can someone explain coilpacks/wires on an 01' - ever need to be replaced?

since the 01's don't use regular spark plug wires but those coil packs/harnesses - are the harnesses supposed to be replaced at some point? Packs as well or just the harnesses, or should neither need to be replaced?

 

The wires should be replaced every 60k I believe. I think some people do it every 30k. I just replaced my wires a couple weeks ago because I just passed 65,000 miles. I didn't bother with the coil packs, but I think I'll replace those at 90k when I do my timing belt and water pump.


Edit: Please correct me if I'm wrong. Those are numbers I thought I read when I was researching changing plugs and wires earlier in the summer. I may have mixed them up, I'm not sure.

 

90k is a good number. On my '99 Mazda, the coils started failing at around 100k, resulting in misfires.

 

so both the coil packs and the harnesses are to be replaced?

I forgot to mention; this is a 2.7

 

I would never replace a perfectly functioning coil. They often last the life of the car.

 

Ive been thinking about doing this myself.
sub

 

WRONG!

as the former owner of a 2000 mustang gt, and a 97 as they called it 'lite-duty' F-250 with the 5.4, time, weather and miles takes its toll on the coils.
after 100,000 miles, Thats alot of sparking! they start to lose their efficiency, it will effect performance and mileage, but its gradual.
But when they fail, they fail, and don't be far from home.
on my stang, now i keeped that car well tuned, but i think it was MDS came out with high performance replacement coils for the 4.6, I think this was in 2006, but it was about 450.00 for 8, but I could not believe in the difference. the idle was silk smooth,again,and she had more snap going to the redline,(that does not help with mileage)
spending your entire life under the hood of a car or truck is not conducive for aging well, and its not the wear on the outside, its core of the coils that wears out.

 

Your post offers no reason why my post is WRONG. Just because your FORD coils crapped out early does not mean that the coils in these trucks do not "often last the life of the vehicle" as I stated. My truck has 157K on the ticker and runs perfectly with original coils. I have not seen a rash of coil related posts here, leading me to believe that replacing them as some form of routine maintenance is a waste of money. The alternator will give out at some point, too, and probably somewhere inconvenient. But I'm not throwing $300 at the truck for a new one until it does!

 

I guess we can say ford makes inferior coils

 

yes I do believe ford had lets say "quality problems" with the coils they used.

As for the other commits things do wear out, there is very little that man can make that is going to last forever.
My point is that the coils do wear out over time. Some people are happy waiting for things to fail or break before doing maintenance.

 

yeah i have had a few alt. go out on me over the years, thats no big deal they work until they die. they dont thow the spark to keep the motor running, and when one fails your truck is going to run funny, if at all.
and with a stick all you do is pop the clutch.

 

Sorry but this is not a valid argument. Ford is notorious for their shitty coil packs and ignition modules, on the other hand Toyota's electronics are the exact opposite.

Going around telling someone to replace a perfectly working part is not good advice. EVERY single part under the hood is going to be subjected to the same heat and temperature changes of the coils. If that's the case, we should just start randomly replacing anything under the hood. Might as well replace the alternator, hell let's just replace the whole engine with your advice.

 

I have brand new coils and wires that I keep in my tool box along with some tie rods, studs, etc... I take these for long trips, offroading, etc... but I havent replaced coils/wires for going on 120k miles and the truck runs just fine.

 

well just go buy a new car every day. I never said a damn thing like that.
I don't care if you ever change your underwear, the op asked for some advise and since he seems to be having some problems with his truck i was just trying to give him some honest advise from my experiences. and another quack posted that you NEVER change then BUT sometimes you do, and at least if he can take them out and inspect them and they do not cost a arm and a leg ( like having to take it to a dealer) it could point him in the right direction, I believe in another thread his truck is not running, so pardon me please for just trying to help.
I do believe that this is what the website is for and and not this.
have a nice day.

 

^^ Thanks. Didn't know the question would prompt such responses

I've since got my taco up and running, and running good.

I was asking cause I was confused about the coil packs and wiring harness.

Is the wiring harness pricey? Seems like the harness also contains the connectors for the IAC and TS and other stuff - like they're all woven together...

 

Can't we all just get along?

 

Now just so every one will know, I am writing this under the assumption that you have the 3.4 v6.
yes its a two piece set, at least that is what i have checked on at rockauto.
I would use the denso, one box is the 3 coils, the other box is the wires and I believe its the drivers side, plug boots.
I have changed the wires one my truck and monday I am orderings new coils, since winter is coming, and I have my first emissions test in nov. amd I want her in tip top shape.
the coils are one the passenger side.
2 tips. if you replace the wires, take out the new ones and lay them out one by one, and replace front to back and match up the wire size as you go. and that way its easier to put it back as close as possible the way it came from the factory.
get a packet or two of the plug grease, and cove the wire boots and the coil boots with it to help protect them from drying out and from moisture, (even tho some think they will last forever)

the v6 runs on the toyota slave system. one coil fires two cylinders, it was new to me too. now with this I am just talking about the ignition, when you say "wiring harness" that would cover the electoral under the hood, battery, alt. starter, .=ect.

those parts are not too $$$ for how long they last. wire set is about 60 or so and the coils are like 80 each, and only 3.
and if you can, order from ebay or rockauto part stores and dealers just bend you over one this stuff.
I know they have to make money, but let them make it off someone else!

 

I just bought the factory wire set from Camelback for $56, also got the factory fuel filter for $27 to push the total over $60 to obtain the free shipping. You can't buy the coil boots from a dealership, those I purchased from Amazon.com for $29 for the Denso as that is the brand of the factory coils.This winter when water pump,timing belt,hoses,idler,tensioner,thermostat and all belts are replaced all (3) coils will be also. OVERKILL? Maybe! I hate being broke down with my bird dog or boat.

 

no, I have a 2.7