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Old 12-15-2013, 04:46 PM   #1
Vale's Avatar
Join Date: Aug 2012
Posts: 26
Question Misfiring Advice

Yesterday my 2004 i6 started running really rough while on a small roadtrip. It seemed to loose power, occasionally sputter and almost die. It's real rough at idle, shakes, and the check engine light came on.

I got the codes and it's telling me there is a misfire on cylinder 1 and 6.

The issue is that I am currently parked about 5 hours from my house and essentially tool-less.

Does anybody have any advice? Things to check right now? Within the next week I'm going to have to go the 5 hours home and I would not like to drive it in its current state.


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Old 12-15-2013, 05:23 PM   #2
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Spark plugs, wires, distributor cap and rotor, ignition wires, ignition coils.

I would look at those things. I am NOT a mechanic though.

Get to Wal-Hell and buy a small tool set or see if Autozone can rent you a few tools in the parking lot.

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Old 12-15-2013, 05:32 PM   #3
Join Date: Apr 2013
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Three coil pack fires 3 pairs of cylinders every revolution of crank

One does 1& 6
One does 2 &5
One does 3 & 4

So if one and six that coil / wires to that portion of coil pack is a good place to start
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Old 12-15-2013, 05:37 PM   #4
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Mine ran very rough until i got the distributor replaced, as well as plugs and wires. Now it runs awesome!, Good luck!
Always the one with the most carnage, most stuck
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Old 12-15-2013, 06:46 PM   #5
Join Date: Apr 2013
Posts: 2,680
The 6 cylinder TJs stopped having distributors after 1999
In 2000 they went to a coil pack with silmaltaneous firing of two spark plugs every 120 degrees of crank rotation

FSM says the spark on exhaust stroke is just waisted
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Old 12-17-2013, 11:38 AM   #6
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Join Date: Aug 2012
Posts: 26
Thanks guys. Turns out it was just bad gas that I got. I filled the tank that morning and it started running rough on that tank. Most likely water in the gas, it's snowed a lot here lately, and this problem isn't uncommon. I ran that tank out and now it's running much smoother. I also put dri-gas in the last fill up. I still plan on checking over everything when I get home. Appreciate it.
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Old 12-17-2013, 03:42 PM   #7
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I had that problem too. We had alot of steady rain, and i believe the inground tanks got water in them. Filled up at $2.85 a gallon at Kroger. Ran fine until I went to start it later, and it sputtered and idled low. I ended up putting some Redline SI-1 fuel system cleaner in, and it cleared it right up. I recommend running some through it to clean things up. It has a high level if PEA in it, and imo, one of the best cleaners out there. My upstream o2 sensor ended up going out shortly after the bad gas's incident.

2000 TJ 4.7 ATK Stroker/32rh
3" BDS front coils, 2.5" OME HD rear coils, 33x10.50 KM2's, 15x8 Soft 8's, Skyjacker Hydros, RE Superflex arms, SYE/CV

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