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International Automotive Technicians Network
Re: Ignition ground diagnostics
Posted to Technical Discussion Forum on 10/22/2017 6 Replies

[MAF WOT snap]

This is an unusual Ford MAF WOT snap, where a COP or a coil wire's secondary voltage is leaking to ground during snap throttles, which would pull the positive MAF voltage down to negative 5v.

The time between the 1st negative spike to the 2n... Login to read more.

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