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International Automotive Technicians Network
Re: 92 F150 fail emissions, code 173
Posted to Technical Discussion Forum on 1/27/2003

Pulse Width running __________/?

Snap Throttle ______________?

Decel____________?

Engine vacuum_____?

GAs readings idle and cruise?

Will a huge vac leak swing that 02 ?

Do check that ground as other's suggest..

Map freq? koeo and idle?

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