post #1 of Old 08-08-2009, 09:04 PM Thread Starter
Vulpine
Junior Member
 
Join Date: Aug 2007
Location: Maryland
Posts: 22
Why does the 3.6L V6 sound like a diesel?

While it sounds normal from outside the vehicle, accelerating down the highway sounds like a diesel engine or like it's knocking all the time when I'm driving. Is this normal for this particular engine, do I need to re-tune it, or just use higher octane gas?

Vulpine is offline  
post #2 of Old 08-08-2009, 09:35 PM
wrestlerobx
Registered User
2008 JK Wrangler 
 
Join Date: Apr 2008
Location: OBX is home, Ft Bragg is where Im stuck
Posts: 1,340
higher octane gas wont solve anything with this engine. as far as it soundin like a diesel im not really sure where you are coming from cuz mine and others that i have ridden in do not sound at all like a diesel

JEEP
wrestlerobx is offline  
post #3 of Old 08-09-2009, 06:36 AM
jay-h
Registered User
1989 YJ Wrangler 
 
Join Date: Dec 2006
Posts: 5,027
Quote:
Originally Posted by Vulpine View Post
While it sounds normal from outside the vehicle, accelerating down the highway sounds like a diesel engine or like it's knocking all the time when I'm driving. Is this normal for this particular engine, do I need to re-tune it, or just use higher octane gas?
It should not be knocking if that is indeed what you are hearing. Knocking causes damage.

As a test, fill it up with the highest octane you can get. If it improves, there is something wrong with your injection/ignition system and it should be checked. If there is no change, than you might be hearing something other than knocking. Have an experienced person listen.
jay-h is offline  
post #4 of Old 08-09-2009, 07:00 AM
brupard
Registered User
2008 JK Wrangler 
 
Join Date: Oct 2008
Location: Texas
Posts: 3
I don't know but if your able to figure it out pls let me know. Mine's done it since early on but the dealership couldn't duplicate the issue when I took it in.
brupard is offline  
post #5 of Old 08-09-2009, 07:34 AM
SilvRSpeedX3
Registered User
2008 JK Wrangler 
 
Join Date: Jun 2006
Location: conectycut
Posts: 304
well if its like mine, it might be the engine pinging. I have tried different gases and gas stations now its going to the dealer on monday

2k8 Black X unlimited
Black Jeep Society
SilvRSpeedX3 is offline  
post #6 of Old 08-09-2009, 02:56 PM
Ancient Mariner
Registered User
 
Ancient Mariner's Avatar
2012 JK Wrangler 
 
Join Date: Mar 2007
Location: Wenatchee
Posts: 286
Similar Problem

I've had my Jeep for over two years and it ran fine. Suddenly I keep hearing the pre-ignition pinging in the last few months. I did switch from Shell back to Costco and it is a lot better. I think it is the fuel the methanol mix. It only started when I purposely went to the Shell station in town. Power and mileage are good. ????

'12 X 2dr 6spd Freedom Top RED
NITTO Trail Grappler 285-70-17R" on Fuel Hostage wheels - 2" BB lift.
IPF 55w Sport Lights on QuadraTech Windshield mounts. IPF out front on light bar.
Ancient Mariner is offline  
post #7 of Old 08-09-2009, 04:44 PM
rirrgang
Registered User
2007 JK Wrangler 
 
Join Date: Aug 2007
Location: San Jose
Posts: 2,167
It's your vivid imagination. This engine makes no noise as a requirement by minivan standards. If it is, take it in to the dealer.

-Rick
07 Sahara Unlimited
rirrgang is offline  
post #8 of Old 08-09-2009, 05:41 PM
GPV
Registered User
2008 JK Wrangler 
 
Join Date: Jul 2008
Location: Maine
Posts: 933
Quote:
Originally Posted by rirrgang View Post
It's your vivid imagination. This engine makes no noise as a requirement by minivan standards. If it is, take it in to the dealer.
X2 AND if you have a JK you have a 3.8L engine..............

Sean

2008 Jeep JK Rubicon Unlimited (Bought for Wife)
2007 GMC 2500HD Duramax (Work Horse)
1982 Honda CB 900F Supersport
2001 Honda RC51
GPV is offline  
post #9 of Old 08-09-2009, 06:29 PM
JkFuriousd
Registered User
2010 JK Wrangler 
 
Join Date: May 2009
Location: harmony NC
Posts: 345
Quote:
Originally Posted by Ancient Mariner View Post
I've had my Jeep for over two years and it ran fine. Suddenly I keep hearing the pre-ignition pinging in the last few months. I did switch from Shell back to Costco and it is a lot better. I think it is the fuel the methanol mix. It only started when I purposely went to the Shell station in town. Power and mileage are good. ????
Wow Costco gas FIXED the problem. never thought i would hear that!

2010 Rubicon 2dr
JkFuriousd is offline  
post #10 of Old 08-09-2009, 08:15 PM
RRCP08JK
Registered User
2010 JK Wrangler 
 
Join Date: Jun 2009
Location: Planet Earth
Posts: 171
Quote:
Originally Posted by Vulpine View Post
While it sounds normal from outside the vehicle, accelerating down the highway sounds like a diesel engine or like it's knocking all the time when I'm driving. Is this normal for this particular engine, do I need to re-tune it, or just use higher octane gas?
Maybe you have an exhaust leak somewhere? Check it out. This engine sounds nothing like a diesel.....I wish it did and was a diesel though!

"It is the spirit of men who follow and of the man who leads that gains the victory" ~ George S. Patton
RRCP08JK is offline  
post #11 of Old 08-10-2009, 07:08 PM
daggo66
Registered User
2009 JK Wrangler 
 
Join Date: Jul 2009
Location: NJ exile living in Baltimore
Posts: 1,136
Quote:
Originally Posted by Vulpine View Post
While it sounds normal from outside the vehicle, accelerating down the highway sounds like a diesel engine or like it's knocking all the time when I'm driving. Is this normal for this particular engine, do I need to re-tune it, or just use higher octane gas?
I know exactly what you're talking about. It's not egine knock or ping. It's very faint and it's the muffler sound at low rpm when starting out in 1st gear. It's more reminiscent of a diesel sound than a diesel sound.
daggo66 is offline  
post #12 of Old 08-11-2009, 09:35 PM
ChrisRobinette
Registered User
2009 JK Wrangler 
 
Join Date: Aug 2009
Location: Manhattan, KS
Posts: 35
My engine is noisy as hell when I have the doors off. I haven't heard anything out of the ordinary, it just sounds like a noisy engine when I can actually hear it.
ChrisRobinette is offline  
post #13 of Old 08-12-2009, 07:34 AM
iambeekay
Registered User
2007 JK Wrangler 
 
Join Date: Jul 2007
Location: Rowley MA
Posts: 56
get video of it and bring it to the dealer.
I got the runaround on a gastank issue, they said they could not duplicate it and sent me home (the dud didnt even fill the tank, he put 5 bucks in it and said no issue, it was at 1/4 tank!). I popped out the phonecam and recorded the gas blasting out of the tank fill neck when filled up. They watched the video and fixed it instantly (with a new gas tank).

I know this is hard while driving (wind noise etc) but this will help in the diagnosis.

My Jeep has no crazy loud noises as noted.
bk

Bill
2007 Jeep Wrangler Sahara 4dr
Black, Power, MyGig
2001 Audi A4 1.8 TQMS Silver
2004 Bigfoot 29SL Ford F450 V10 4 Season RV
1974 Harley Sportster XLCH
iambeekay is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Knocking/Diesel sound on my 2.5L engine r_unda TJ Wrangler Technical Forum 4 09-28-2009 12:06 PM
Diesel conversions/crate diesel engines for a TJ 4x4VT TJ Wrangler Technical Forum 3 06-04-2009 03:44 AM
jEEP GIVE US THE DIESEL HECK IF THE hUMMER H3 HAD A SMALL DIESEL IT WOULD BE NUMBER 1 4.0v8eater JK Wrangler Technical Forum 22 08-02-2006 12:10 PM
Does your Jeep sound like a diesel?? what to fix it??? Why J? YJ Wrangler Technical Forum 20 06-12-2006 08:07 PM
Bad vibration and diesel sound? 94Wrangler4.0 YJ Wrangler Technical Forum 5 02-09-2005 06:57 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome