Random Misfires
#13
#15
OK, well that's a problem. With the engine running, measuring across the battery should give you the same voltage as the alternator output. What is the bat voltage with the engine off? It is important to be deliberate about where you are taking voltage measurements. If you are in the engine compartment, you should make your measurements from the battery neg term to whatever you are measuring. As you dig deeper into a question, you might well want to measure from a different reference point, but start with your negative voltmeter lead on the negative terminal of the battery. Measure your engine off battery voltage; then start and measure bat again; and measure your alternator voltage with the same battery gnd terminal reference.
#16
OK, well that's a problem. With the engine running, measuring across the battery should give you the same voltage as the alternator output. What is the bat voltage with the engine off? It is important to be deliberate about where you are taking voltage measurements. If you are in the engine compartment, you should make your measurements from the battery neg term to whatever you are measuring. As you dig deeper into a question, you might well want to measure from a different reference point, but start with your negative voltmeter lead on the negative terminal of the battery. Measure your engine off battery voltage; then start and measure bat again; and measure your alternator voltage with the same battery gnd terminal reference.
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