My car is making a rattling noise when I accelerate. It sounds like its coming from the front passenger side, but I'm not entirely sure. My first instinct was that it my headers were a bit loose and that the rattling was caused from exhaust gases, but I tightend them up and the rattling continues. Anyway, I was wondering if anyone here has experienced this same problem and may have an idea of what I could check out to fix it. Any help is appreciated!
Rattling noise during acceleration...
- Thread starter Trefty
- Start date
Stroked&Blown
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NYC LSC
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PhLoBuS
New Member
I have a rattle and I believe it is my exhaust I am getting under the car tomorrow and going to figure it out... I will let you know, mines on the passenger side towards the front
Trefty said:
Sounds like the motor is pinging or predetonating under load. What is your timing set at, comperssion, etc?
PhLoBuS
New Member
I know for a fact mine is not the engine, its the exhaust. Ever since they were installed it has made this noise!
have you gotten under there and pounded the exhaust to listen for the noise? (car off, be safe and all).
if the precious metals in the cats have come loose, when you pound on it, you might hear it rattle around in here (the facade of metals breaks loose and rattles/oscillates).
if the install was recent and a shop installed the exhaust, i might go bug them.
good luck.
if the precious metals in the cats have come loose, when you pound on it, you might hear it rattle around in here (the facade of metals breaks loose and rattles/oscillates).
if the install was recent and a shop installed the exhaust, i might go bug them.
good luck.
Thanks for the advice guys, im gonna spend tommorow trying to tackle this problem. It does sound like the rattling is coming from under the passenger seat, so the cats could be the reason for it. In any case, I think it might have to do with the exhaust because the noise only occurs when I accelerate. Anyway, im gonna check it out tommorow, I appreciate the help 
And my car is stock aside from the new CAI and BBK headers.
And my car is stock aside from the new CAI and BBK headers.
I had an ugly rattle coming from about mid car (kinda like you describe), but I couldn't locate it to the driver or passenger side. It rattled especially under acceleration, or on downshift, and seemed to be most noticable at particular engine rev speeds.
Anyway, it turns out my issue was the heat shields on the cats. They came loose in 3 corners and rattled. But you couldn't tell at all by banging on the exhaust system. That just didn't get the shields to rattle. I could tell they were loose by trying to gently pry or move them around, and sure enough they had bit the dust.
Keep this in mind as you search for your issue. I agree it could be cat internal issues. But if it turns out its only the shields, you can solve that real simply (and cheaply) by ripping em off!
Good luck.
Anyway, it turns out my issue was the heat shields on the cats. They came loose in 3 corners and rattled. But you couldn't tell at all by banging on the exhaust system. That just didn't get the shields to rattle. I could tell they were loose by trying to gently pry or move them around, and sure enough they had bit the dust.
Keep this in mind as you search for your issue. I agree it could be cat internal issues. But if it turns out its only the shields, you can solve that real simply (and cheaply) by ripping em off!
Good luck.
GRGT1994 said:I had an ugly rattle coming from about mid car (kinda like you describe), but I couldn't locate it to the driver or passenger side. It rattled especially under acceleration, or on downshift, and seemed to be most noticable at particular engine rev speeds.
Anyway, it turns out my issue was the heat shields on the cats. They came loose in 3 corners and rattled. But you couldn't tell at all by banging on the exhaust system. That just didn't get the shields to rattle. I could tell they were loose by trying to gently pry or move them around, and sure enough they had bit the dust.
Keep this in mind as you search for your issue. I agree it could be cat internal issues. But if it turns out its only the shields, you can solve that real simply (and cheaply) by ripping em off!
Good luck.
Hehe, well, I have been planning on buying an off-road H-pipe eventually, so if my cats are shot, this will be the motivation I need to spend that money!
When you looked at the cats could you visibly tell that they were wrecked or could you only sense they were gone by moving them? It does seem like this could be whats wrong, hopefully I'll find out tommorow. Thanks again for the help!
PhLoBuS
New Member
I found out I have a metal loop near the exhaust that is hitting it, its actually linked to my h-pipe. Its useless so I am going to just cut it off with a sawzall or something
Well, I checked the cats today, they're fine. Checked to make sure my headers were snug with the h-pipe, they were. But, I noticed that there was exhaust escaping from the back of the passenger side valve covers, quite a bit. Took off the valve cover and the gasket was fine, tightened it back down and realized that its probably the header gasket that is causing the loss of exhaust. So I'm gonna get a new header gasket tommorow and hopefully that will solve this nightmare! 
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