Blocked exhaust

1. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

   #1 18th April 2011, 20:46

   I a center box had colapsed would this cause over fueling and rough running? My 16v is running rough and its had all sensors replaced but when it get hot there is a horrible burning smell from the exhaust which is making me think the center silencer has burnt out and colapsed due to haveing no cat, could this be? The exhaust has a fair bit of pressure coming out the back and spits back crap out.
2. eggy01 Regular Poster Joined: Feb 2011 kings lynn Posts: 403 Citroen Saxo Vtr

   #2 18th April 2011, 20:54

   if its got alot of pressure coming out then i dought its blocked lol but could have colapsed its a posibility and yer it will make it run abit worse to a certain extent as no back pressure
   
   matt
3. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

   #3 18th April 2011, 21:04

   There seems to be a fair bit of back pressure but its up and down. Its a 16v with a 106 diesel center pipe so its got a box were the 16v cat should be instead so im thinking it could have burnt the baffles out and colapsed because not long ago people were telling i was shooting flames out the exhaust.
4. seddon89 Frequent Poster Joined: Jul 2010 gateshead Posts: 807 vw golf GTI citroen saxo forte 02 plate vw polo

   #4 18th April 2011, 21:08

   it may be full of carbon, was the exhaust new before fitting?
5. eggy01 Regular Poster Joined: Feb 2011 kings lynn Posts: 403 Citroen Saxo Vtr

   #5 18th April 2011, 21:11

   wouldnt be surprised if its colapsed then mate if it shit flames out as that will shatterthe insides of the silencer and that will explain why its running shit most robs
   
   matt
6. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

   #6 18th April 2011, 21:14

   Yeh it was all new, its been on for nearly 6 months. It runs lumpy and now it wont run at all unless you hold the throttle open and it seems to be sucking alot on the air filter also before all the running issues it was bogging down.
7. RustySkull Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0

   #7 18th April 2011, 22:03

   How do you mean by collapsed?
8. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #8 18th April 2011, 22:08

   Has you car got 2 lambda sensors?If so is the 1st 1 sleeved? 2nd a lot of carbon deposits could be down to it having no CAT & running rich.
   
   
   Steve.
9. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

   #9 19th April 2011, 07:34

   Quote:

   Originally Posted by stevo67 Has you car got 2 lambda sensors?If so is the 1st 1 sleeved? 2nd a lot of carbon deposits could be down to it having no CAT & running rich. Steve.

   Its got 2 lambdas the first one is in the manifold and the second is sleeved.
10. citroen_saxo_vtr Saxperience Forum Bum Joined: Mar 2006 Norwich Posts: 2823 Vectra sri 2.6 v6

    #10 19th April 2011, 07:35

    Quote:

    Originally Posted by Bikekid450 How do you mean by collapsed?

    The baffles may have burnt up and dropped and sitting in the bottom of the box clogging it up.
11. RustySkull Saxperience Post Whore Joined: Oct 2009 Basildon And Corringham, Essex Posts: 5179 MK1 Focus RS, Discovery TD5, Renault Trafic 2.0

    #11 19th April 2011, 10:01

    Quote:

    Originally Posted by citroen_saxo_vtr The baffles may have burnt up and dropped and sitting in the bottom of the box clogging it up.

    Ohh you have baffles, sorry though you had a aftermarket Exhaust.
    
    They'll blow out in small bits, I doubt they'd collapse in a big pile lol.