Stihlman Posted May 22, 2016 Share Posted May 22, 2016 Can anyone tell me what this is and where it came from. They were hot when I picked them up Link to comment Share on other sites More sharing options...
Mack Truck Posted May 22, 2016 Share Posted May 22, 2016 was it near the tail pipe. it looks like catalytic converter core material to me. how is the power from the engine? 2 Link to comment Share on other sites More sharing options...
Stihlman Posted May 22, 2016 Author Share Posted May 22, 2016 (edited) Funny you should ask. Motor has about 260000ish miles feels very tired compared to my 88 with 158000 it had some ofthe vac lines plugged so I reconnected them and it ran stronger but started backfiring when the rpms dropped from 4k to 2k sounded like a 9mm going off under my seat startled the crap out of me and the car next to me. I just bought this hatch today and was driving home from Seattle going about 75-80mph my follow car told me it fell out the bottom but they couldn't say where from Edited May 22, 2016 by Stihlman Link to comment Share on other sites More sharing options...
Scott in Bellingham Posted May 22, 2016 Share Posted May 22, 2016 From your cat, it can clog up he exhaust and run powerless untill unclogged 1 Link to comment Share on other sites More sharing options...
Stihlman Posted May 22, 2016 Author Share Posted May 22, 2016 As far as I can see the only way it could exit the cat is to blow through my exhaust. I don't see any 1 inch holes in my cat or pipes. Does that mean that my muffler is literally shot full of holes internally? Link to comment Share on other sites More sharing options...
calmblin_gl10 Posted May 22, 2016 Share Posted May 22, 2016 ''Does that mean that my muffler is literally shot full of holes internally?'' not necessarily. but not impossible. depending on the muffler and how it channels exhaust its likely that those bits manage to snake their way around and eventually exit the tailpipe. the converter itself isnt that dense to penetrate metal unless under a crazy amount of force. and the compressive forces required to do so wouldnt effectively be able to build up behind those bits to effectively shoot them through your exhaust system. its not impossible. but very unlikely. but would be kinda cool. asides from the destroying stuff and potentially hurting people Link to comment Share on other sites More sharing options...
Stihlman Posted May 22, 2016 Author Share Posted May 22, 2016 There is a pretty strong stream of air coming out of the tail pipe. It'd does not feel constricted and does not "chugga chugga" like it is backed up. Link to comment Share on other sites More sharing options...
calmblin_gl10 Posted May 22, 2016 Share Posted May 22, 2016 would be interesting to see if it actually did some damage to the muffler internals. . Link to comment Share on other sites More sharing options...
ivantruckman Posted May 23, 2016 Share Posted May 23, 2016 I would address the backfire issue first Link to comment Share on other sites More sharing options...
DaveT Posted May 24, 2016 Share Posted May 24, 2016 Looks like burned out catalytic core. Normal working core is not black. I once had the core dislodge in one of mine. It moved around and mostly blocked the exhaust in the cat. The car ran pathetically. Weak. Didn't want to accelerate. Got it home. Did a few tests, and discovered the cause mentioned above. Could have just failed due to age. Or running rich, burning lots of oil, O2 sensor out of whack - but not so out as to trigger a trouble code. Link to comment Share on other sites More sharing options...
Stihlman Posted May 24, 2016 Author Share Posted May 24, 2016 (edited) I would address the backfire issue first it started backfiring when i unplugged the vacuum hoses and put them back on the air filter. What would cause that. Edited May 24, 2016 by Stihlman Link to comment Share on other sites More sharing options...
nipper Posted May 24, 2016 Share Posted May 24, 2016 A Vacuum gauge will tell the health of your exhaust system. Those big pieces dont include the small peices you left all over the neighborhood. Link to comment Share on other sites More sharing options...
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