Wrangler Rubicon JLU 3.6 engine pre-detonation

Hau82

Active Member
First Name
Alfredo
Joined
Jun 3, 2018
Messages
30
Reaction score
27
Location
San Diego
Vehicle(s)
2018 Jeep Wrangler JL Rubicon unlimited
hi guys,

Only have 2,200 miles and about a month ago I started hearing some knocking/pinging noise in my engine particularly between 2nd and 3rd gear at about 2k to 2.8k rpms more noticeable when going uphill or from a stop when taking off in 2nd gear (auto tranny) , I blamed the fuel so I tried a new brand and higher octane to see if the sound goes away. So after a month of testing, the noise has become more noticeable and I'm starting to worry about something getting broken. Does anyone have had this problem and got it solved?
Advertisement

 

JeepCares

Well-Known Member
Joined
Feb 1, 2018
Messages
4,639
Reaction score
2,292
Location
Auburn Hills, MI
Vehicle(s)
JL
hi guys,

Only have 2,200 miles and about a month ago I started hearing some knocking/pinging noise in my engine particularly between 2nd and 3rd gear at about 2k to 2.8k rpms more noticeable when going uphill or from a stop when taking off in 2nd gear (auto tranny) , I blamed the fuel so I tried a new brand and higher octane to see if the sound goes away. So after a month of testing, the noise has become more noticeable and I'm starting to worry about something getting broken. Does anyone have had this problem and got it solved?
Hi Hau82,

We are terribly sorry to hear that you have this concern with your new JL. Have you brought this to the attention of your dealer? Please send us a PM with your VIN and mileage if you are in need of additional assistance.

Darlene
Jeep Social Care Specialist
 

intentsrig

Well-Known Member
First Name
Brian
Joined
Apr 8, 2018
Messages
1,097
Reaction score
953
Location
California
Vehicle(s)
JLU Sporticon
hi guys,

Only have 2,200 miles and about a month ago I started hearing some knocking/pinging noise in my engine particularly between 2nd and 3rd gear at about 2k to 2.8k rpms more noticeable when going uphill or from a stop when taking off in 2nd gear (auto tranny) , I blamed the fuel so I tried a new brand and higher octane to see if the sound goes away. So after a month of testing, the noise has become more noticeable and I'm starting to worry about something getting broken. Does anyone have had this problem and got it solved?
Yeah I have heard the same. Similar to the sound my 3.8 made and that was considered “normal” for the 3.8 according to the dealer
 
OP
OP
Hau82

Hau82

Active Member
First Name
Alfredo
Joined
Jun 3, 2018
Messages
30
Reaction score
27
Location
San Diego
Vehicle(s)
2018 Jeep Wrangler JL Rubicon unlimited
So far this is what I have done,

I plugged my obd2 scanner to my Jl port and got a green light (everything good), I pressed the red button of my scanner to “erase” codes (even dough there are no codes) this will erase all the sensors data stored in the ecu forcing it to relearn. So far everything seems back to normal, still need to drive a few more miles to complete the ecu relearn process, a soon as I get the obd2 green light I’ll post update info.
 

Ruby Jack

Well-Known Member
Joined
Mar 20, 2018
Messages
284
Reaction score
244
Location
CT
Vehicle(s)
'18 JLUR
I wouldn't try doing anything yourself. Just take it to the dealership and let them handle it. You have 3 (or was it 5?) years of powertrain warranty, might as well make use of it.
 

Rockmaninoff

Banned
Banned
Banned
Joined
Sep 1, 2016
Messages
375
Reaction score
178
Location
Melbourne, Australia
Website
sophistijeep.blogspot.com
Vehicle(s)
MY2014 JKU Overland (RHD) A/T, Mercedes E-class MY2017
hi guys,

Only have 2,200 miles and about a month ago I started hearing some knocking/pinging noise in my engine particularly between 2nd and 3rd gear at about 2k to 2.8k rpms more noticeable when going uphill or from a stop when taking off in 2nd gear (auto tranny) , I blamed the fuel so I tried a new brand and higher octane to see if the sound goes away. So after a month of testing, the noise has become more noticeable and I'm starting to worry about something getting broken. Does anyone have had this problem and got it solved?
In the JK manual I remember it saying that some light pinging at low rpms is normal.
 

mwilk012

Well-Known Member
Joined
Mar 10, 2018
Messages
5,124
Reaction score
4,752
Location
Oklahoma
Vehicle(s)
2018 Ocean Blue JLU Rubicon
Have you had an oil change since receiving you jeep? I have seen others who used an aftermarket oil filter reporting pinging/knocking afterwards.
 

That One Guy

Well-Known Member
First Name
Ryan
Joined
Feb 8, 2018
Messages
1,168
Reaction score
1,408
Location
Utah
Vehicle(s)
2004 Honda Accord coupe, V6 6-speed manual; ordered 2018 JL Sport 6MT with A/C and anti-spin. D status.
Have you tried using midgrade or premium fuel?
 

DanW

Well-Known Member
First Name
Dan
Joined
Mar 2, 2017
Messages
7,979
Reaction score
10,320
Location
Indiana
Vehicle(s)
21 JLUR, 18JLUR, 08JKUR, 15 Renegade, 04 WJ
Vehicle Showcase
2
My 3.8 in my JK pings once in awhile. When it starts, I'll give it a couple Italian tune-ups and run a tank or two of V-power through it and it clears up for 5 or 6 thousand miles. If I run 89 octane all the time it won't do it, but I don't want to spend that money all the time. Worn spark plugs have also contributed, so I change them out about every 40k, and that helps.

I'm sure slight pinging is normal, but I don't like it. My JL isn't doing it, so far, but when it does, it will get The Italian Job and a dose of V-power.

I also ALWAYS run Top Tier rated gasoline, in both Jeeps. My JK will ping much more after a few tanks of cheap gas that is not Top Tier rated.

It sounds like OP found a solution that's cheap and works. Thanks for sharing it!
 

Biscuit

Well-Known Member
Joined
May 5, 2018
Messages
544
Reaction score
561
Location
Northeast Ohio
Vehicle(s)
2018 JLU Sport
Occupation
Retired
Top Tier is, IMO, mostly a marketing gimick. Even opinions of knowledgeable folks are mixed.

Gas brands can participate and get a TOP TIER license if they meet certain standards, which includes performance tests for intake valve and combustion chamber deposits, fuel injector fouling, and intake valve sticking. Additive manufacturers pay for the testing, the cost of which varies from year to year, while gasoline companies pay an annual fee based on the number of stations it operates to participate in the program. In short, Top Tier's first priority is to generate revenue from testing costs and licensing fees.

OTOH, nowdays you'd have to search pretty hard to find gas that isn't so licensed - even the so-called "cheap" fuel retailers. Furthermore, all fuel producers share pipelines, distribution terminals and transportation contractors, so it's all the same gas regardless of brand, although additive packages may vary slightly. But then again, practically all of those fuel producers get their additives from a single supplier.
 

mwilk012

Well-Known Member
Joined
Mar 10, 2018
Messages
5,124
Reaction score
4,752
Location
Oklahoma
Vehicle(s)
2018 Ocean Blue JLU Rubicon
Top Tier is, IMO, mostly a marketing gimick. Even opinions of knowledgeable folks are mixed.

Gas brands can participate and get a TOP TIER license if they meet certain standards, which includes performance tests for intake valve and combustion chamber deposits, fuel injector fouling, and intake valve sticking. Additive manufacturers pay for the testing, the cost of which varies from year to year, while gasoline companies pay an annual fee based on the number of stations it operates to participate in the program. In short, Top Tier's first priority is to generate revenue from testing costs and licensing fees.

OTOH, nowdays you'd have to search pretty hard to find gas that isn't so licensed - even the so-called "cheap" fuel retailers. Furthermore, all fuel producers share pipelines, distribution terminals and transportation contractors, so it's all the same gas regardless of brand, although additive packages may vary slightly. But then again, practically all of those fuel producers get their additives from a single supplier.
7/11 is still willing to sell you low quality gas if that's what you're into. They're pretty widespread.
 

DanW

Well-Known Member
First Name
Dan
Joined
Mar 2, 2017
Messages
7,979
Reaction score
10,320
Location
Indiana
Vehicle(s)
21 JLUR, 18JLUR, 08JKUR, 15 Renegade, 04 WJ
Vehicle Showcase
2
Talk to someone who works at a fuel distribution center where they handle the additives. They'll tell you that Top Tier gas gets better ad pacs and that they are tested to ensure they meet the standard. More and more gasoline sellers are getting the certification because more and more customers are looking for it. Around my area, all the fuel comes from the same distribution center. The additive packages are what differentiates them. The bigger brands, such as Shell and Mobil, have thier own proprietary add pac. Most of the others go with packages offered by the distributor, which range from the basic one that meets the minimum EPA standard, and various levels of upgrade, including a level that is certified as meeting Top Tier. In this case, it is simply more additive per set volume of gasoline, or less, depending on what the customer wants.

Run what you want. I'm not putting cheap crap that meets the minimum standard for detergent in my $50k Jeep. My JK 3.8 is sensitive to deposit build up and will ping and knock like crazy after only 3 or 4 tanks of the stuff, getting progressively worse. I've learned that over many, many miles with it. It takes MUCH longer for the build up and pinging to occur on Top Tier gas, which for me, 90% of the time is Shell.
 

DanW

Well-Known Member
First Name
Dan
Joined
Mar 2, 2017
Messages
7,979
Reaction score
10,320
Location
Indiana
Vehicle(s)
21 JLUR, 18JLUR, 08JKUR, 15 Renegade, 04 WJ
Vehicle Showcase
2
7/11 is still willing to sell you low quality gas if that's what you're into. They're pretty widespread.
So will Kroger and Speedway and countless independent stations.
 

islandtees

Well-Known Member
First Name
gary
Joined
Mar 6, 2018
Messages
742
Reaction score
704
Location
florida
Vehicle(s)
2018 rubicon jl
Talk to someone who works at a fuel distribution center where they handle the additives. They'll tell you that Top Tier gas gets better ad pacs and that they are tested to ensure they meet the standard. More and more gasoline sellers are getting the certification because more and more customers are looking for it. Around my area, all the fuel comes from the same distribution center. The additive packages are what differentiates them. The bigger brands, such as Shell and Mobil, have thier own proprietary add pac. Most of the others go with packages offered by the distributor, which range from the basic one that meets the minimum EPA standard, and various levels of upgrade, including a level that is certified as meeting Top Tier. In this case, it is simply more additive per set volume of gasoline, or less, depending on what the customer wants.

Run what you want. I'm not putting cheap crap that meets the minimum standard for detergent in my $50k Jeep. My JK 3.8 is sensitive to deposit build up and will ping and knock like crazy after only 3 or 4 tanks of the stuff, getting progressively worse. I've learned that over many, many miles with it. It takes MUCH longer for the build up and pinging to occur on Top Tier gas, which for me, 90% of the time is Shell.
The only name brand by me is Sunoco. I would think they use a better pac?
 

Jeepsterfreak

Well-Known Member
Joined
Jan 2, 2017
Messages
2,147
Reaction score
1,284
Location
USA
Vehicle(s)
Honda, Future JLU
So will Kroger and Speedway and countless independent stations.
Sams Club also. Costco is now top tier. Thinking about switching my membership just for the gas. Philips 66 is dominant in my area. Unfortunately no Chevron stations near me.
 
Advertisement

Chrysler Factory Warranty
 
Advertisement
Top