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Unread 03-16-2012, 10:56 AM   #1
ToniF303
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Stepping on the gas & hearing a noise

When I step on the gas (after the Jeep is warmed up) I hear a metal like noise. But the longer I step on the gas, the noise goes away. Until l stop the car and then again, I hear the noise when I step on the gas. This has been going on for about 10,000 miles, and it's at 62,000 miles now. 2007 JK 4 door

Any ideas???

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Unread 03-16-2012, 12:42 PM   #2
LIJeepJC
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Well, considering the mileage you have experienced this, it's not very serious or you would have experienced a breakdown at some point. It's hard to diagnose "noise". Especially since I can't hear it from where I am. I would think that it's no big deal, and that I wouldn't worry about it.
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Unread 03-16-2012, 01:06 PM   #3
ronjenx
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Quote:
Originally Posted by ToniF303 View Post
When I step on the gas (after the Jeep is warmed up) I hear a metal like noise. But the longer I step on the gas, the noise goes away. Until l stop the car and then again, I hear the noise when I step on the gas. This has been going on for about 10,000 miles, and it's at 62,000 miles now. 2007 JK 4 door

Any ideas???
Manual? Or auto?

The noise goes away as the Jeep picks up speed?

Could be pinging from expecting too much in too high a gear.
If that's the case, you need to look into it.

Could be as simple as some tin rattling underneath, too.
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Unread 03-16-2012, 03:08 PM   #4
LIJeepJC
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Quote:
Originally Posted by ronjenx

Manual? Or auto?

The noise goes away as the Jeep picks up speed?

Could be pinging from expecting too much in too high a gear.
If that's the case, you need to look into it.

Could be as simple as some tin rattling underneath, too.
I was thinking pinging too, but shouldn't the computer compensate?
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Unread 03-16-2012, 03:27 PM   #5
propped1
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Its the heat shield above the muffler... The welds suck. They break. Costs me $100 at the dealer to find that out. Happened twice. I just bent it back myself and saved the money the second time. The metal sound is the shield vibrating on the exhaust when you accel. Same thing happened to me. Just bend it back. If you have a welder you can more permanently fix it. I dont.
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Unread 03-16-2012, 03:48 PM   #6
paul olllllllo
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Originally Posted by propped1 View Post
Its the heat shield above the muffler... The welds suck. They break. Costs me $100 at the dealer to find that out. Happened twice. I just bent it back myself and saved the money the second time. The metal sound is the shield vibrating on the exhaust when you accel. Same thing happened to me. Just bend it back. If you have a welder you can more permanently fix it. I dont.
Would a high temp silicone kind of "glue" it in place?
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Unread 03-16-2012, 04:07 PM   #7
propped1
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never tried... let me know how it works out
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Unread 03-16-2012, 04:07 PM   #8
nyrangersfan19
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Not necessarily the heat shield. My JK has AWFUL pinging.

OP: Is the noise happening at a certain RPM EACH time? If so, it might be some exhaust resonance, like the heat shield mentioned above. If not, it could be pinging. (spark knock)
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Unread 03-16-2012, 04:09 PM   #9
LIJeepJC
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Quote:
Originally Posted by paul olllllllo

Would a high temp silicone kind of "glue" it in place?
If its the catalyst than not sure if the glue can stand that heat...
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Unread 03-16-2012, 05:13 PM   #10
ronjenx
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I was thinking pinging too, but shouldn't the computer compensate?
The computer's ability to reduce pinging has its limits.
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Unread 03-18-2012, 02:06 PM   #11
ToniF303
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The Jeep is an Auto. Thanks for your ideas.
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Unread 03-18-2012, 02:07 PM   #12
ToniF303
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Wow... thanks for the idea. Could be the problem. We'll check it out.
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Unread 03-18-2012, 02:10 PM   #13
ToniF303
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Originally Posted by nyrangersfan19 View Post
Not necessarily the heat shield. My JK has AWFUL pinging.

OP: Is the noise happening at a certain RPM EACH time? If so, it might be some exhaust resonance, like the heat shield mentioned above. If not, it could be pinging. (spark knock)

I just seem to hear the noise when I first step on the gas. I'm starting to hear it more often when I'm going faster and step on the gas. That's a girl answer, huh?!!
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Unread 03-19-2012, 06:42 AM   #14
nyrangersfan19
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Yeah, that sounds like spark knock. Try running Premium for a couple tanks and see if that helps. If it goes away with the premium, then you know thats the problem. I have no idea how to fix it.
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Unread 03-19-2012, 03:41 PM   #15
ToniF303
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Quote:
Originally Posted by nyrangersfan19 View Post
Yeah, that sounds like spark knock. Try running Premium for a couple tanks and see if that helps. If it goes away with the premium, then you know thats the problem. I have no idea how to fix it.
Sounds like maybe the easier try. I'll try that first.

PS - LOVE the Rangers, too!
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