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89 xj loss of power/bogs

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Old 12-05-2013, 04:00 PM
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Default 89 xj loss of power/bogs
Hey guys, i have a 1989 jeep cherokee xj 4.0 with a automatic. It just recently started bogging. It bogs as long as its not full throttle. It also feels like its misfiring randomly sometimes. Any ideas on where to start?
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Old 12-05-2013, 04:22 PM
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Yep.

Ever replaced the plugs, wires, cap and rotor?

Click on the link below and do posts 1 and 3 for starters.
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Old 12-05-2013, 04:40 PM
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^ x2
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Old 12-05-2013, 06:29 PM
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Nope haven't replaced them, it's got 180k miles and I've only had this one since 173k. But I'll check it out tomorrow and let y'all know what I find. Thanks.
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Old 12-05-2013, 06:56 PM
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Gotta start with basics.
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Old 12-10-2013, 08:28 PM
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That wasn't it, still misfires and all. It loads up on fuel and dies. I'm starting to think it's the fuel pressure regulator. Going to check the fuel pressure tomorrow or Thursday.
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Old 12-10-2013, 08:30 PM
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Originally Posted by MDJosh90
That wasn't it, still misfires and all. It loads up on fuel and dies. I'm starting to think it's the fuel pressure regulator. Going to check the fuel pressure tomorrow or Thursday.
What "wasn't it"?

Loading up on fuel and dying is most likely MAP sensor issue. How's the hose/tube from the throttle body to the MAP? Is the MAP connector secure?
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Old 12-10-2013, 09:17 PM
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Ill check it out tomorrow in the daylight, the cap, rotor, plugs, wires didn't fix it or help it.
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Old 12-11-2013, 05:13 AM
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Originally Posted by MDJosh90
Ill check it out tomorrow in the daylight, the cap, rotor, plugs, wires didn't fix it or help it.
If you read posts 1 and 3 in my link, you would understand how critical those ground points are. Did you read them?
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Old 12-17-2013, 01:52 PM
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I can't see any link posted. I'm on here on my phone if that makes a difference.
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Old 12-17-2013, 02:10 PM
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It misfires and bogs anywhere over quarter throttle or under full throttle.
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Old 12-17-2013, 04:18 PM
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Originally Posted by MDJosh90
It misfires and bogs anywhere over quarter throttle or under full throttle.
Get on a PC then.
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Old 12-17-2013, 05:15 PM
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im having the same problem with my 90 let me know if you find out whats causing it and ill let you know if i find anything
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Old 12-18-2013, 11:53 AM
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A pc? It's obd1
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Old 12-18-2013, 12:42 PM
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He is talking about how you communicate with him not to your Jeep ,tour jeep is a renix
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