Tune-up Question
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New User
Joined: Oct 2006
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From: Burnham, IL
Tune-up Question
Well, after running my 99 Expedition for about a year, I am going to do the dreaded tune-up. It has the 4.6 motor with coil packs, so it should not be too hard. Worse than my 90 Mustang GT, but easier than my 2003 Windstar. I will be using Motorcraft double-platinium plug and Motorcraft wires with assistance from Miller products.....
My question is.... Do I need to replace the coil packs?
They look good and I think it is just the plugs that need replacing - ~130,000 miles on them. The cost of the two coil packs doubles my cost and they appear to be easily replaced. I am assuming that they are more of a work-don't work type part.
Thoughts????
TIA
My question is.... Do I need to replace the coil packs?
They look good and I think it is just the plugs that need replacing - ~130,000 miles on them. The cost of the two coil packs doubles my cost and they appear to be easily replaced. I am assuming that they are more of a work-don't work type part.
Thoughts????
TIA
Thread Starter
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New User
Joined: Oct 2006
Posts: 5
Likes: 0
From: Burnham, IL
Well, I finished the tune-up and anyone out there with a 4.6l motor should not fear the job. Plug #4 took the longest to get out (30 minutes out and in) as it is shrouded in hoses and vacuum lines on from the passenger side firewall. Other than that it was rather easy. I used anti-sieze, di-electric grease and torque wrench. I did not need multiple universal joints, just multiple length extensions and a spark plug socket with a univeral joint attached. One lesson I did learn, lubricate the spark plug socket boot. Otherwise you'll spend some time fishing for it on the plug. NOT FUN!
Just for your info, I used Autolite Double-Platinum plugs and Autolite Professional Fit 8mm Wires. Tehy replaced Motorcraft Double-Platinum plugs and Motorcraft Wires. I used Autolite plugs and wires only because I could not find Motorcraft Double-Platinum plugs locally or reasonably priced.
I did not replace the coil packs (NO COPS) as a friend who is a Ford mechanic of many, many years said they are a part that should be replaced in the event of a failure.
Overall, I spent about 8 hours working on the tune-up (plugs and wires) and this included removing the plastic stuff on the top of the motor, cleaning the MAF, changing the thermostat and anti-freeze, air filter, fuel filter and a few other misc. things. Overall, not too bad.
Just for your info, I used Autolite Double-Platinum plugs and Autolite Professional Fit 8mm Wires. Tehy replaced Motorcraft Double-Platinum plugs and Motorcraft Wires. I used Autolite plugs and wires only because I could not find Motorcraft Double-Platinum plugs locally or reasonably priced.
I did not replace the coil packs (NO COPS) as a friend who is a Ford mechanic of many, many years said they are a part that should be replaced in the event of a failure.
Overall, I spent about 8 hours working on the tune-up (plugs and wires) and this included removing the plastic stuff on the top of the motor, cleaning the MAF, changing the thermostat and anti-freeze, air filter, fuel filter and a few other misc. things. Overall, not too bad.
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