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Old 08-12-2010, 02:26 PM
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Yet another gremlin in the new rig

So, I hit a mud puddle the other day. Didn't chadwick it, but it was deep enough to make a splash ('bout 6 inches to a foot, if that). But, I also got gas from this one particular gas station that day... and I also had the AC on for the first time.

Three different things I did differently, and then this started happening: It starts bucking and missing when the engine lugs instead of bogging down and dealing with it. Instead of just dealing with it, it does this thing like the clutch is slipping... or like it has an interrupt in getting fuel. Buck-slam-buck-slam, then normal for a little bit, then buck-slam-buck-slam...

It also starts hard, which I've learned to work around by "priming" the fuel pump by turning the key three to four times before turning it all the way to start it. Took care of the hard start... but now this bucking thing.

Near as I can tell, it started some time after the mud puddle. I got gas at that station before the trek out, and it wasn't giving me any fits until we were already back in town (even 20 minutes after the puddle). This all took place last week. Yesterday, I filled it up again at that same station, and was having problems with the bucking in a much more severe way, instead of just bucking once and returning to normal, it would do it in all the gears, for about a minute at a time, then start up again a minute later. I also had the top up (due to imminent rain) and had the AC on, and the AC was making weird noises, that also seemed to coincide with the bucking. It was running fine, and then it was change sound, and the bucking would get worse, and then the sound would go back to normal after a minute and the bucking wouldn't be as bad (although, still present somewhat).

But yesterday it was also HUMID as all get-out. I know some vehicles, especially Fords, hate damp conditions, but are Jeeps known to do this as well? I once had an Aspire and an F-150 that would start to buck and cough like this every time it rained.

I don't *think* it's the clutch starting to slip, but it could be. It could also be a bad fuel issue, or maybe something with the injection system. Could the AC pump be dripping on something making it do that? I have no clue. Any advice or easy tests would be helpful so I don't end up stranded out in the woods on my next adventure.
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Old 08-12-2010, 02:32 PM   #2
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sounds like a bad spark plug wire.
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