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Old 06-19-2009, 03:01 PM   #1
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Spark Plugs / Ignition Wires

I have an 01 2.5L 4cyl engine. I am looking to replace the spark plugs and ignition wires. Considering aftermarket products. Does anyone have any suggestions. Thanks!

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Old 06-19-2009, 03:23 PM   #2
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The 4.0L engine I'm more familiar with had gone to a distributorless design by 2001. Does your 2.5L engine have a distributor as I suspect it does? If so, I'd go strictly for the OE ignition wiring, aftmarket ignition wiring sets just have too many potential problems... especially the so-called "low resistance" or "performance" ignition wiring sets.

On the plug itself, I'd go for a single-tipped platinum like the Autolite AP985... assuming still that your engine has a conventional distributor as I think it does. A platinum plug like that will outlast a conventional plug by around 3X. And if you do have a distributor, go with a premium distributor cap and rotor that uses brass contacts. Cheap distributor caps and rotors only use aluminum for their contacts which dosn't last nearly as long.

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Old 06-19-2009, 06:02 PM   #3
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Plugs: copper
Wires: Borg Warner
Cap: Borg Warner
Rotor: Borg Warner
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Old 06-27-2009, 01:39 PM   #4
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I bought the autolite plugs back in December and have had problems with misfires. Just go with Champion plugs; they seem to be the only ones that don't trip the check engine light.
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Old 06-27-2009, 01:55 PM   #5
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Iv not had any issues with my champion plugs.
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Old 06-27-2009, 02:42 PM   #6
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Originally Posted by nu arty boy View Post
I bought the autolite plugs back in December and have had problems with misfires. Just go with Champion plugs; they seem to be the only ones that don't trip the check engine light.
What engine are you running, is it older and has a distributor or is it a newer distributorless model? Exactly which model Autolite plug did you install?

If you have a newer distributorless 4.0L engine, understand that it is far fussier about having the exact right model spark plug installed than older engines with distributors are. For example, installing a single-tipped platinum plug like the Autolite AP985 will definitely cause problems in a newer distributorless engine.
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Old 07-23-2009, 12:32 AM   #7
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i bought them for my 2003 2.4l........... should i have a problem?
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Old 07-23-2009, 12:53 AM   #8
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i bought them for my 2003 2.4l........... should i have a problem?
As Jerry said, which plug did you buy?

For the I-6 with no distributor you want the dual platinum tipped autolites APP985.

Not sure what the 2.4 takes or what jeep you have, but the wrong type of plug is not an "upgrade". Get the right one for your application.

I've been using the APP985's in my 06 4.0L with excellent results for a year now.
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Old 07-23-2009, 11:34 AM   #9
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the autolite single plat. ...........?
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Old 07-23-2009, 11:42 AM   #10
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actually i have another question........ what is the difference between the champion single plat. and the autolite single plat.?
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Old 07-23-2009, 11:51 AM   #11
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what is the difference between the champion single plat. and the autolite single plat.?
There's more difference in how they spell their names than there is in quality differences between them. I'd happily use either.
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Old 07-23-2009, 10:42 PM   #12
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so the single plat. will be ok for my 2003 2.4l?
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Old 09-02-2009, 09:26 PM   #13
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I have a 98 wrangler 2.5L. What would be the best wires/distributor cap & rotor for my rig. I have located the plugs from the sticker under the hood. It calls for the Champion pn# RC12LYC, but I have not yet located them in any local autoparts store.
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Old 09-03-2009, 12:03 AM   #14
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go with the autolite. champions are owned by honeywell. and honeywell products suck.
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Old 09-03-2009, 12:12 AM   #15
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they also own fram filters and they REALLY suck!
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Old 09-03-2009, 08:15 AM   #16
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With my spark plugs, I just stick with OE. It ran great with them before and it runs great now after changing them.
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Old 09-03-2009, 11:23 AM   #17
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they also own fram filters and they REALLY suck!
When did Allied Signal sell Fram to Honeywell?
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Old 09-03-2009, 11:25 AM   #18
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so the single plat. will be ok for my 2003 2.4l?
I'm not familiar with the 2.4L, does each spark plug have its own coil pack over the top of it or do two spark plugs share a single coil pack like the 4.0L does? That makes a difference on what type platinum plug it requires.
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Old 09-03-2009, 12:05 PM   #19
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actually allied signal bought honeywell back around 2000 and changed there name to honeywell. honeywell had the better customer service reputation. i know they suck because i've worked for them for 13 and a half years. they looove to cut corners anywhere they can.
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Old 09-03-2009, 12:10 PM   #20
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actually i've got it backwards. buy the champion. honeywell makes the autolites.
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Old 09-03-2009, 02:57 PM   #21
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if it helps any, i have a 2.5L '97 and put in new plugs and wire this summer when i had some arching going on on the old stock wires. went with champion double platinum #7304 then bought the regular $15 wires from napa. used dielectric grease on all the fittings/connecections. haven't really had tooo much of a problem starting it now. although i think my fuel pump or filter or something in the regulator may be leaking. since it doesn't want to start w/o some gas when cold.
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Old 09-03-2009, 03:09 PM   #22
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actually i've got it backwards. buy the champion. honeywell makes the autolites.
I've had 100% outstanding experience with all of my various sets of Autolite platinum plugs and I recommend them strongly all the time.
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Old 09-04-2009, 11:16 PM   #23
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put some auolites in today.....
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Old 09-04-2009, 11:32 PM   #24
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I hate to cutin on this topis, but I have a question. I have a 05 with straight six. It has a bar with he spark pulg caps and then plug in wires to those. Can I change these plugs myself, and if so do I just pull the bar and caps off together?
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Old 09-05-2009, 12:52 AM   #25
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I hate to cutin on this topis, but I have a question. I have a 05 with straight six. It has a bar with he spark pulg caps and then plug in wires to those. Can I change these plugs myself, and if so do I just pull the bar and caps off together?
Yes. That "bar" is a rail system that contains a coil packs (3 total) and acts as the plug wires of days of yore.

Pull the bolt near the firewall that holds the coil pack/rail in place and remove the individual plug connectors. Before you remove the plugs themselves, I recommend blowing out each location with some compressed air so when you install the new ones, you don't accidentally send any foreign objects into the cyclider with the new plugs.
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Old 09-11-2009, 03:38 AM   #26
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Use ngk plugs one of the best plugs on the market
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Old 09-27-2010, 08:24 PM   #27
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I love ngk's and have used them for years in my mr2, but I tried them in a friends cavalier once and that didn't go too well. It's funny how some cars are so picky about the plugs they run. Are the jeeps that picky as well?

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