large judder and exhaust pop when accelerating

1. Narbar Infrequent Poster Joined: Mar 2008 Stafford Posts: 147 Saxo VTR MK2, BMW 318is

   #1 17th April 2008, 20:03

   Hi, im posting yet another problem with my car lmao, when i accelerate the car pulls like normal but will randomly judder as if the car momentarily looses power and a loud popping noise comes from the exhaust.
   
   Does anyone know what this could be? ive just replaced the fuel pump but the car ran fine for the whole day once changed.
   
   Thanks Dean
2. djmartin Saxperience Post Whore Joined: Nov 2006 Near Hull Posts: 8405 BMW 3.0 X3,toyota mr2 & Skyline R33

   #2 17th April 2008, 20:53

   coil pack mine was the same now runs like a dream and emissions is not as high.
   
   the poppiing is your system missing/backfiring slightly as the coil pack keeps working then not working as its not sending the proper ignitions power to the spark plugs to make the spark so the engine runs you will also find your car wont be fully running on all cylinders at some point.
   
   get your saxo code readed and i promise you it will be something to do with your coil pack.
3. Narbar Infrequent Poster Joined: Mar 2008 Stafford Posts: 147 Saxo VTR MK2, BMW 318is

   #3 17th April 2008, 21:34

   thanks for your help mate, did your car run fine for about 10 minutes then just start going mad then go fine again for another 10 minutes?
   
   The fuel pump was off a vts does anyone know if they are not interchangable? The thing that is blagging ym head is the car runs fine for 10 minutes and then will judder and like mad for a few seconds then work fine again.
   
   Would this still be the coil pack? thanks
4. Nick_106 Regular Poster Joined: Apr 2008 Posts: 470 Ford Ranger Pick Up

   #4 18th April 2008, 01:20

   Coilpack for sure mate!
   
   Brand new ones arent cheap though
5. superchippedvts L-plater Joined: Apr 2008 swansea Posts: 99 1999 mk1 vts superchipped mk1 1995 106 xsi gti c

   #5 18th April 2008, 16:52

   mine done this and it was coolant temp sensor if it does it when car gets warm it could be a few things check coolant temp sensor coil pack map sensor must be 1 off them
6. littleo13 Infrequent Poster Joined: May 2009 armitage/lichfield/rugeley/staffordshire Posts: 174 106 XSi saxo vtr saxo vtr converted to vts

   #6 8th June 2010, 23:30

   mines doin it at the moment think its my injectors pritty sure it is
7. shawy Established Member Joined: Feb 2008 yorkshire Posts: 1152 black mk2 vtr

   #7 8th June 2010, 23:39

   same here im having that problem
   http://www.saxperience.com/forum/sho...d.php?t=317882
8. user_15516 Saxperience Post Whore Joined: Apr 2007 Posts: 6640 Integra DC5R & VTS

   #8 8th June 2010, 23:44

   Clean your MAP sensor up first.