splutter /missfire during warm up

1. user_4681 Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts

   #1 6th July 2010, 19:29

   i have a 97 vts engine in my 2000 vts after blwing up the 2000 engine (track days).
   
   i have swaped all my old mk2 sensors over to the 97 engine. as the title above states...
   
   the car starts perfectly and is strong from cold. drive out my street and up the road the car develops a miss and splutters at any speed/gear/throttle position. it will not clear with a blip of throttle.
   
   i have bought
   
   new plugs
   new coil pack
   new map sensor
   
   no better for it.
   
   could it be the lambda, ecu fault or possibly a blocked injector? i am thinking more the lambda. mine is the 1 lambda engine
   
   stew
2. user_35312 Established Member Joined: Jun 2009 Coventry CV6 Posts: 2477 Slowda Octavia vRS SOLD - Cam'd Chip'd VTR

   #2 6th July 2010, 19:36

   how much fuel is it using? Lambda fault was cause it to drink fuel usually..
   after its warm does it still missfire mate?
3. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #3 6th July 2010, 19:37

   Could try disconnecting the lambda and see if anything changes?
4. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #4 6th July 2010, 19:46

   Test the coolant temp sensor
   
   Check it's resistance against the dash temp sensor
5. mardiGRANT Regular Poster Joined: Jun 2009 Ghetto spec HQ Posts: 412 Saxo vtrS/ nissan 200sx s13

   #5 6th July 2010, 20:15

   should they be equal? do you mean the sensor screwed in the head?
6. lharrowing Frequent Poster Joined: Nov 2008 norwich Posts: 941 Citroen Saxo Westcoast MK1

   #6 6th July 2010, 22:47

   id relly like to know the answer to this mines exaxtly the same it idles lumpy too the water temp is always bottom unless sitting still but this splutter goes once cars been runnin for min or 2
7. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

   #7 6th July 2010, 22:52

   time to get the multimeter out, hat off to Alex for writing this:
   
   http://www.106owners.co.uk/forums/th...ic-diagnostics
8. user_4681 Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts

   #8 7th July 2010, 06:58

   all sensors are new last year from dealers. ecu, water, radiator etc...
   
   some super replys there. see what i can do with them.
9. AlexBp West Midlands Joined: Dec 2007 West mids Posts: 23149 Supra,civic GL

   #9 7th July 2010, 07:10

   i got a missfire from having the wring fuel injectors after doing a similar conversion
10. user_4681 Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts

    #10 11th July 2010, 08:32

    going to try some injector cleaner
11. marcus-vts Newbie Joined: Jul 2010 hafodyrynys, blackwood Posts: 12 nova, cavalier, astra mk3 turbo (300bhp), impreza

    #11 11th July 2010, 18:50

    i have a similar problem, i just bought my saxo vts on a R-reg a week ago and it splutters when when i drive slow and on tick over. but its fine when i put my foot down or go a little faster any idea what it could be?..... im sure its over fueling aswell cuz i put 20pound in petrol and gave me half a tank and only went 65miles and didn boot it once and its just on top of the red now
12. lharrowing Frequent Poster Joined: Nov 2008 norwich Posts: 941 Citroen Saxo Westcoast MK1

    #12 11th July 2010, 23:11

    well just to update you i changed my whole thermostat housing and had another sensor in it though it made a diff and it stopped the spluttering but still have a lumpy idle and temp gauge sits so low when driving, confusing.
13. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

    #13 12th July 2010, 08:49

    Quote:

    Originally Posted by lharrowing well just to update you i changed my whole thermostat housing and had another sensor in it though it made a diff and it stopped the spluttering but still have a lumpy idle and temp gauge sits so low when driving, confusing.

    Well that hints at a few things being wrong.
    
    Either the dash coolant temp gauge is buggered, or the wiring or dash unit is faulty.
14. user_4681 Saxperience Post Whore Joined: Dec 2004 Grimsby United Kingdom (England) Posts: 5489 SUPERCHARGED saxo vts

    #14 12th July 2010, 14:38

    did you fit a new thermostat. sounds like what is causing the over cooling issue.
15. lharrowing Frequent Poster Joined: Nov 2008 norwich Posts: 941 Citroen Saxo Westcoast MK1

    #15 12th July 2010, 21:06

    ive tried with two different thermostats make no diff on the dash when temo guage gets to about the bottom line sightly above that the thermostat opens you can feel the ho water go through the top pipe it will hit middle than fan kicks in but when you drive away the guage on dash drops down slowly. abit odd. so its that and the lumpy idle.