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Old 01-15-2012, 03:42 PM   #1
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YJ cutting off when hitting puddles?

So I went out mudding with the Raleigh guys yesterday and the dang jeep just keeps cutting off after I hit a puddle of water and stop... as long as I keep going, it runs fine.

So I have to let it sit for about 5 minutes and then try to crank it back up with the gas all the way pressed and slowly letting the clutch out, it eventually starts after about a minute of doing this

When it turns off, it doesn't jerk forward, the engine just seems to die down and cut off.

Any ideas? We checked the distributor cap, air filter, covered the fuse relay box.

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Old 01-15-2012, 04:12 PM   #2
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Carb'd or EFI engine?

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Old 01-15-2012, 04:15 PM   #3
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it's a 1994, so EFI... 2.5L
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Old 01-15-2012, 04:20 PM   #4
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Look for a short in the wiring to the fuel tank, possible grounding out to the frame.
I'll think for a moment and edit this.
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Old 01-15-2012, 04:24 PM   #5
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Quote:
Originally Posted by TreeClimber1 View Post
Look for a short in the wiring to the fuel tank, possible grounding out to the frame.
I'll think for a moment and edit this.
I believe it's safe to say that this only happens when I hit a puddle of water or soupy mud, and it splashes everywhere..
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Old 01-15-2012, 04:48 PM   #6
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Water, or wet mud, spashing underneath isn't going to create enough drag on the engine to cause it to die. Therefore, it's got to be that the water is creating either an electrical short -or- causing a disruption on the ability of the engine to breathe. At least, that's where I'd start looking, based upon your symptons as described.

Other items, which may also come into play, but don't fit all your descriptors are a clogged catalytic convertor, bad fuel filter, weak fuel pump, bad fuel filter screen in the tank, low fuel level, clogged air filter, weak or grounding out spark plug wires, collapsing fuel hoses (from the hard line to the fuel rail), and I'm sure others.
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Old 01-16-2012, 06:48 AM   #7
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I had a similar issue with my 4.2 carb and found that water / mud was getting inside my distributer cap, sealed with some silicone and problem solved , just a PITA to change the cap next time.
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Old 01-16-2012, 08:39 AM   #8
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I would lean towards a problem with the Crank Position Sensor wiring.

Expose wiring gets wet, sends wierd signals to the computer, and engine shuts down because it doesn't know when to throw a spark.
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Old 01-16-2012, 12:07 PM   #9
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Quote:
Originally Posted by jsn View Post
So I went out mudding with the Raleigh guys yesterday and the dang jeep just keeps cutting off after I hit a puddle of water and stop... as long as I keep going, it runs fine.

So I have to let it sit for about 5 minutes and then try to crank it back up with the gas all the way pressed and slowly letting the clutch out, it eventually starts after about a minute of doing this

When it turns off, it doesn't jerk forward, the engine just seems to die down and cut off.

Any ideas? We checked the distributor cap, air filter, covered the fuse relay box.
Slowly letting the clutch out??
If you have to hold the throttle open to start I would look at your plug wire/boots and coil wire/boots and dist cap along with the cps wires
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Old 01-16-2012, 11:29 PM   #10
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I had the same problem a couple of days ago, it was actually the ignition coil. Make sure you have some di-electric grease on all of your electronic components (fuses, relays, sparkplug wires, silicone around distributor cap). It works great to keep dirt, water, mud etc etc out of all your electronic conections.
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Old 01-17-2012, 12:49 AM   #11
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Do a FULL tuneup, and that includes replacing your CPS as well as checking all of the wiring for it.

Since it only happens when you go through puddles, i'd imagine it'd be wiring on the underside, and the CPS is right down there.

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