If it is stock, then it could be the catalitic converter heat shield. Mine does it and i've talked to some other people with the same problem. Talk about annoying

 

ABS or exhaust? What's this thread about? ABS really sounds like an electric pump, I wouldn't describe it as a rattle.

If you open the hood & have somebody listen while you start up the car, its pretty easy to tell where the noise is coming from. The location is very misleading for you sitting in the driver seat.

If its the exhaust, there's another possibility. My "A" pipe (from manifold to catalyst) made a rattling noise that sounded just like a loose heat shield. That piece is really a pipe-in-a-pipe, & the inner one was buzzing against the outer one.

That pipe cost so much that I used it as an excuse to get a DC header.

 

I looked it up...
If it takes more than 40 seconds to pump up when you start the car the ABS controller stores a fault code & lights up the idiot light.

It also stores a code & turns on the light if it has to pump itself back up for no reason while you're driving.

Either way, all you gotta worry about is that the lamp is supposed to be on for a couple seconds while you start. The ABS is checking itself out, & you are paying attention (right?) in case the bulb is burned out. If the lamp doesn't stay on then its OK.

If the noise is actually your exhaust... never mind.

 

My car only makes the ratteling noise when its getting warmed up, god its most annoying. and I have the comptech catback.

 

Thanks jim for looking that up, i feel a little better bout it. My car only does it for a few seconds at a time.

 

My teg makes this whistling noise but thats from the alternator belt, it always does than when the car is cold, and it's not an abs because i don't have one lol

 

Is there any way of getting rid of that HORRIBLE whistling noise. I get it soooooo bad all the time. It will happen for about 3 months and then just suddenly one day it will go away for a few months. And now it is back. It is sooo loud in my car, is there any way of fixing that?

 

you can try adjasting the tension of it, or get a special belt drssing spray and just spry all over it, that works for me most of the time, it only does that when it's really cold, like you said onece in a while and than it just goes away

 

hey i have this problem too. before the noise would come on then my ABS light would go on. i filled the ABS resorvoir up and it fixed the problem for a while but now sometimes the light comes on while im driving. I noticed that my resorvoir has gone down and its sorta wet in that area of the engine compartment. I think i have a leak in my ABS system somewhere...

 

Try some belt dressing, but I don't think that's a real good permanent fix. If it works immediately then you know you need a new belt. How old are the belts? If they're new, then probably the tension is wrong.

If the belt dressing doesn't work, then I'd be looking for a bearing that's starting to go. Use a foot of garden hose up to your ear to narrow down the location of the noise.