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Hagerty Employee

Piston Slap: Troubleshooting a Mercury Sable's hidden fuel pump relay | Hagerty Media

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https://www.hagerty.com/media/advice/piston-slap/piston-slap-troubleshooting-a-mercury-sables-hidden...
2 REPLIES 2
CitationMan
Technician

Shot in the dark here, but I believe there is an emergency fuel pump shut off switch behind the passenger side cargo wall cover. I wonder if the relay might be in that location?
Sajeev
Community Manager

Good idea. It's worth a look but the 1986 shop manual didn't say it was there.  Which really, really stinks.