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Old 03-21-2014, 06:50 PM   #1
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Brief Loss of Power While Driving?

This is the second time this has happened within about a week. Ill be driving up hill and suddenly it feels like the Jeep has a huge loss in horsepower. The engine is still running, and still pushing, but I begin to rapidly decelerate even if I push the pedal to the floor. It begins to ride rough though it usually only lasts 10 seconds or so and then begins working like normal.

My Specs:
'93
2.5L

It's crazy and I have no idea why. Any help would be fantastic!
Thanks in advance!

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Old 03-21-2014, 11:45 PM   #2
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Originally Posted by Huntsman180 View Post
This is the second time this has happened within about a week. Ill be driving up hill and suddenly it feels like the Jeep has a huge loss in horsepower. The engine is still running, and still pushing, but I begin to rapidly decelerate even if I push the pedal to the floor. It begins to ride rough though it usually only lasts 10 seconds or so and then begins working like normal. My Specs: '93 2.5L It's crazy and I have no idea why. Any help would be fantastic! Thanks in advance!
Any codes. Sounds like a TPS issue.

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Old 03-25-2014, 02:33 PM   #3
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Any codes. Sounds like a TPS issue.
Sadly it's not going to be that easy, I didn't have any codes other than a lone 33 - which translates to an A/C disconnection.

Source: http://www.wranglerboard.com/f9/obdi...reference-262/
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Old 03-25-2014, 04:45 PM   #4
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Mine turned out to be a fuel issue. Would drop down to near idle, then surge back to normal. Only did it under load. Never when parked. Fuel pump and filter for me.
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Old 03-26-2014, 10:04 AM   #5
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Hmmm, loss of power when on an incline. Is it fuel injected or carburated? If carb, then possible bad float assembly. Either, possible vacuum leak or fuel pump issue. possible transmission issue. You original post said that the engine is still running, but you have to press harder to maintain power, so the RPM's go up. correct?
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Old 03-26-2014, 10:06 AM   #6
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The rough running sounds mainly like a fuel issue
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Old 03-26-2014, 10:51 AM   #7
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Check your fuel pressure at key up (30-35psi?). You are probably going to have a pump wearing out or a plugged filter, but a pressure check should rule out the pump. Fuel filter is relatively cheap and easy place to start.
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Old 03-28-2014, 09:35 AM   #8
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Check your fuel pressure at key up (30-35psi?). You are probably going to have a pump wearing out or a plugged filter, but a pressure check should rule out the pump. Fuel filter is relatively cheap and easy place to start.
Oh lord, those fuel pumps and sending units are expensive as heck. How would I go about testing the pressure on it?
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Old 03-28-2014, 09:47 AM   #9
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You need a fuel pressure gage. There is a valve on your fuel rail that looks a little like a bigger version of the valve stem on your wheels.

You might be able to "rent" one from Autozone or something. If you are getting good pressure at key up and at idle, your pump is probably fine. A plugged filter will block flow first, so when flow is low, you should still get pressure.

A fuel filter should only be 10-15 bucks. So if you have a lot of miles, it's probably a good thing to change anyway.

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