2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

What could cause low voltage coil 88 S4

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Old Jul 20, 2014 | 07:14 AM
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harley71105's Avatar
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Arrow What could cause low voltage coil 88 S4

88 S4 N/A and my trailing coil unit is at a low enough voltage that the plugs are not firing. I have swapped out the coil but this did not help,thus, What Could Cause a Low Voltage Coming Out of The Coil?
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Old Jul 20, 2014 | 10:11 AM
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Aaron Cake's Avatar
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Poor connections at the harness on the power pins?

You are measuring for 12V, right? What voltage are you seeing?

The trailings are powered by the black/yellow wire on the harness which connections to the tan wires on the coils. Unplug connector and check condition. That black/yellow wire feed loads of stuff related to the EFI system so it typically won't be failing in one location with no other consequences.
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