Engine wants to die after revving

1. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

   #1 17th June 2011, 16:36

   I have a new back box today because my other one was rusted to f***.
   I got home and gave it a rev, Revved it to about 4-5k then took my foot off the accelerator, The revvs dipped down below 1k and car shook, Then it recovered,
   Nothing is wrong with idling, I can turn the car on stick it in neutral and it stays at just over 1k.
   
   Any ideas?
   Could get video if needed.
   
   Cheers.
2. Ben_SaxoForte Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project

   #2 17th June 2011, 18:01

   probably idle control valve try resetting it, turn ignition on and off 6 times then start it on the 7th
3. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

   #3 17th June 2011, 19:08

   Quote:

   Originally Posted by Ben_SaxoForte probably idle control valve try resetting it, turn ignition on and off 6 times then start it on the 7th

   What shall i do if it continues?
4. user_51601 Infrequent Poster Joined: Mar 2011 Bridgend/South Wales Posts: 136 '52 Desire 1.1i Sport Red 1.6Vti 120 DS3

   #4 17th June 2011, 19:14

   check to see if the exhaust isnt blowing anywhere ?
5. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

   #5 17th June 2011, 23:12

   I have checked and no leaks...
   
   Hmm, If i start the car after it's been off for about 15mins i can rev it and then it idles around the 1k mark, After a drive then stop and rev it it then dips down to between 0 revs and 500revs. This is wierd, anyone have any ideas..
   
   Jordan.
6. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

   #6 18th June 2011, 16:42

   Heres a video of what happens..
   Please help.
   
   
7. jacko616 Infrequent Poster Joined: Nov 2010 Midhurst Posts: 119 Mk2 Icelandic Vtr '86 Mini

   #7 18th June 2011, 16:48

   http://www.saxperience.com/forum/sho...d.php?t=174710
   
   Should help
8. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

   #8 18th June 2011, 16:52

   Quote:

   Originally Posted by jacko616 http://www.saxperience.com/forum/sho...d.php?t=174710 Should help

   Would help if i needed help with idling lol, It idles perfectly, Just once i start revving, It drops
9. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

   #9 18th June 2011, 19:32

   Some one please help
10. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

    #10 19th June 2011, 12:56

    bump...
11. VTS123 Regular Poster Joined: Mar 2007 Poole, Dorset Posts: 447 Mk1 VTS

    #11 19th June 2011, 17:53

    You could try resetting the ECU by disconnecting the battery for around 30 mins.
12. Renouf Infrequent Poster Joined: May 2011 Cwmbran, South Wales Posts: 248 Saxo 1.1

    #12 19th June 2011, 21:24

    Quote:

    Originally Posted by VTS123 You could try resetting the ECU by disconnecting the battery for around 30 mins.

    I'll try this, Thanks mate.
13. VTS123 Regular Poster Joined: Mar 2007 Poole, Dorset Posts: 447 Mk1 VTS

    #13 19th June 2011, 22:25

    Otherwise, I'd definately say that it isn't really something to worry about - just a characteristic! You get used to it with a Saxo!
    
    It could just be that the old box had much more back pressure so the revs dropped more slowly and the idle control valve had time to do its thing