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Old 09-12-2010, 06:18 PM   #1
Join Date: Sep 2010
Posts: 2
Rebuilt my 2.4 now won't start. Firing problem?

I have a 2004 Wrangler w/ 2.4L motor. I lost a rod bearing in the motor, so I pulled it, put in a new crank and rod. Replaced the piston rings. Head and valves looked good, so I didn't mess with them. Put a new timing belt and plugs in. I didn't replace the plug wires.

Cleaned everything well, put it back together and in. It will sputter every so often, but won't start.

I pulled the front end apart and re-checked the valve timing, and it's right (as far as I can tell from my Haynes manual).

The plugs are getting wet. I've verified that all 4 cylinders have good compression (my compression tester isn't long enough, so I can't give you an exact reading).

Checking the plugs, each one seems to spark when the appropriate cylinder is on compression, BUT, they only seem to spark every 3 or 4 compression cycles.

Where should I start checking? My Haynes manual is USELESS (I even had to look up the Crank and cylinder specs online). I am going to buy new plug wires, but each cylinder acts the same (firing every 3 or 4 compressions). Is there a sensor I should test (Crank Position or the one on the exhaust cam) and if so can you tell me how? Or is something wrong with coil pack? Can I test the inputs to the pack?

I did clean the grease and crap off the coil pack with gas and a brush during the rebuild.

Thanks in advance.

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Old 09-12-2010, 06:26 PM   #2
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Are you sure you got the distributor back in time? BTW, its a 2.5 not a 2.4

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Old 09-12-2010, 08:04 PM   #3
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It's a 2004 so it's a 2.4L
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Old 09-12-2010, 08:16 PM   #4
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Whoops, I read it fault
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Old 09-12-2010, 08:42 PM   #5
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PM me if you want the Factory Service Manual.
Retired my 94 YJ 4cyl 5spd @ 200K
Now in a 04 TJ 4cyl 5spd CV @120K+
Both as a commuter vehicle in NW, NJ
April 2012.downsized and now a 99er.
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Old 09-13-2010, 07:01 AM   #6
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Yes, it's the 2.4. No distributor. Just a coil pack with 4 terminals, one for each plug.

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