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Old 03-20-2015, 02:14 PM
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TJ engine ID

Hi guys. New to the forum, and to Jeeps.....
Picked up a 97 Wrangler, 4 cyl, trying to ID engine. The build code looks like it's 901HX2....I know it's supposed to have another digit, but I'm guessing the last number is blocked by the ground wire and bolt. The PO replaced the engine with this engine in 2005, so I'm assuming it's a 1999, January 20 something, HX means 2.5, 150 CID, 9.1:1 compression, Multisport fuel injection?

Does this sound right? I need to make sure I'm getting the right parts, and get the e specs for a tune up. I replaced plugs, cap, rotor, wires, etc., but now it's got a little cough type miss at 2200 rpm. I'm guessing the timing is off?

Any help appreciated. Thanks.

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Old 03-20-2015, 04:07 PM   #2
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What plugs did you use?

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Old 03-20-2015, 04:13 PM
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Autolites, as spec'd
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Old 03-20-2015, 04:32 PM   #4
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Try some dielectric grease on the plug boots before you mess with the timing Just gob it into the end of the plug boots and stick them back on the plugs. This prevents arking from the tip of the plug to the base. Also do the same at the distributor cap end as well just to be safe.
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Old 03-20-2015, 05:19 PM
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Ill try that. Thanks.
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Old 03-20-2015, 09:48 PM   #6
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I personally wouldn't use dielectric grease on the distributor end of the spark plug wires ..... but that is just me. Try it out and let us know how it works.
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Old 03-20-2015, 09:51 PM   #7
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I personally wouldn't use dielectric grease on the distributor end of the spark plug wires ..... but that is just me. Try it out and let us know how it works.
I have to on my 2.4L otherwise I'll get 2 out of 4 plugs arking off the tips. And man does it crap all over it's self at 2000 rpm when that happens
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Old 03-20-2015, 09:53 PM   #8
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I have to on my 2.4L otherwise I'll get 2 out of 4 plugs arking off the tips. And man does it crap all over it's self at 2000 rpm when that happens
. Ohh the distributor end... Well I put it on the coil end just for the heck of it and haven had any issues. I can't see how it would hurt on the distributor. But I may be wrong...
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Old 03-21-2015, 07:34 PM
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I put the DE grease on all the dist and plug connections except the number 1 plug boot because I have to move the AC comp to get to it....will complete that tomorrow and let you know.......

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