car judders under load

1. user_32315 Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo

   #1 21st July 2013, 16:09

   not a saxo but my new punto hgt..
   
   it judders when the car is under load ie when you accelerate in low revs, iv you drop it down a gear its fine, my first though was maybe a clogged fuel rail/injectors not being able to supply enough fuel when its needed
   
   been looking on fiat forums and a few people say the coil packs/leads, but i dont think that is my problem due to only happening when im in low revs
   
   and another possible solution can be the variator which seems to control the inlet cam shaft as a sort of VVT, another symptom is that the car sounds a little like a diesel on start up, which it does... so could be my problem
   
   anyone else got another thoughts before i resort to joining a punto forum
2. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #2 21st July 2013, 16:18

   Check the charging rate of the alternator,as if the voltage regulator is faulty then the output will be up/dowm.
3. user_32315 Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo

   #3 21st July 2013, 16:22

   Quote:

   Originally Posted by stevo67 Check the charging rate of the alternator,as if the voltage regulator is faulty then the output will be up/dowm.

   cheers dude the last owner did say he thought there might be something up with the alternator so this seems to add up
4. user_32315 Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo

   #4 21st July 2013, 16:26

   gonna check the faults codes when i get to my gfs later today her step dad has a reader so that might bring something up