1986 Chevy S-10 engine noise

1986 CHEVROLET S-10
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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ROLAND86
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  • 1 POST
tapping noise from engine when in gear or when engine is under load. dont here noise when revving engine. goes away when driving engine warm.
Feb 10, 2008 at 9:04 AM
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MERLIN2021
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  • 17,250 POSTS
Check on the exhaust where the pipe meets the manifold for the EFE valve, could be the butterfly inside has finally come loose!


https://www.2carpros.com/forum/automotive_pictures/62217_86_EFE1_1.jpg


https://www.2carpros.com/forum/automotive_pictures/62217_86_EFE_1.jpg

Feb 10, 2008 at 9:18 AM