internal short to ignition CKT 439).

Diagnostic Aids:

^ Water or contamination in fuel system may cause a no start condition during very cold or freezing weather. The engine may start after approximately 5 minutes in a heated shop.
^ An EGR valve sticking open can cause a rich air/fuel ratio during cranking. Unless the ECM enters "Clear Flood Mode" at the first indication of a flooding condition, it may result in a no start condition.
^ An A/C pressure sensor with an internal short to ground can cause a no start condition. Disconnect the A/C pressure sensor, if vehicle starts replace faulty sensor.
^ A MAP sensor stuck between .5 and 2.5 volts can cause a no start condition. Disconnect the MAP sensor, if vehicle starts replace faulty sensor.





LACK OF POWER, SLUGGISH OR SPONGY





HESITATION, SAG, STUMBLE





CUTS OUT, MISSES