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Old 02-25-2012, 04:00 PM   #1
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1995 YJ Computer ???

Got a 1995 YJ with a 2.5L.. Auto transmission, had a new sending unit, fuel pump crank sensor installed, turns out it needed a ecu computer so the computer was replaced, now when driving it it will decelerate and accelerate tach will go from 2 to 2.5 back and fourth will step on the gas and accelerate and it is runs fine, any reason why this is accelerating and decelerating, anything I should be looking for.....Greatly appreciate any help or ideas!
PS....motor had also been previously tuned.

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Old 02-25-2012, 06:54 PM   #2
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Auto trannies are not a direct link between motor and drivetrain. They only run 80-90 percent efficiently until the converter locks in high gear. The 500 rpm fluctuation is normal and one reason I don't like them. Just make sure fluid is clean and full. Low or burnt fluid will also do that. Make sure it's clean and full and it should be fine.

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Old 02-25-2012, 08:10 PM   #3
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Fluids are Full and Clean....did not have this problem until the computer was replaced????????
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