Important! : bad judder/misfire

1. biglicks1988 Infrequent Poster Joined: Dec 2012 Posts: 133

   #1 27th September 2013, 11:24

   hi everyone i have a persistent problem occurring all the time now with my mk2 saxo 2001 vtr. when i start my engine my idle is fine then when i drive my car it starts juddering and starts spitting and losing power like its misfiring then when i stop my revs are dropping really low nearly cutting out up and down all the time, also when i get biting point and let go it judders and badly idles. ive changed the spark plugs and coilpack and cleaned the injectors i cant understand. help would be muchly appreciated thankyou.
2. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #2 27th September 2013, 11:55

   Map sensor.
   
   Guessing your EML is on? if so run a diag before hand.
   
   Buy a new one or borrow a friends that works 100% just to test. Don't swap it for an old one off a scrapper and rule out MAP sensor like everyone else
3. biglicks1988 Infrequent Poster Joined: Dec 2012 Posts: 133

   #3 27th September 2013, 14:50

   thanks for that pal but no the eml light isn't on i diagnosed it ages ago and it said misfire cylinder three but since i turned it off it hasn't come back on even when the juddering started.
4. user_60153 Regular Poster Joined: Jul 2012 Oxon Posts: 295 MK1 SAXO 1.1i SX-SOLD MK2 TOPAZ VTR-DEAD MK2 POSI

   #4 27th September 2013, 16:28

   try crank sensor and tps sensor can also cause this
5. biglicks1988 Infrequent Poster Joined: Dec 2012 Posts: 133

   #5 27th September 2013, 21:58

   thanks pal much appreciated it was indeed the crank sensor haha. i dont get it very con pfft. confusing when EML light says otherwise. thanks again