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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

Exhaust ?

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Old May 30, 2019 | 09:33 AM
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jmtbiggin
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Exhaust ?

1994 f250 w/ 300/C6. There is a small diameter pipe (thumb sized)that ties in exhaust pipe just above the cat beside transmission. The pipe goes up towards passenger side of engine. What is it and its function? Mine seems to leaking oil, which is burning off of the cat. Just started today, did a quick peek to find orgin of smoke. Thanks
 
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Old May 30, 2019 | 11:59 AM
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KubotaOrange76
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thats the A.I.R. pipe, comes from the smog pump for cold weather starts , controlled by computer
 
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