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Old 12-17-2005, 10:32 AM   #1
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Unhappy Phantom Engine Problem

I have a '98 Wrangler 4.0 5 speed. Out of the blue it will lose power, spit, sputter, pop. I have to pull over and soon it is back to normal until the next time. I have new plugs, wires, cap, button. Dealer performed "de-carb" (wtf). They don't know the answer. No problems are logged into computer. Thanks for any help!

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Old 12-17-2005, 11:13 AM   #2
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MY YJ has been doing that for years. I'm not sure of the cause, but it only does it in cooler weather. I've never had to pull over, though. It usually recovers in a second or three.

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Old 12-17-2005, 11:16 AM   #3
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Interesting. I've got a friend who has a 98 TJ, 4.0 auto that sees the same thing. She says it only happens when she drives at steady highway speed for around 30 mins. Doesn't happen around town. Dealer is stumped as well.
Let us know if you figure it out.
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Old 12-17-2005, 11:31 AM   #4
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I have the same problem on my 99TJ with an auto. It happens under varying conditions. After the 1st of the year, we are going to put new o rings on the injectors and see if that helps...
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Old 12-19-2005, 06:06 AM   #5
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that happened to me in a car i used to have, i used to have to pull over on the highway. i tryed everything to fix the solution, after about a month of trying different things, it ended up being the fuel filter. i know they are supposed to last a lifetime but if you get a bad batch of gas, its gone. i would just check it, it may be, it may not be, but like i always say, its better to be safe than sorry.
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Old 12-19-2005, 04:11 PM   #6
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Quote:
Originally Posted by legacy
that happened to me in a car i used to have, i used to have to pull over on the highway. i tryed everything to fix the solution, after about a month of trying different things, it ended up being the fuel filter. i know they are supposed to last a lifetime but if you get a bad batch of gas, its gone. i would just check it, it may be, it may not be, but like i always say, its better to be safe than sorry.
Except for the fact that you have to drop the tank to do that....
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Old 12-20-2005, 12:52 PM   #7
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I have the Exact same issue. What happens is it pops, sputters, loses power. It usually happens after about 2-3 minutes of running, no matter what else is going on. Once in a while it doesn't do it at all. It happens for about a minute then it stops until the next time I drive it. It is seriously annoying. Sometimes the engine light will come on for days and then shut off but the problem has been there for about a year. The code says O2 sensor high voltage, but the O2 sensor was recently replaced.

It's a pain in the butt. When I go 4-wheelin I don't shut it off cause I don't want it to start sputtering when I am in the mud or something.

I wish I could find the source of the problem. It's obviously temperature related because after it warms up it stops doing it.
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Old 12-26-2005, 08:46 AM   #8
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Quote:
Originally Posted by Buster
I have the same problem on my 99TJ with an auto. It happens under varying conditions. After the 1st of the year, we are going to put new o rings on the injectors and see if that helps...

This might be close to a solution. I feel like my engine is getting too much gas and flooding out. Or not, who knows? It's very frustrating.
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Old 03-22-2006, 11:30 AM   #9
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May have fixed it !!

I think I've finally fixed the phantom problem (December '05 post) with my Jeep. It turned out to be the "upsteam" O2 sensor. Removed catalytic converter, did not help. Replaced "downstream" O2 sensor, did not help. It is running great now. Hope this helps someone else.
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Old 02-01-2011, 10:08 PM   #10
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I am having the same issue with my 94 4cyl wrangler. Just got a new tune up, O2 sensor and fuel regulator. Just had fuel guage placed on it and fuel pump is fine. What the heck is it...computer? Map sensor?
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Old 02-02-2011, 12:57 AM   #11
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bad ignition module
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Old 02-04-2011, 06:08 PM   #12
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Ignition Module going bad? hmmmm...it could be. Unusual for one to break down like that since they usually just go bad with no warning..but possibility. Gonna check computer first and if that 's not it...I will check the ignition module. Thanks!
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Old 02-04-2011, 06:46 PM   #13
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Quote:
Originally Posted by dhayes View Post
I have a '98 Wrangler 4.0 5 speed. Out of the blue it will lose power, spit, sputter, pop. I have to pull over and soon it is back to normal until the next time. I have new plugs, wires, cap, button. Dealer performed "de-carb" (wtf). They don't know the answer. No problems are logged into computer. Thanks for any help!
I had a very similar problem with my 1997 Sahara for literally a couple years. It only actually killed the engine once where I had to coast to the side of the road. Mostly it was really sporadic little blips/cuts in the power, it was really unsettling and was driving me nuts.

It turned out to be the Crank Position Sensor. The sensor is on the back of the transmission bell housing on the driver's side (you can see it with a flashlight between the firewall and the block). The cable runs up and then over to the bundle that lead to the PCM.

The cable on these apparently had a habit of making contact with the exhaust manifold and cooking off the insulation on early TJs. Mine was TOTALLY fried. No insulation on the wire pair for about 5 inches. That it worked at all was kind of crazy. Later models I think they pinned it up against the firewall. Swapped it out and all good.

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