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Bronco Closed Crankcase System

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Old Aug 13, 2007 | 06:54 PM
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Question Bronco Closed Crankcase System

I have a 1992 bronco with a 351 and I have not used it in a while, i'm trying to get it back together but it doesnt seem to run right. If I remember correctly while the truck was running if I removed the oil fill cap there was suction. If I remove it now there's nothing. The truck has a fluctuating idle and I was thinking this might be the problem. I would appreciate any info on this. Thank you.
 
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Old Aug 13, 2007 | 07:11 PM
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PCV valve stuck?
 
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Old Aug 13, 2007 | 08:14 PM
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The pcv valve works fine.
 
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Old Aug 14, 2007 | 08:17 AM
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do all the basics if its just been sitting for awhile and that includes replacing the pcv. tune up, oil change and tranny service along with fuel filter change. you might even run some seafoam thru it
 
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Old Aug 14, 2007 | 05:21 PM
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I did all the basics, it really seems like a vacuum problem to me. Should I have a vacuum suction through the oil fill because I don't. Thanks
 
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