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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Code 311 and smog pump

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Old Dec 11, 2016 | 09:23 PM
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Code 311 and smog pump

The previous owner removed the catalytic converter and cut the hose that comes from the smog pump. Would this cause a code 311? This is a 1992 f150 302. Thanks!
 
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Old Dec 12, 2016 | 12:19 PM
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It certainly could! Especially if they unplugged the AIR system solenoids as well.
 
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Old Dec 12, 2016 | 04:09 PM
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is there anything else besides the cut hose that needs to be reattached?
 
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Old Dec 12, 2016 | 04:12 PM
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Is it worth it for me to reattach the smog pump to this valve if there is no catalytic converter for the valve to run to? Will this solve the code 311? Does this make a difference to the engine?
 
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Old Dec 12, 2016 | 04:58 PM
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With no cat, the smog pump is esentially pointless. You might as well just remove the rest of the smog equipment.
 
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