Engine not running right.

1. user_43529 Regular Poster Joined: Apr 2010 Bournemouth, England Posts: 325 Vectra 2.5 GSI

   #1 15th November 2011, 08:47

   When driving it sounds like a muscle car or something lol and if i put it in a high gear the juddering becomes unreal. Also a loss of power, Im guessing the engine is not firing up properly so my first guess is the coilpack or sparkplugs? Not sure what step to take to find the problem so any help would be appreciated . Thanks in advance.
2. kennym1987 Established Member Joined: Sep 2007 Armadale, West Lothian Posts: 1230 flatty 16v sleeper and a regular vts

   #2 15th November 2011, 15:58

   when i forgot to plug my map sensor in mine ran very lumpy
3. philliantkr Regular Poster Joined: Sep 2009 Birmingham Posts: 414 Citroen Saxo VTR (2000)

   #3 15th November 2011, 23:13

   Sounds like coil pack
4. Pricklep Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5

   #4 15th November 2011, 23:14

   say if your coilpack, spark plugs are recently newish (1/4k) and you still get miss firing on the odd cold morning start-ups, what would you suggest it was?
   
   sorry for the hi-jack, well sort of.
5. Ben_SaxoForte Saxperience Forum Bum Joined: Mar 2009 Stoke-on-trent Posts: 2640 Mk5 Golf GTTDI Mk2 VTR Project

   #5 15th November 2011, 23:19

   Quote:

   Originally Posted by John_G say if your coilpack, spark plugs are recently newish (1/4k) and you still get miss firing on the odd cold morning start-ups, what would you suggest it was? sorry for the hi-jack, well sort of.

   I would be looking at coolant temp sensor or lambda sensor
6. Pricklep Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5

   #6 15th November 2011, 23:21

   Quote:

   Originally Posted by Ben_SaxoForte I would be looking at coolant temp sensor or lambda sensor

   (not a saxo issue, another car but still)
   
   Cheers!
7. Low-n-Saxslow L-plater Joined: Nov 2011 Dorset Posts: 67 Saxo VTR & Suzuki Swift Sport

   #7 16th November 2011, 09:21

   It could be a loose plug if your missfireing?
   
   If new they might not have been put in tight enough and rattled lose under pressure, you would also hear a deep throttle reponsive blow from under the bonnet as the pressure forced its way through the plug port.
8. Tontsy Saxperience Addict Joined: Oct 2008 Plymouth, Fiddling - under a two poster ramp Posts: 14064 Audi

   #8 16th November 2011, 10:59

   is it running left?