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Ignition upgrades?


 
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ebayxj
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Joined: 28 Feb 2006

PostPosted: Tue Feb 28, 2006 9:46 pm    Post subject: Ignition upgrades? Reply with quote

Howdy all,
This is my first post here, and I like what I've seen so far.
I have a 1999 xj w/ the 4.0 I-6, and I'd like to do some performance mods. so far I'm gonna get a better intake, exhaust, and upgrade my plugs and wires.

My Questions are:

1: are the quad-pronged spark plugs all that great for the late 90s engines? (lots of contention here, I saw so far)

2: what are some recommendations for upgrading the ignition coils and all that stuff. I'm not a huge mechanic-type person, but I can tackle some things. is this something I could undertake?

3: what about new fuel injectors? worth the hassle?

That's all I can think of right now. THanks for your input.
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1999 Jeep Cherokee, 4.0 I-6 Bought via EBAY auction.
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shotgun
Member


Joined: 23 Jan 2006

PostPosted: Wed Mar 01, 2006 8:04 am    Post subject: Reply with quote

My opinion is buy the DUI ingnition system alot of bang for the $169 bucks.
I think the dual and quad plugs are equvilent to a good quality normal everyday plug. With the DUI you'll need to gap the plugs which throws the dual and quads out as they cannot be gapped.
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Mopar500
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Joined: 21 Feb 2006
Location: Colorado

PostPosted: Wed Mar 01, 2006 2:48 pm    Post subject: Reply with quote

What is a DUI ignition system? Confused
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shotgun
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Joined: 23 Jan 2006

PostPosted: Wed Mar 01, 2006 4:32 pm    Post subject: Reply with quote

Davis Unified Ignition. It's upgrade parts to your stock Jeep iginition system. Most people recogonize DUI from the ads in the back of most 4x4 magazines. Basically they give you a cap, rotor, wires and coil. They have nearly every make and model covered. They don't list it, but they have a high power system for the Jeep 2.5L as well. You have to call them to get the 2.5.

http://www.performancedistributors.com/jeep4.0.htm
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