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Old 12-15-2013, 03:46 PM   #1
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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.

Thanks

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Old 12-15-2013, 04:23 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, 04:32 PM   #3
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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, 04:37 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!
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Old 12-15-2013, 05:46 PM   #5
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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, 10:38 AM   #6
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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, 02:42 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.

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