What is the fuel pressure for a 5.4 L ford expedition engine

190

Asked by Aug 27, 2015 at 01:47 PM about the 2008 Ford Expedition Eddie Bauer 4WD

Question type: Maintenance & Repair

I have a 2008 Ford Expedition and I am having problems with the engine after changing the spark plugs and fuel filter, I think the fuel pressure is too high, 60 before start and above 70 engine running. Is this normal? I can smell gas on the exhaust now. No check engine and verified the spark plugs twice.

10 Answers

Yes, that is high. Might need a fuel pressure regulator, or Ford calls them modulators. Specs for the 5.4 are 35 psi +/- 5

10 people found this helpful.
190

Do you know where is the fuel pressure regulator located on the truck?

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6,225

35 psi +/-. You are way too high.

7 people found this helpful.
50

^ that is bso the pressure is 62-71 psi koer with a pressure of 62psi koeo

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30

What type of gas does a v8 5.8 liter in a 2005 ford expedition with a tredtion v8

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6,225

Normal regular unleaded. You could use premium if you want to spend the money but you won't get enough gain for the buck to be worth it.

1 people found this helpful.
20

I been having problems with speed everytime i press on the gas my 2000 Ford expedition xlt acts like its choking on something. What could be wrong it only runs about 25 35 the most

2 people found this helpful.

change the coils a all of must be a matched set and change all of the fuel injectors and it will run great

6,225

That is over kill! First, what is the milage? If it over 100k then plugs for sure. I would only replace coilpacks as necessary. At $60 each replacing all 8 gets pricy. I good quality plugs would only run $50 and if you're not going to keep it for another 100k they will be fine.

Check injectors, mine was stumbling on hard xcel, changed injectors running fine now also check coil packs and fuel filter, don’t lose the tiny o rings on the injectors , they might stay in the manifold when you pull the old injectors

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