Quick question...2006 TJ6 speed manual4.0 liter with I-631/10.50/15 BFGsWhen moving along at highway speeds or at lower speeds, does anyoneelse's Wrangler engine sound like a 'rattlesnake' is in there? I amnot sure if this is pinging or simply just the normal sound of themotor. Keep in mind that I do not use my 6th gear on the highway dueto the 31s. I am travelling along at approximately 65 mph and runningabout 2400-2500 rpms when this sound occurs. If I back off theaccelerator and get to about 62-63 mph, the sound stops. It's not ametallic type sound. Just a 'rattling' or 'purring' type sound. Anyinsight?

Sorry but I forgot to add the following....Since I have upgraded from 28s to 31s, can that cause the engine tolug or ping? I generally keep the RPM's around 2200-2400 in 5th gear(I have a 6 speed). In the higher gears after the engine is warm andmainly while going uphill (little or big), I get this noise on thepassenger side that sounds VERY similar to the soft top side window'pinging' against the metal support bow when the wind blows. I can'tquite distinguish if that's it, or if the engine is pinging because Iam not 100% sure whether it's coming from the front or the back.It'sa high-pitched noise. It is NOT rhythmic or steady, but rather comesand goes intermittently. This noise does NOT happen at city/townspeeds of 50 mph or lower. I ran a tank of 89 through her, and itseemed to be drastically reduced after 1/4 of the tank was used andfor the rest of the 3/4 of the tank. I have now refilled again withthe 89 and the noise is back. I have not used 1/4 of the tank yet,soI don't...

Well then drop a gear or have pre-ignition detonation damage: God Bless America, Bill O|||||||Omailto:

TO PING OR NOT TO PING?

Sep 24, 2007 44 Replies

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L.W. (Bill) Hughes III 18 years ago

Well then drop a gear or have pre-ignition detonation damage:

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God Bless America, Bill O|||||||Omailto: snipped-for-privacy@aol.com

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Tracie 18 years ago

damage:

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God Bless America, Bill O|||||||O> mailto: snipped-for-privacy@aol.comhttp://www.billhughes.com/>

Thanks Dave. I don't think it's pinging either the more I listen and pay attention to the engine sounds, and from what everyone here has told me. I think it's just the 'normal' engine sounds from that particular type of engine. This is my first Wrangler (first Jeep product too for that matter), and I am still trying to adjust to all the different sounds/noises that she makes without freaking out over it first. Which is why I am writing in to this post before taking every little 'problem' to the dealer. Thanks everyone for all the helpful advice. : D

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noneofyourbusiness 18 years ago

[snip]

I bought my first Jeep about 2 years ago, and the 4.0 makes such a racket I thought someone slipped a diesel under the hood ;-)

(clackity clack clackity clack clackity clack clackity clack...)

...

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Dave Milne 18 years ago

Know what you mean. It sounds like it is about to explode when it gets over

3000 rpm. Its quite a feat to construct an I6 and make it sound that rough. Fortunately, it pulls like a train, lasts forever and as it never seems to shake itself to bits, so it doesn't matter !

Dave Milne, Scotland

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Tracie 18 years ago

You said it. Especially when starting her up first thing in the morning with the defroster on. Holy cow does she roar! After a couple of minutes, all is fine again. : D

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