M52 Exhaust Noise Rattle... What Is It?..Help

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Wilson325i
E30 Zone Camper
E30 Zone Camper
Posts: 1184
Joined: Sun Jan 09, 2005 11:00 pm
Location: Here in SE

Post Fri Jan 15, 2010 3:44 pm

Hi guys, my m52 pops/rattles in the exhaust when i press or back of the throttle (sp) i changed the back box thinking that would help, but it has not. Do you guys suffer from this? if so have you cured it and how/what did you do to it? :(

It does not smell rich, the lambda sensors are not coming on the scaner. Also it does not have a middle box, its two pipes from the manifold to the back box. would fitting a middle box help? :?
E30BeemerLad
Married to the E30 Zone
Married to the E30 Zone
Posts: 16806
Joined: Mon Mar 28, 2005 11:00 pm
Location: Norfolk

Post Fri Jan 15, 2010 3:52 pm

Check your lambda sensors are actually tight.

I had a metallic sound coming from mine when revving it and letting off, noticed I had forgotten to fully tighten up one of the sensors.
Wilson325i
E30 Zone Camper
E30 Zone Camper
Posts: 1184
Joined: Sun Jan 09, 2005 11:00 pm
Location: Here in SE

Post Fri Jan 15, 2010 4:23 pm

Yeah its a metalic sound, and the sensors are realy tight. i have a video of it some where on the computer.
But it seams to come from the back end of the exhaust, and it is driving me nuts. Even a little start stop in traffic it pops when you back of, when the revs start to drop down.