Anybody know how to do a tune-up on 2003 F-150 4.6? - PerformanceTrucks.net Forums



Anybody know how to do a tune-up on 2003 F-150 4.6?

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Old 04-18-2008, 07:28 AM   #1
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Default Anybody know how to do a tune-up on 2003 F-150 4.6?

Need to change the plugs, spark plugs, & coilpacks on a 2003 F-150 4.6. The damn fuel rails are over everything. Anybody ever done this? I'm just gonna jump in and see what I can do, but I was wanting to know if there was any easy how-to's or don't do's. Thanks.
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Old 04-18-2008, 08:59 AM   #2
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Best way to do a tune up on a Ford---->>>Sell it and get a Chevy

I don't know. I heard those modulars (if that is what this one is) are a bastard to work on supposedly it's like a 3 hour job to change the plugs for someone that knows what they are doing.

Good Luck!
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Old 04-18-2008, 12:43 PM   #3
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For someone that knows what they're doing, it's abouta 45 min job on plugs. First timer, plan on a couple hours. Easiest thing you can do is pull the fuel rails loose.
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Old 04-19-2008, 03:46 AM   #4
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Quote:
Originally Posted by 203Cree View Post
For someone that knows what they're doing, it's abouta 45 min job on plugs. First timer, plan on a couple hours. Easiest thing you can do is pull the fuel rails loose.
Thanks for the info! Do I need to loosen and pull up the injectors, while leaving them attached to the rails?
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Old 04-21-2008, 11:54 PM   #5
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if you have a good wobble socket 7mm, you can do it without having
to mess with the fuel rail. The hardest one is #5,
Take your time and do one at a time, remove the coil. then remove the
plug replace it and go on to the next.
Good luck.
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Old 06-01-2008, 09:08 PM   #6
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well on the expeditions with rear ac #4 is the hardest #5 is easy and who takes the fuel rails out? 7mm wobble and u get the cop's out with no problem (#7 has the fuel reg. next to get u push the injector towards the rear and if u need unplug the injector to gain access). I have done like 10 5.4L and 6 4.6L tune ups not to mention all the cop's replacements i have done. with an 1/4 air ratchet u should be able to knock them out in 45mins.
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03, 2003, 2005, 46, change, cost, f150, injector, plugs, rail, remove, silverado, spark, ss, tune

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