Ignition system check
With the position switch turn to the on position, a glowing instrument panel battery light or oil pressure light is a basic check for battery voltage supply to the ignition system and PCM
First check all ignition wiring connections for tightness, cuts, corrosion or any other signs of a bad connection.
Check the condition of the spark plug wires. Using an ohmmeter measure the resistance of each spark plug wire and comparable and the measure value to the resistance value listed in the specifications. A bad spark plug wire or poor connection at the spark plug or coil or distributor Could also result in a misfire.
On V-6 engines, remove the distributor cap and rotor. Inspect the And rotor for moisture, cracks, erosion, carbon tracks worn rotor button or other damage. Remove one spark plug wire at a time from the So they don't get mixed up and check the terminals inside the For corrosion, which will appear as a white crusty powder, slight corrosion can be removed with a screwdriver or around wire brush. On the distributor, use an ohmmeter to measure resistance between the rotor button in the coil terminal. The resistance should be approximately 5000 ohms. On the distributor, inspect the quarrel high tension tower for cracks, carbon tracks or corrosion. If the coil is found to be defective, the entire distributor must be replaced. If the Or rotor is defective and the ignition components including spark plugs have been in service for more than 60,000 miles, the manufacturer recommends replacing all ignition components at the same time.
If the engine turns over but won't start, disconnected number one spark plug wire on four-cylinder engines or the number two spark plug wire on V-6 engines and install a calibrated ignition tester available at most auto parts stores. Make sure the testers designed for Chrysler electronic ignition systems if the universal tester is not available.
Connect the clip of the tester to a bolt or metal bracket located on the engine. If an ignition tester is not available, a good spark plug with the gap set to the maximum tolerance can also be used. Ground the threaded portion of the spark plug to the engine. Crank the engine while observing the ignition tester-if bright blue, while defined sparks occur, sufficient voltage is reason spark plug the fire, caution: if the engine starts, do not run the engine for longer than one minute during this test-the role fuel escaping from the cylinder being tested may cause damage to the catalytic converter.
On four-cylinder engines, perform this check at the number two spark plug location also. This will check the other ignition coil inside the coil pack. Note- it is not necessary to perform this check at another location on V-6 engines because that system uses a single coil.
The spark is present, the coil is firing, however, the spark plug themselves may be filed or damaged, so removing check them or install new ones.
If no spark or intermittent sparks occur, disconnect the coil electrical connector and connect a test light to the center terminal of the coil electrical connector and one of the outer terminals on four-cylinder engines or across both harness terminals on V-6 engines
With the test light placed where you can see it from the driver's seat, crank the engine and watched the test light, issued flash on and off while the engine is cranking up the test light does not blink checked the wiring harness for damage or short. If the wiring is okay, checked operation of the automatic shutdown also known as the ASD relay. If necessary, check the operation of the camshaft and crankshaft position sensors. If the ASD relay and cam/crank sensors check out okay have the PCM diagnosed by a dealer service department or other qualified repair shop.
If voltage is present meaning the light blue is blinking, check the ignition coil and replace it if necessary.
If these checks do not identify the problem, further diagnosis should be made by a qualified dealer service department or other qualified repair shop
More Diagnostic procedures