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Old 05-25-2012, 01:57 AM   #1
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Talking Loss of power...

having some serious issues with a occasional loss of power with a sputtering but when I switch gears I can get the power back.

Really Killing me.. Not sure where to start... Fuel, Air, and Spark are the base issues that I look to but how to trouble shoot is what i really need to know.

Any help will be GREAT thank you BTW it is a 87 YJ with the 4.2

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Old 05-25-2012, 12:06 PM   #2
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Bump for help?

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Old 05-25-2012, 12:27 PM   #3
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The usual suspects are spark; coil or Ignition Control Module, carb., or clogged fuel filter/bad fuel pump. I would change the fuel filter anyway and make sure you have spark, even though if it's the module it can be intermittent. When I had that problem I swapped out the coil and ICM. It was the module.
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Old 05-25-2012, 09:54 PM   #4
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Had the same issue mine was a old fuel pump giving up on me
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Old 05-25-2012, 11:54 PM   #5
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The filter is new, and its carb so no fuel pump that I know of..

Going to check the fuel and spark and air but it doesn't make since why this problem wouldn't be constant.
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Old 05-26-2012, 01:24 PM   #6
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The only way you won't have a fuel pump is if the gas tank is located higher than the carb......you have one, trust me
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Old 05-26-2012, 01:32 PM   #7
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Quote:
Originally Posted by Bluegrass View Post
The filter is new, and its carb so no fuel pump that I know of..
Looks like its time to take your Jeep to a repair shop...

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Old 05-26-2012, 02:49 PM   #8
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The filter is new, and its carb so no fuel pump that I know of..

Going to check the fuel and spark and air but it doesn't make since why this problem wouldn't be constant.
Chances are it's the Ignition Control Module acting up. Your fuel pump is mechanical on the passenger side of the engine compartment. You'll see it. Follow the fuel line from the carb. You should take it to a shop.
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Old 05-29-2012, 12:29 AM   #9
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I am pretty sure I can do a fuel pump, just did a nutter bypass, fuel filter, distributor cap and rotor, now I guess I will change the plug wires and then attack the pump.. I had not looked into the pump due to a friend telling me that I didn't have one.

I am still learning on how to on my Jeep and I don't plan on paying someone else to do what i am able to do. Thanks for the advice on what to look for.

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4.2 , 87 wrangler , power issue , power loss , wranger

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