Funny noise at 1800RPM

1. user_34090 Established Member Joined: May 2009 Devizes Posts: 2280 Blue Clio 172 Cup

   #1 7th May 2010, 21:11

   When my counter reaches around 1800rpm there's this strange like metallic vibrating noise from like under me, exhaust system?
   Happens for only a brief moment but it's a new thing.. Any ideas?
2. Gareth_R Established Member Joined: Mar 2010 Basildon, Essex Posts: 1042 Citroen AX VTS

   #2 7th May 2010, 21:31

   exhaust tapping on the bottom of the gearlever
   
   possible the heatshield on the manifold rattling in the engine bay (if your directional hearing isnt up to much lol)
3. user_36198 Saxperience Post Whore Joined: Aug 2009 ilkeston derbyshire Posts: 9823 C2 VTR stripped, 406hdi, clio 172

   #3 7th May 2010, 21:55

   heatshield under the car loose and vibrating? cat breaking up internally?
4. user_11357 Saxperience Forum Bum Joined: Aug 2006 Sunbury On Thames, Surrey Posts: 2593 I like Bikes now 👍🏻

   #4 7th May 2010, 21:57

   Flux capacitor kicking in?
   
   Check the center pipe/manifold join...
5. Gareth_R Established Member Joined: Mar 2010 Basildon, Essex Posts: 1042 Citroen AX VTS

   #5 7th May 2010, 22:16

   if you're running a 100 shot of nos you might have blown the welds on the intake and the floor could be about to fall out
6. user_39821 Saxperience Forum Bum Joined: Dec 2009 Uckfield, East Sussex Posts: 3362 Citroen saxo 1.4 furio

   #6 7th May 2010, 22:19

   Quote:

   Originally Posted by Gareth_R if you're running a 100 shot of nos you might have blown the welds on the intake and the floor could be about to fall out

   lol....
7. user_34090 Established Member Joined: May 2009 Devizes Posts: 2280 Blue Clio 172 Cup

   #7 9th May 2010, 21:46

   Haha now i tightened up the manifold it's now a noise at 2200...
   Might change to standard backbox to see if that changesd anything
8. Jarhead Frequent Poster Joined: Feb 2010 Posts: 561

   #8 10th May 2010, 23:54

   I have the same problem. I get vibrating anywhere between 2/4000 revs. Everything underneath my car is completely standard.
9. user_28590 Infrequent Poster Joined: Nov 2008 Cornwall Posts: 219 Saxo Exclusive 1.4i

   #9 11th May 2010, 11:27

   tighten everything up, so it'll then rattle at higher rpm, then you could shift earlier .. it'll also save petrol too
10. user_34090 Established Member Joined: May 2009 Devizes Posts: 2280 Blue Clio 172 Cup

    #10 11th May 2010, 21:18

    Tightened backbox connection has solved it i hoope