Possible missfire

1. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

   #1 26th March 2010, 20:16

   Hi all I have a saxo 1.1 2000 I have changed everything on the ignition side and also cleaned the crank sensor but it still idles up and down a bit and sumtimes when u listen at the back it will have the occasional pop what else can cause this cheers
2. badboyracergt5 Infrequent Poster Joined: Aug 2008 colchester Posts: 174 MG ZR TD, Saxo Westcoast

   #2 26th March 2010, 20:21

   idle sensor or timing could be out
3. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

   #3 26th March 2010, 20:40

   Icv is new and timing is spot on
4. badboyracergt5 Infrequent Poster Joined: Aug 2008 colchester Posts: 174 MG ZR TD, Saxo Westcoast

   #4 26th March 2010, 20:44

   injector cleaner and check your air intake
5. badboyracergt5 Infrequent Poster Joined: Aug 2008 colchester Posts: 174 MG ZR TD, Saxo Westcoast

   #5 26th March 2010, 20:44

   clean your sensors too
6. lilwayne Regular Poster Joined: Feb 2010 Yateley Posts: 464 1.1 saxo

   #6 26th March 2010, 20:44

   is it when driving or just idling ?
7. Mark51p Super Moderator Joined: Sep 2006 Wakefield Posts: 14427 Golf GT

   #7 26th March 2010, 20:48

   have you checked the plugs?
8. badboyracergt5 Infrequent Poster Joined: Aug 2008 colchester Posts: 174 MG ZR TD, Saxo Westcoast

   #8 26th March 2010, 20:49

   other thing is the coilpack it happened to my brothers car
9. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

   #9 26th March 2010, 21:12

   coil pack is new, along with plugs and leads, its only when idle really, but when driving if i take it over 4k revs it sounds really rough but under its fine, i cheked my plugs the other day and all are nice and grey which is a good sign, could the cat cause problems like this? cause i know my cat is fooked im in need of a new one
10. badboyracergt5 Infrequent Poster Joined: Aug 2008 colchester Posts: 174 MG ZR TD, Saxo Westcoast

    #10 26th March 2010, 21:15

    the cat could be blocking i had that problem when some t**t drove in to the back of me an broke my exhaust and cat
11. scrim Infrequent Poster Joined: Nov 2009 Posts: 191

    #11 26th March 2010, 21:32

    will have to see what its like when get a new cat
12. dima Infrequent Poster Joined: Apr 2009 Posts: 120

    #12 26th March 2010, 23:26

    it might be your lambda sensor. just disconnect it, and see how it runs, in worse case do a diagnostic test in any garage, its like £45 but u will know for sure what is wrong with it.
    gd luck