What happens if there is no power to the distributor?
What happens if there is no power to the distributor?
Cause car will do other functions with out ecu powered up. It just won’t run. Most will turn over and act like they are trying to start but won’t if no power to ecu. 4 people found this helpful.
What do I need to troubleshoot a performance distributor?
To do this, you will need a 1/4-inch nut driver and a multi-meter. To test the resistance of the coil, remove the coil cover so you can see the red and yellow wire. Using the multi-meter set on the ohms setting, touch the positive lead to the red wire terminal and the negative lead to the yellow wire terminal.
What to do if your distributor has no spark?
If, for some reason you have no spark coming from your distributor, the following will help you check and test the installation, connections, and components, of the unit so that you can get your engine running. The first area they suggest you check is to make sure all the wire connections on the cap or solid.
What should the voltage be on a HEI distributor?
Disconnect the green and white wires from the module and touch the positive meter lead to the green wire and the negative lead to the white wire. The normal reading should be between 800 – 910 ohms. Testing the primary circuit of the coil. The remaining electronic part that would keep the distributor from firing is the module.
Cause car will do other functions with out ecu powered up. It just won’t run. Most will turn over and act like they are trying to start but won’t if no power to ecu. 4 people found this helpful.
What does GM code 12 no distributor pulses mean?
GM Code 12 No Distributor Pulses. Trouble Code 12 is a special case code that is not logged into the ECM’s Non-Volatile Memory (NVM) when detected. When the ignition is ON and the ECM detects no ignition reference pulses coming from the ignition module, it illuminates the Service Engine Soon lamp.
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.
What kind of voltage does a performance distributor need?
If the connections are good, you next need to make sure the unit is getting a strong 12 volts. Many times, a low-voltage issue can cause a myriad of problems. The wire carrying the 12 volts should be a minimum of 12 gauge, and have no resistors in line.
How to diagnose the cause of no power?
Pull out the plug from one of the coil packs and see if it is getting power, has a good ground, and has some kind of signal coming from the ECU. If it does, chances are it’s the coil pack itself that’s failed (though both failing at the same time seems unusual).
What to do if your ECU is not getting power?
If you’ve established that you’re not getting a spark at the plugs, the next thing to do would be to work back – so test the coil packs. Pull out the plug from one of the coil packs and see if it is getting power, has a good ground, and has some kind of signal coming from the ECU.
What happens when there is no spark from the ignition coil?
1 Power. Two positions of the ignition switch provide power to the positive primary post of the ignition coil. 2 Signal. With no external signal to the coil negative primary post, voltage would travel through the ignition coil windings without inducing any secondary spark. 3 Flow. 4 Open Circuits.
What happens when you replace the coil wire on an engine?
You can replace the secondary coil wire on an engine that uses one with an equal length of vacuum hose and the engine will start and run. The powerful spark will travel down the hollow hose to the distributor cap, but the engine will stall under any load because of the weakened spark.
How can I test the spark at the coil?
Using an Adjustable Ignition Spark Tester Test the ignition coil positive and negative side. Check for voltage output at the ignition coil. Disconnect the ignition coil wire from the distributor and install the spark tester to the wire and ground the tester to the engine. Crank the engine for a few seconds.
Where does the power come from in the ignition switch?
Two positions of the ignition switch provide power to the positive primary post of the ignition coil. In the “start” position, the switch energizes the starter motor, and full battery voltage is directed to the coil while the engine cranks.
