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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

EGR Valve

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Old Apr 1, 2008 | 08:58 PM
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EGR Valve

Is the EGR supposed to get hot enough to burn through a vacuum hose? Also is there any way of knowing if it's bad or not?
 
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Old Apr 1, 2008 | 09:16 PM
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It shouldn't be that hot. It has a rubber diaphragm inside of it. I will reach around and push on it to test them. Sometimes they will stick open due to carbon deposits.
 
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Old Apr 1, 2008 | 09:51 PM
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Hook up a hand-operated vacuum pump to it, apply some vacuum, see if it opens/closes properly.

-ct
 
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Old Apr 2, 2008 | 07:17 PM
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Would it cause bad gas mileage also if it's stuck?
 
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Old Apr 2, 2008 | 07:36 PM
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Not necessarily, since it is open normally going down the road, but it can at slower speeds.
 
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