rattle after heavy acceleration?

[ross87t]

Hey guys. I'll get in my car, start it up, drive around and everthing is perfectly normal. But, after I beat on it a couple times in a row, I can hear a rattling coming from underneath the car @ idle. The rattle goes away at around 1400rpm, but continues at higher rpms. I tried to see if the exhaust was rubbing, but didn't see anything. Could it be the converter? Any suggestions?

Thanks,
Ross

 

[John Larkin]

I had two loose converter bolts once. It would knock/rattle at idle. Never at speed though.

 

[Evans Ward]

Mine did that once and it was one of the baffles inside one of the mufflers. My car would rattle at a certain RPM and resonance. You could check this by: first making sure the car/ motor is cold and by getting underneath and grabbing and shaking each muffler. always remember when you're under a car to have appropriate jack stands as well as floor jack support and eye protection. This message brought to you courtesy of TB.com

 

[ross87t]

I can drive the car all day long without this rattling happening, but after I beat on the car once or twice the rattling starts. I'ts not the mufflers, and if it were the converter bolts, I'd think it would rattle all of the time.

Ross

 

[ross87t]

I found out what it is. It's the puck sticking in the ATR downpipe.

Ross