2002 TJ 4.0L 142k Miles
Ever since I went to Silver Lake Last summer I started to notice that when I accelerate hard from Idle or at low speeds, until it gets up to moderate speeds (40+) it will make a high pitched noise, almost like a turbo sound. I've been having a hard time diagnosing where it is coming from, and from my knowledge, it isn't effecting anything, I am just mealy wondering if this is should be something to be concerned about or not and if anyone else has experienced this problem?
Way back in June when I went to SL after the trip and I got home my Check Engine light came on for my "Torque Converter" but eventually the code went away a day later and has yet to ever come on again. So I thought the noise may be from the transmission, but the light hasnt come on since. Not to mention, my fluid is fine, the trans stays at normal operating temps, and shifts perfectly.
I started thinking it may be my fuel pump, cause that was making a noise even at idle and was going, but I changed that out 3 days ago (Carter Assembly) and that idle noise has gone away. Yet when I hard accelerate, the noise persists.
I do have a K&N Cold Air Intake so I am beginning to wonder if this thing typically makes this turbo like sound noise when you hard accelerate?
Other than that, It doesnt seem to cause any problems, I was just curious if anyone else has experienced this noise and might know what the source is?