2006 Lincoln mark lt 5.4 Hard start

[oasis supernova]

Having issues w starting my truck. Cranks over fast but for a long period of time before starting. I'd say 8-10 seconds. If I prime the fuel pump say 2-4 times it starts better. Runs normal after starting. Maybe a lil low rpms at stops. Say 400-500rpms. I've recently changed all coil packs spark plugs the fuel diverter module put in a carter fuel pump new fuel filter. Changed oil over to mobile 1 full synthetic. Not sure if its a injector or fuel pressure regulator or what not. Any help would be greatly appreciated. Oh 190,000 miles. Other then that fuel module. No issues. Thanks

[lee reece]

If its a sensor malfunctioning then a code would be set in memory. Does your check engine light ever came on ? Start with a scan to see if there is code set! Let us no!

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[oasis supernova]

Never get a code. Check engine light never comes on

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Forgot to mention. Sometimes it feels like theres a slight miss. Barely noticeable

[RhinoZ24]

How long ago did you change the plugs and COP's? And how long has this issue been occurring for?

[oasis supernova]

All coil packs year and a half ago. Spark plugs about a month or two ago. I think it started before or after the fuel pump and fuel pump diverter module. Which I replaced about 3 monghs ago. Currently has 190,000 miles. Thanks for the responses guys. Greatly appreciated. I'm thinking fuel regulator or fuel injector. Put in a carter fuel pump

[cbrxxtreme]

What did you find out? Sounds like the same problem my 06 F-150 is having with the 5.4 motor. Thanks.

[lee reece]

Sounds like low fuel pressure I would check that and see what is the recommended psi

2007 F150 XLT FX2 SPORT - 5.4l 3V 3.73 LIMITED SLIP EDGE/EVOLUTION PROGRAMMER