Vts still misfiring

1. skids_vts Regular Poster Joined: Nov 2011 valleys Posts: 395 saxo vts

   #1 27th January 2012, 18:36

   Hey guys, my vts started to develop a misfire, changed the spark plugs for good measure and still doing it
   Then changed coilpack and MAP sensor, still misfiring tho?? No EML on either?
   Was thinking crank sensor or lambda sensor, but then the EML isnt even on?
   Any othe ideas much appreciated guys
   
   thanks
2. user_29491 Saxperience Forum Bum Joined: Dec 2008 Lancs Posts: 4124 JP4S'd R.

   #2 27th January 2012, 18:40

   Fuel filter been changed recently?
3. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

   #3 27th January 2012, 18:43

   As above or blocked injector/s.
4. user_49499 Infrequent Poster Joined: Jan 2011 bedford Posts: 104 diablo red 106 gti, focus st2 (330 club) :-)

   #4 27th January 2012, 18:43

   pull the plugs and have a look down the hole into each cylinder.
   if one seems a bit damp and the end of the plug seems wet could have faulty injector like i had recently. no warning lights or anything just misfire and a bit gutless.
5. skids_vts Regular Poster Joined: Nov 2011 valleys Posts: 395 saxo vts

   #5 27th January 2012, 19:20

   Quote:

   Originally Posted by saxova Fuel filter been changed recently?

   No dont think so, will check that and the injectors
6. skids_vts Regular Poster Joined: Nov 2011 valleys Posts: 395 saxo vts

   #6 28th January 2012, 18:33

   Hmm just listened to the engine and it seems to be ticking over fine. Exhaust seems to be blowing though, would this be the cause of it running lumpy and loss of power due to the loss of back pressure??
7. user_51379 Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS

   #7 28th January 2012, 19:01

   blowing zorst shouldnt make it missfire mine did this and it was a temperature sensor
8. skids_vts Regular Poster Joined: Nov 2011 valleys Posts: 395 saxo vts

   #8 28th January 2012, 19:26

   Quote:

   Originally Posted by sam_16v blowing zorst shouldnt make it missfire mine did this and it was a temperature sensor

   But the engine sounds fine?
9. user_51379 Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS

   #9 28th January 2012, 20:05

   blowing zorst will cause a slight loss of power
10. user_20080 Saxperience Hardcore! Joined: Dec 2007 smurfland. Posts: 17346 Ex saxo owner.

    #10 28th January 2012, 21:00

    Quote:

    Originally Posted by sam_16v blowing zorst will cause a slight loss of power

    It can also make the car run slightly richer(fueling)because the exhaust gases get sucked back up.(correct me if i`m wrong)
11. user_51379 Saxperience Forum Bum Joined: Mar 2011 plymouth Posts: 2921 mk2 VTS

    #11 28th January 2012, 21:01

    Quote:

    Originally Posted by stevo67 It can also make the car run slightly richer(fueling)because the exhaust gases get sucked back up.(correct me if i`m wrong)

    no your quite right steevo sir
12. Pricklep Saxperience Hardcore! Joined: Mar 2008 Posts: 31279 Citroen Saxo VTS, S60 D5

    #12 28th January 2012, 21:07

    ..