coolcj7
Well-Known Member
- Joined
- Jul 17, 2019
- Threads
- 9
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- 66
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- Location
- New York City
- Vehicle(s)
- 2020 Wrangler Rubicon 2-door
- Vehicle Showcase
- 1
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- #1
Hello Experts! I really need some help solving this strange problem with my new JL. I have a 2-door, 6-speed MANUAL transmission, 3.6 engine, Rubicon with 4.10 gear ratio. I added 35" Milestar Patagonia tires. I did NOT change the speedometer settings in the internal computer after the new taller tires installation. Problem is that when I accelerate I hear this ringing (pinging, knocking, or whatever) sound from the valves. I try to keep the car above 2000 rpms, but it is not easy. I tried 89 octane fuel, but it didn't really help. Does anyone have a solution or a suggestion how to make the engine valve rattle sound go away? If I calibrate the internal computer with the new tire size, will that help? I know that is the solution with automatics, but mine is manual, so the car doesn't shift my gears. I tried riding on lower gears to keep the RPMs higher, but then my fuel mileage goes down the drain: it was 11 mpg when I looked at it yesterday! Horrendous!! Any help would be greatly appreciated. As a side note, yes, the 6th gear is non-existent with the 35s, I can barely get to 5th if ever.
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