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Old April 20th, 2013, 05:15 PM   #1
DJ1983
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Default will a 91 4.0 work in a 97?

i have a 97 xj that has a really bad knock and my uncle said i could have the H.O. motor he has if it will work, just need to know if it is a direct swap or if i have to swap the intakes or what i have to do. PM me please
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Old April 20th, 2013, 05:15 PM   #2
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the H.O motor is a 91
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Old April 20th, 2013, 06:01 PM   #3
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you're going to have to swap all the sensors at least.
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Old April 20th, 2013, 09:24 PM   #4
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do you know if the intake and manifolds can be swapped over?
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Old April 20th, 2013, 09:33 PM   #5
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Same intake because they're both HO motors
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Old April 20th, 2013, 10:08 PM   #6
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i thought they stopped doing HO motors after 95?
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Old April 21st, 2013, 12:10 AM   #7
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Same intake until 99
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Old April 21st, 2013, 06:55 PM   #8
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ok, im also wanting to add some power. what are some easy add-ons i can do to build more power? i have a throttle body spacer already
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Old April 21st, 2013, 08:32 PM   #9
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ok, im also wanting to add some power. what are some easy add-ons i can do to build more power? i have a throttle body spacer already
Cold air intake and exhaust
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Old April 21st, 2013, 08:33 PM   #10
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Old April 21st, 2013, 08:42 PM   #11
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A shift light and a wing
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Old April 21st, 2013, 08:44 PM   #12
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lol, i heard something about f-150 injectors? do those make that much of a difference?
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Old April 23rd, 2013, 01:01 PM   #13
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lol, i heard something about f-150 injectors? do those make that much of a difference?
I did the 5.0 injectors
They have a better spray pattern and my jeep seems to run richer so idk how I feel about them
And I also just did a performance ignition but the new coil was bad so I have to wait for a replacement to see if it helps
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Old April 23rd, 2013, 04:26 PM   #14
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most people stroke their 4.0 to make more power.
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