xj884x4
Active Member
- First Name
- Jordan
- Joined
- Sep 26, 2018
- Threads
- 15
- Messages
- 43
- Reaction score
- 19
- Location
- Greensboro, NC
- Vehicle(s)
- 78CJ5, 88XJ, 97ZJ, 02WJ, 04WJ, 05TJ, 19JLUS
- Thread starter
- #1
I have 8.8k on my 2019 JLUS with manual trans. Since day 1, when shifting from 1st to 2nd and getting back on the gas with clutch pedal all the way back up, i get this valve rattle sound, kinda sounds like a diesel engine idling, but only does it for a fraction of a second until the load is back on the engine. Also does it in 3rd gear. Now its much louder and more frequent than the first few thousand miles. Oddly, does not happen in first gear unless you are getting ready to truly stall. On my 1 to 2 shift, the noise occurs anytime the engine RPM is below 1600 when in 2nd gear, so its not stalling or starving for fuel. This condition is most common in neighborhoods, especially after you come to a stop sign or maybe slow down to round a corner. It isn't shift related, as I can stay in 2nd gear, tap the gas, and make it do it every time the engine is below 1600rpm. I have a 6spd TJ, 3spd CJ, and none of them make this knocking/preignition noise at ANY rpm. I captured audio of it and posted in this thread. The audio is me staying in 2nd gear, get on and off the gas (not stomping, just normal acceleration). The harder you press the gas after being off of it, the louder the noise is. Audio isn't perfect but you can hear it every 4-5 seconds in the sound clip. It's actually quite loud in person, and I can hear it well with windows up and windows down its super loud. very annoying and disappointed. I'm headed to dealership next week for various other issues (squeeling brakes 100% of the time hot or cold, ESS non functional b/c of clutch switch (2nd attempt to fix). I find the manual driveline to be quite sloppy too at highway, if you are off the gas and get back in it, there's a huge clunk from taking up all the slack. I digress - any thoughts on the noise? Running 87 octane, name brands.
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