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General Forums => The Mess Hall => Topic started by: Trainman638 on May 21, 2010, 04:39:45 PM
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I'm having issues with my Mule (95YJ 2.5 125,000 miles). It starts and runs fine until it gets warmed-up then it feels like it's missing. An intermittent miss? Is that even possible? I've recently added elec. cooling fan, 170amp Alt, 19lb injectors, removed air box restriction, 4.0 TB, Accel coil and wires and new plugs gapped to .060. Since it still has the factory exhaust, I was thinking maybe the cat? Any help would be greatly appreciated. :puzzled:
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I'm having issues with my Mule (95YJ 2.5 125,000 miles). It starts and runs fine until it gets warmed-up then it feels like it's missing. An intermittent miss? Is that even possible? I've recently added elec. cooling fan, 170amp Alt, 19lb injectors, removed air box restriction, 4.0 TB, Accel coil and wires and new plugs gapped to .060. Since it still has the factory exhaust, I was thinking maybe the cat? Any help would be greatly appreciated. :puzzled:
Could be the cat, but I am wondering if the Accel coil can handle the .060" gap as well... I used to have that one, and I dont remember it handling such a gap.
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If the coil could'nt handle the gap, would'nt I have had this problem since I installed it? Or on start-up?
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If the coil could'nt handle the gap, would'nt I have had this problem since I installed it? Or on start-up?
why would you gap to .060 with stock ignition? - yes, that can be a problem (not saying that is the case but use stock gap instead to eliminate the possibility)
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It's a 40,000 volt coil.
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Can you feel it miss?
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Yes, I can feel the lack of power on the road and I can feel the motor struggle. It sure feels like a miss to me. BTW: I just pulled my plugs. They look good. Gap is set to .050, NOT .060 as I said earlier. As I recall, I chickened out going all the way to .060.
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But it's not a sudden lack of power? If it's an intermittent lack of power then that would suggest a misfire. This usually happens more when you rev it higher.
Overall lack of power would more then likely be something else.
If you think it might be the cat then remove it and look inside. You should be able to see if there is any damage.
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Power is fine (for a 2.5) until it warm up. Once it's warm it misses or stumbles. If I shut it off, and restart with the engine warm then it misses at start-up. Thanks for the help, I'll pull the cat tomorrow.
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It's a 40,000 volt coil.
ah, i missed the Accel coil part
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Power is fine (for a 2.5) until it warm up. Once it's warm it misses or stumbles. If I shut it off, and restart with the engine warm then it misses at start-up. Thanks for the help, I'll pull the cat tomorrow.
That doesn't sound like a exhaust issue. Maybe fuel pump going bad? Can't be vapor lock.
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Fuel pump? Only when the engine is warm? How would that be possible? I'm learning as I go. ::)
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Maybe a stuck injector? Bad injector? More things to check....this is that "learning curve thingy" ain't it? I wear my noob badge with honor :pirate:
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sometimes the pump gets hot in time too, so that might be the cause but i wouldn't rule out the cat
same goes for the coil though, once it gets hot you might get misfires - but the misfires are pretty distinct, so far sounds like you're losing power rather so that should point to fuel or exhaust or anything related to that (including sensors).
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Mine did that. Would start up just fine. I would leave my house on the way to work, and I'd get about 1 mile away, and it'd start to miss and sputter. Seemed like the more throttle I gave it, the worse it got. My problem was the Crank Position Sensor.
My jeep is a 93, 2.5L w/ around 200k miles.
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start it up and let it warm a little when you start to hear it strugglin , wiggle the injector plugs one at a time and see if you find one that makes it stop.Go slow at it,I had a similar issue and found that vibes were makin one of my injector plugs to not connect fully-zip ties to the rescue
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Thanks copperyj and b.hog. I'll check both of those either today or tomorrow. I'm adding a blitz can mount and a high-lift mount to the tire carrier today.
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And the prize goes to......b.hog! :clap: Injector plug loose on #2 cylinder. Zip ties ROCK! Thanks to all for the help. Much appreciated!! :bow:
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You know that should have brought up a CEL.
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And the prize goes to......b.hog! :clap: Injector plug loose on #2 cylinder. Zip ties ROCK! Thanks to all for the help. Much appreciated!! :bow:
:thumb: I ended up putting zips on all of them ,just to be sure :lol: