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1991 Ford Ranger 2.9L Excessive Emissions
Posted to Ford Driveability on 10/31/2002 13 Replies

co levels will not drop less than 3.5% o2 switching fine sensors in spec,has dual exhaust with only one o2 installed in rt [...] injectors or create a vacuum leak co does not change.o2 still switches [...] good and all grounds ok.I'm lost with ideas

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car Vehicle Data

1991 Ford Ranger

VIN [No VIN Available]
Engine2.9 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFI / multi port
Emissionsus fed
SymptomsExcessive Emissions
OccursAlways
Misc.Pickup
Message Closed

car Vehicle Data

1991 Ford Ranger

VIN [No VIN Available]
Engine2.9 L / 6 cyl / GAS
Trans5-speed Standard
DeliveryFI / multi port
Emissionsus fed
SymptomsExcessive Emissions
OccursAlways
Misc.Pickup