How to troubleshoot a 1977 Ford Duraspark ll ignition?
How to troubleshoot a 1977 Ford Duraspark ll ignition?
Inspect the circuit from the starter solenoid “S” terminal, if the voltage is weak or missing entirely. Replace the solenoid if no faults are found in the circuit. Probe the red wire leading to the ignition module with the ignition switch in the “Run” position to ensure a proper voltage signal.
Where is the ignition coil on a Ford?
Locate the coil on your Ford engine. The coil looks like a black cylinder with a center wire similar to a spark plug wire and two side posts with nuts and wires attached. Remove the large wire from the center of the coil by pulling it straight out of the coil.
What should resistance reading be on Ford ignition coil?
Keep the other lead on the positive post of the coil. Note the resistance reading on the ohmmeter. Your coil should have a reading of between 6,000 and 15,000 ohms for your Ford. Replace the coil with a new one if the readings are outside either of these ranges, as that would indicate a defective coil.
Where is the spark in an ignition system?
Electronic ignition pickups are a component found on traditional electronic distributor ignition systems. They are located inside the distributor and function as the trigger for the ignition system to produce spark. The pickup coil monitors the rotation of the distributor and triggers the ignition system.
Inspect the circuit from the starter solenoid “S” terminal, if the voltage is weak or missing entirely. Replace the solenoid if no faults are found in the circuit. Probe the red wire leading to the ignition module with the ignition switch in the “Run” position to ensure a proper voltage signal.
Locate the coil on your Ford engine. The coil looks like a black cylinder with a center wire similar to a spark plug wire and two side posts with nuts and wires attached. Remove the large wire from the center of the coil by pulling it straight out of the coil.
How does the Duraspark II ignition coil work?
The Duraspark II ignition coil is capable of generating a higher voltage than the regular coil. The wiring is attached via a special snap-on connector. Power is supplied to the coil in the same fashion as the older breaker point ignition.
Keep the other lead on the positive post of the coil. Note the resistance reading on the ohmmeter. Your coil should have a reading of between 6,000 and 15,000 ohms for your Ford. Replace the coil with a new one if the readings are outside either of these ranges, as that would indicate a defective coil.
Why is my car cranking but not starting?
If the spark plugs are old, worn, fouled, or damaged, they might not spark. When there’s no spark, there’s no starting. What Can Cause a No-Crank, No-Start Situation?
How to troubleshoot a no start Ford 4.9L?
Once you’re tapped in, have a helper crank the engine while you observe your multimeter in Volts DC mode. If voltage is present (12 Volts), then you have confirmed that the fuel pump fuse, fuel pump relay and inertia switch are working perfectly.
Why does my ignition coil not have a spark?
If the ignition coil has spark, there must be a problem with the distributor or the wiring between the ignition coil, distributor, and spark plugs. Replace all three. If the ignition coil does not have spark, it’s time to check its wires. Use a test light to check the continuity on the signal wire and power wire on the ignition coil.
Can a cranks but not start test fail?
Your helper should stay outside the vehicle and away from the ignition switch before and after you set up the test. TIP 3: The ignition coil is not the only thing that can cause a cranks but does not start condition, when it fails. Other components can fail and provoke a no start.
Why does my Car Crank but does not start?
Usually, the majority of the Cranks but Does No Start conditions I’ve troubleshooted and repaired over the years, had their root cause in the ignition system. So, my recommendation to you is to check for spark at all of the spark plug wires with a spark tester.
How to troubleshoot a no start ignition coil?
How To Troubleshoot A No Start (Ford 4.9L, 5.0L, 5.8L). This may seem like a no brainer because the most obvious symptom of a bad ignition coil is a no start no spark condition, but here are a few other symptoms you’ll see along with no spark:
Why does my Ford 4.0L have no spark?
Remember, the idea behind checking for spark is to see if all of the 6 engine cylinders are getting spark. Here are the most common causes of a no spark result:
Why is my ignition not working on my Ford muscle car?
If voltage is not getting to the coil than the problem is either a bad ignition switch or a bad connection some where between the ignition switch and coil. If you replace the ignition wire keep in mind that all older Fords used a ballast resistor between the ignition switch and the coil to drop the voltage down around 9 volts.
Why does my spark plug not connect to the distributor?
If you have an older stile distributor cap with female connections the coil to distributor wire will not connect directly to the spark plug tester, but this is not a problem as the wire can be replaced with one of the regular spark plug wires.
Can a bad spark plug cause an ignition failure?
More likely if your spark plug wires are going bad the motor will run but one or more cylinders will have a miss resulting from a reduction or lack of spark at the plug with the bad wire. There is one exception where a bad wire will cause complete ignition failure and that is the wire between the coil and the distributor.
If voltage is not getting to the coil than the problem is either a bad ignition switch or a bad connection some where between the ignition switch and coil. If you replace the ignition wire keep in mind that all older Fords used a ballast resistor between the ignition switch and the coil to drop the voltage down around 9 volts.
If you have an older stile distributor cap with female connections the coil to distributor wire will not connect directly to the spark plug tester, but this is not a problem as the wire can be replaced with one of the regular spark plug wires.
More likely if your spark plug wires are going bad the motor will run but one or more cylinders will have a miss resulting from a reduction or lack of spark at the plug with the bad wire. There is one exception where a bad wire will cause complete ignition failure and that is the wire between the coil and the distributor.
Why are there no points in a Duraspark ignition?
With a duraspark system there are no points, as it is the function of the ignition module to disrupt the current through the coil. The advantage of electronic ignition over points is simply the speed and reliability of an electronic switch is far superior to that of a mechanical switch.
When was the Duraspark II ignition system used?
Duraspark II electronic ignition was used on 1977 to 1984 Ford V-8 passenger car and light truck engines.
Can a bad spark plug cause a car to not start?
If you have a spark than the problem is in the distributor or ignition module. Bad spark plug wires will almost never result in a motor that will not start, the reason being that all four to eight wires would have to fail at the same time to cause the motor not to start.
What kind of bushing does Duraspark II have?
This article refers to the Duraspark II control module with a BLUE strain relief bushing, one 4-pin connector, and one 2-pin connector. Another version of the system has an additional 3-pin wiring connector, and two YELLOW strain relief bushings. Discussion of that “dual mode” system will be added later.
Duraspark II electronic ignition was used on 1977 to 1984 Ford V-8 passenger car and light truck engines.
When does the ignition coil start to spark?
The action of switching ON and OFF the primary voltage (ignition coil’s battery power) is referred to as the switching signal. Once the ignition coil gets this switching signal, it starts to spark away and as you’re already aware, this spark gets delivered to the center of the distributor cap by a high tension wire.
If you have a spark than the problem is in the distributor or ignition module. Bad spark plug wires will almost never result in a motor that will not start, the reason being that all four to eight wires would have to fail at the same time to cause the motor not to start.
What causes a Ford F150 to not start?
In this article I’ll show you a very simple, easy and highly accurate way to see if the ignition coil on your 4.9L, 5.0L, 5.8L Ford F150 (or E150, Bronco, Crown Victoria, Grand Marquis, etc) is fried and causing your vehicle to NOT START or not the cause of the problem.
What kind of ignition module does a 1993 Ford F150 have?
Applies to: 1992-1993 Ford F150. 1992-1993 Ford F250. 1992-1993 Ford F350. All of the information you need to diagnose a misfire or a no-start problem (caused by the ignition module or the ignition coil). Wiring diagram. Component pin outs. Connector pin outs. Firing order. Ignition system component parts numbers.
Can a Ford Truck start with a misfire condition?
Whether your Ford or Mercury car or truck CRANKS but DOES NOT START or runs with a MISFIRE Condition, this article is for you.
