Idling from cold start

1. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

   #1 25th February 2010, 11:06

   So my car idles shit from cold, the exhaust pops and the engine jerks so can't be doing any good! I've replaced the coolant temp sensor and stepper motor. Still does it! What can I try next?
2. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #2 25th February 2010, 11:12

   It's kinda normal to be honest. I have to sit and let mine idle for about 20 seconds (from a dead cold start) before attempting to do anything haha.
   
   I've reason to believe that using a thinner oil can help... i.e 5W-40. I could be wrong though.
3. samueljonburgess Saxperience Forum Bum Joined: Dec 2007 bromley Posts: 2728 Nissan S13, Saxo Furio

   #3 25th February 2010, 11:15

   mines very lumpy from cold but its camed aswell so dont think that helps lol, let mine tick over for about 30seconds
4. holdawayt Saxperience Post Whore Joined: Jan 2010 Stourbridge Posts: 7338 Nissan 200sx S14a

   #4 25th February 2010, 11:16

   mine too, (vtr) idles waay under 1k and splutters, sometimes stalls if i dont tease the throttle!
5. Boosted Regular Poster Joined: May 2009 Malta Posts: 359 1.5D Saxo Mk1

   #5 25th February 2010, 11:24

   mine started to do so about last month...idles bad but as soon as i press lightly the throttle a black cloud comes out of the exhaust (being diesel) and its ok than
6. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

   #6 25th February 2010, 11:25

   There's deffinately something wrong I've had the car 15 months and it's only started doing it like 6 weeks ago. There's got to be something wrong
7. holdawayt Saxperience Post Whore Joined: Jan 2010 Stourbridge Posts: 7338 Nissan 200sx S14a

   #7 25th February 2010, 11:52

   same here mate.
   
   maybe idle control valve? i know these go in fiesta's quite often. not too sure about the saxo's
8. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

   #8 25th February 2010, 12:17

   Quote:

   Originally Posted by holdawayt same here mate. maybe idle control valve? i know these go in fiesta's quite often. not too sure about the saxo's

   Like i said mate, ive changed it. Still same problems.
   
   When i start it up it runs on for about 20 seconds.. then it will start chuddering and jerking. Then after a minute of that it will idle ok again. And only does it when cold.
9. saxotourdecorse Regular Poster Joined: May 2008 Posts: 448 Not a drop of halfords anywhere....

   #9 25th February 2010, 12:19

   maf sensor ... mass air flow sensor can cause this. both the maf and the coolant temp sensor work in same way. if either fail then on a cold start the ecu will not provide the right amount of fuel into the engine... causing it to run like shit till it reaches optimum temperature. often causing the car to run on 3 cylinders for about 5 minutes till its warm, thats why your idle is shite...if the problem persists when the car is warm look into 1.coil pack 2. faulty injector.. if it goes away when its warm will be maf or coolant temp sensor..
10. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

    #10 25th February 2010, 12:42

    just check your coil pack?? or worn injector........lol...
11. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

    #11 25th February 2010, 12:44

    Tried redex injector cleaner too. Whats the MAF sensor? where is this located? I was going to change the MAP sensor too?
12. user_10418 Saxperience Addict Joined: Jun 2006 Wirral Posts: 13584 Wickerd red VTS MK2, Two tone VTS MK2,vvc Metro..

    #12 25th February 2010, 12:48

    Quote:

    Originally Posted by DJDannyB Tried redex injector cleaner too. Whats the MAF sensor? where is this located? I was going to change the MAP sensor too?

    redex can cause problems mate!! like blocked fuel injectors...seen alot of this when i worked at citreon.........
13. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

    #13 25th February 2010, 12:51

    Well it didnt seem to make any difference so hopefully it hasnt blocked anything. Is the MAF sensor the MAP sensor? same thing?
14. lharrowing Frequent Poster Joined: Nov 2008 norwich Posts: 941 Citroen Saxo Westcoast MK1

    #14 25th February 2010, 19:09

    yes it is
15. nichollsvts Infrequent Poster Joined: Feb 2010 Middlesbrough Posts: 220 MK2 Saxo VTS Skoda Octavia VRS

    #15 25th February 2010, 21:10

    I had the similar same problem on my VTS MK2, only mine wouldn't idle at all from cold and would stall. Was jerky when driving and stopped once warmed up.
    
    Now this sounds daft but have you checked your car battery? Mine had been stud for a while and I stuck oncharge over night, and since then no problem what so ever. I know it sounds bonkers but it worked for me so might be worth a shot.
16. DJDannyB Saxperience Forum Bum Joined: Jun 2008 Stockport Posts: 2687

    #16 25th February 2010, 21:16

    Ive been and ordered a new map sensor so will fit that tomorrow and see if it fixes it. If not then im clueless as to what it might be?
    
    Battery is fine yes mate tested it.