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Just a quick thread on Misfiring on idle. Injectors cleaned, plugs changed..

Discussion in 'Mechanical - Engine, Gearbox, Exhaust etc' started by rumble291, Mar 14, 2014.

  1. Mar 14, 2014 #1
    rumble291

    rumble291

    Hi Guys,

    I've been having a misfiring on idle and rarely a power drop and missfire at high RPM. I've had the injectors cleaned - which helped a lot for the first 1000 miles or so, plugs changed - again helped. Had a map done as it had been fine ever since plugs were changed however now its back to square one :-(. Could the coilpacks be the cause? Is there a way to test them? Lastly which ones would you go for, I've seen some NGK ones on ebay for £25 each but would want to put the best ones in as cars now mapped.

    Cheers,

    Kurt
     
  3. Mar 16, 2014 #2
    Beasley230

    Beasley230

    First things first car needs plugging in to a diagnostic machine to see if there's any codes , no point throwing parts at it to fix it mate !

    Coilpacks are common but just because of this doesn't make it them !

    Where abouts do you live ?
     
  4. Mar 23, 2014 #3
    rumble291

    rumble291

    Thanks for the reply! I mapped my car with an RSTuner (due to distance from RStuning, leeds) and there were a couple, one from me not plugging everything back in after doing airbox mod (twat! haha) and the other was multiple random misfires detected which was when it was really bad after flooring it coming off a roundabout suddenly lost power, changed plugs and cleaned injectors and all was running ok.

    It seems ok but occasionally on idle it, coughs every now and then. Seems very random though and sometimes when driving hard it looses power for a second or two? I love down in Cornwall.

    Cheers,

    Kurt
     
  5. Apr 1, 2017 #4
    HamsteR26

    HamsteR26

    Hi mate. Did you ever cure the missfire? Im having the same issue on my 225. When the car is at idle it pops from the n/s tailpipe and the tailpipe itself is colder than the o/s 1 and when the car is cold all the exhaust vapour is coming out of the o/s tailpipe and none from the n/s tailpipe if that make sense? Help anyone?
     
  6. Apr 2, 2017 #5
    TimR26

    TimR26 South Central RSM Area Rep

    Popping is usually a sign of injector problems. Have they ever been changed? If not then it is worth doing as it's a common fault.

    The exhaust gas takes route of least resistance so coming out of one tailpipe at idle is normal.
     
  7. Apr 2, 2017 #6
    HamsteR26

    HamsteR26

    Hi mate. Thanks for the info. I dont see anything mentioned in the service history about injectors. Is it an expensive fix? Also i have a warranty on the car as i have just bought the car from a renault garage so maybe i should mention it to them.
     
  8. Apr 2, 2017 #7
    TimR26

    TimR26 South Central RSM Area Rep

    They're about £50 each so would get the garage to sort it instead of potentially buying them and not curing it.
     
  9. Apr 3, 2017 #8
    HamsteR26

    HamsteR26

    I will do that mate. Thanks
     

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