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schnuz

schnuz 1/22/2013

1991 Mercury Colony Park GS 8 Cyl 5.0L

Engine

Under acceleration it shudders then bucks and misses hard. intermittently

So far: EGR, EVP, PCV & filter, fuel filter, coil, cap&rotor.
Plugs and wires are next. What about the ACT sensor.
I just learned it has no mass airflow sensor ! thanks for your help.

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