08 Expedition 5.4 L fuel pressure

al78
Wed, 26 Aug 2015 16:07:42 +0000
Maintenance/Repairs

I have a 08 Ford Expedition with a 5.4 L engine. Recently I changed all spark plugs and the fuel filter and now the engine is not running smooth. I had the fuel pressure checked and is 60 before start and 70 while idle. Is this normal? I should mention that the old spark plugs were bad and so was the fuel filter.

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