Question about 1998 Dodge Durango
You Know Your only supposed to have voltage for about 2 seconds on coil dark green with a orange tracer. When you cycle key on there should be voltage for about 2 seconds and then shut off.
Posted on Feb 07, 2010
What is a car coil?The coil is a high voltage transformer, used to step up battery voltage to 50,000 volts to fire the spark plugs.
What does the coil on a car do?
Short answer: Fires the spark plugs.
The ignition coil is nothing more that an electrical transformer. It contains both primary and secondary winding circuits. The coil primary winding contains 100 to 150 turns of heavy copper wire. This wire must be insulated so that the voltage does not jump from loop to loop, shorting it out. If this happened, it could not create the primary magnetic field that is required. The primary circuit wire goes into the coil through the positive terminal, loops around the primary windings, then exits through the negative terminal. The coil secondary winding circuit contains 15,000 to 30,000 turns of fine copper wire, which also must be insulated from each other. The secondary windings sit inside the loops of the primary windings. To further increase the coils magnetic field the windings are wrapped around a soft iron core. To withstand the heat of the current flow, the coil is filled with oil which helps keep it cool. The ignition coil is the heart of the ignition system. As current flows through the coil a strong magnetic field is built up. When the current is shut off, the collapse of this magnetic field to the secondary windings induces a high voltage which is released through the large center terminal. This voltage is then directed to the spark plugs through the distributor.
check the Crank and cam shaft sensor The Auto Shut Down relay supplies power to the ignition coil and injectors. If there is no power, there will be no injector pulse and there will be no spark from th ignition coil. The asd relay could be bad. Or the computer may not be energizing the relay. IF that is the case, the inputs to the computer may be bad (possible bad cam or crankshaft position sensor) or powers and grounds. AUTOMATIC SHUTDOWN (ASD) RELAY As one of its functions, the Automatic Shutdown (ASD) relay will supply battery voltage to the ignition coil. The ground circuit for the ASD relay is controlled by the Powertrain Control Module (PCM) . The PCM regulates ASD relay operation by switching the ground circuit on-and-off. also the fuel pump cause the ASD to trip. if everything is ok.the car requires new coil pack.get it replaced from local car garage.
car has no power to coil packs or fuel pump
check the MFI relay.. It is n te underhood junction box
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Posted on Feb 09, 2010
If the positions of the air discharge can not be changed to any position the control head needs to be replaced. If all but one position can be changed remove the glove compartment and look at the motors on the housing that is visible with the glove box removed. With the key on, move the control panel functions and watch each motor function by moving in or out. Check for a vacuum on the motor that does not move. Check with the engine running or in the case of an electric motor check for power. If either one has a source, be it vacuum or electrical than the motor is bad. If no source and a good fuse then the control panel is malfunctioning and needs to be replaced. hope this helps, have a nice day
Posted on Feb 09, 2010
Have you check the fuses in the power distubution block under the hood? the power to coil is fused.
Posted on Feb 08, 2010
In the diagram you will see you should have 12 v
on 2 spots at ASD relay. One is hot all the time, one hot only with key
on. You should be able to jump across with relay removed to go direct
to coil with 12v. Or using the diagram, you can use a couple jumpers
and instead of PCM making ground, just run a wire to ground on engine.
If everything works that way, then yes, you could have bad PCM...
Engine speed and crankshaft position are provided through the crankshaft position sensor. The sensor generates pulses that are the input sent to the Powertrain Control Module (PCM) . The PCM interprets the sensor input to determine the crankshaft position. The PCM then uses this position, along with other inputs, to determine injector sequence and ignition timing.
The sensor is a hall effect device combined with an internal magnet. It is also sensitive to steel within a certain distance from it.
On these engines, the flywheel/drive plate has 8 singles notches, spaced every 45 degrees, at its outer edge.
The notches cause a pulse to be generated when they pass under the sensor. The pulses are the input to the PCM. For each engine revolution, there are 8 pulses generated on V-8 engines.
The engine will not operate if the PCM does not receive a crankshaft position sensor input.
The sensor is bolted to the top of the cylinder block near the rear of right cylinder head. The sensor is accessed by removing the right front fender liner.
Hope helps with this.
Posted on Feb 05, 2010
Check the automatic shut down relay and wiring.This relay is located in the under hood fuse/relay center.The power to the coil comes from the ASD relay.Also make sure it is making good contact in the fuse panel.Also make sure you check the fuses.Just use a test light and check them all.Hope this helps and let me know if you need any more help.Good luck.
Posted on Feb 04, 2010
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Posted on Jan 02, 2017
could be Fuel Injectors, are bad ?
all you need is # 1 Fuel Injector, to go out that will not get Fire, and Fuel Mixture to Spark Plug.
Posted on Jun 03, 2009
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