So, I was busy checking my engine compression when I ripped one of the boots from the cable. I asked me wife to run down to the Oriely's to pick up "1990 jeep cherokee 4.0 spark plug wires" for me while I kept checking the compression. When She got back, I started plugging the wires back in (she came back w. BWD # cH472). I noticed a few of them seemed a bit off. The ends weren't all the same, and one of them had the connector sticking right out.... I figured this was because its a "newer" product?!?!... Even had trouble plugging one of them in. So Im about wrapped up and attempt to fire it up.


Did. Not. Sound. Good... Needless to say, I let it run but it eventually evened out, the ignition an all, but still sounded like it was missfiring. When I tried to back it out of the garage, it really sounded fugly. Putting it in drive scared the crap out of me so I just parked it in a stall. To get to my question:

So these plugs are for a 2.5.... Why they would confuse "4.0" with a 4 cylinder (excuse my french), but it bugs the living **** out of me for their #@$#@ing incompetance.(or my wifey grabbing w/e they handed her lol) BUT, will this throw my timing off? I suppose i'll find out when I get the RIGHT ones from NAPA....

 

How many wires were in the package?

 

6.. The package code was CH 472, for a 2.5, even the receipt reflects this. I'm taking them back. I was rushing cause it was getting late and didn't really dawn on me the one less wire.

 

Get the correct wireset.

 

Even w my mix matched wire set, I double checked the sequencing three times with my Haynes manual. Will give an update tonight.

 

Haynes is frickin wrong IIRC. Please use the info provided here on CF.

 

I. Am. Sooo dumb.

All my fussin and the reason for my misfire was a fairly bent plug end. Checked all plug gaps and everything code 4

If you cannot tell, the gap. .. well there was no gap. <br/>

 

Easy. And, it takes a hell of a guy to admit something like that......

 

Oy, I can still see some light coming through, mate!
Nothing to " throw a cat through" (was that you Cruiser, who came with that? haha), but hey, you found it. How does it run now, happy?

 

Glad it's just a bent plug. I'm having a similar issue with my 98 and can't track it down. Just took the front end off yesterday so I can take a look at the previous owners shadetree install on the timing chain.

 

That was me. LOL.