Answer
Jul 19, 2024 - 01:56 AM
Hi there, Doug!
Let's dig into this 1977 Dodge 440 of yours and get some spark back in those plugs. You replaced the coil and the Electronic Module Resistor (EMS), that's good. No spark at the coil to the distributor cap tells us the issue might be before the coil.
Here's a quick checklist to troubleshoot:
1.) Ignition Pickup Coil: This little guy inside the distributor sends a signal to the ignition module. If it's faulty, the module won't know to fire the coil. You can test it with a multimeter, but sometimes replacing it is just easier.
2.) Ignition Module: Since you replaced the EMS resistor, the module itself could be on the fritz. Double-check you're getting power to the module and that it's properly grounded. If you're not comfortable with electrical testing, a mechanic can verify its functionality.
3.) Wiring: There might be a wiring issue between the ignition switch, module, and coil. A damaged wire or loose connection could interrupt the signal. Trace the wires and look for any breaks, corrosion, or loose connectors.
Remember, these are the most common culprits for a no-spark situation on a classic Mopar with an electronic ignition system.
Here's the thing – diagnosing electrical issues can get tricky. If you're not super familiar with a multimeter and electrical testing, don't be afraid to enlist the help of a mechanic. They've seen it all before and can have your 440 roaring back to life in no time.
In the meantime, keep me posted on what you find! And hey, if you decide to tackle it yourself, there are some great online resources and forums for classic Dodge engines.
You may need some parts in the process, click this link to be directed to our website and enter the vehicle information, followed by the part name. Our system will display available parts for your vehicle.
Good luck!!!
Let's dig into this 1977 Dodge 440 of yours and get some spark back in those plugs. You replaced the coil and the Electronic Module Resistor (EMS), that's good. No spark at the coil to the distributor cap tells us the issue might be before the coil.
Here's a quick checklist to troubleshoot:
1.) Ignition Pickup Coil: This little guy inside the distributor sends a signal to the ignition module. If it's faulty, the module won't know to fire the coil. You can test it with a multimeter, but sometimes replacing it is just easier.
2.) Ignition Module: Since you replaced the EMS resistor, the module itself could be on the fritz. Double-check you're getting power to the module and that it's properly grounded. If you're not comfortable with electrical testing, a mechanic can verify its functionality.
3.) Wiring: There might be a wiring issue between the ignition switch, module, and coil. A damaged wire or loose connection could interrupt the signal. Trace the wires and look for any breaks, corrosion, or loose connectors.
Remember, these are the most common culprits for a no-spark situation on a classic Mopar with an electronic ignition system.
Here's the thing – diagnosing electrical issues can get tricky. If you're not super familiar with a multimeter and electrical testing, don't be afraid to enlist the help of a mechanic. They've seen it all before and can have your 440 roaring back to life in no time.
In the meantime, keep me posted on what you find! And hey, if you decide to tackle it yourself, there are some great online resources and forums for classic Dodge engines.
You may need some parts in the process, click this link to be directed to our website and enter the vehicle information, followed by the part name. Our system will display available parts for your vehicle.
Good luck!!!
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