Results 1 to 7 of 7
  1. #1
    rcab85's Avatar
    Join Date
    Nov 2011
    Location
    lavalette, New Jersey, United States
    Posts
    1,612
    +1
    84

    rough idle 1.8 ho

    hey fellas i, stumped here goes nothing.
    2012 vxr rough idle runs good above idle.
    tried plugs, coils, drained gas, fuel pressure 52 perfect, compression 150 x 4,
    throttle body swap, injectors cleaned and flow tested and switched from known good running ski, ohmed every sensor on the ski, spark gap tested coils, checked injector pulse, swapped ecu's, still rough shit idle any ideas?


  2. #2
    maxadrenaline's Avatar
    Join Date
    Nov 2007
    Location
    Mobile AL
    Posts
    1,481
    +1
    174
    Cam timing may be a little off

  3. #3
    Vacuum leaks case poor idle.

  4. #4

    Join Date
    Jul 2014
    Location
    Gulfport Ms
    Posts
    514
    +1
    116
    I have a 2017 VXR has idled like a top fuel dragster since day one, messed with it a while never could get it to idle right but as soon as you hit the gas its as smooth as silk and runs so damn good i dont worry about it anymore at a 109 hours.

  5. +1 by:


  6. #5
    TimeBandit's Avatar
    Join Date
    Jun 2016
    Location
    Tampa Bay
    Posts
    698
    +1
    148
    Quote Originally Posted by rcab85 View Post
    hey fellas i, stumped here goes nothing.
    2012 vxr rough idle runs good above idle.
    tried plugs, coils, drained gas, fuel pressure 52 perfect, compression 150 x 4,
    throttle body swap, injectors cleaned and flow tested and switched from known good running ski, ohmed every sensor on the ski, spark gap tested coils, checked injector pulse, swapped ecu's, still rough shit idle any ideas?
    2012 is the same engine I have, cast intake manifold and metal fuel rail, etc . . .
    Well, I'd say you've eliminated everything electrical - right down to the ecu . . . so when you were swapping the TB, how did that dampener look ... did you test to see if you could physically separate the metal plate & molded (attached) rubber - or was that swapped too?

  7. #6
    rcab85's Avatar
    Join Date
    Nov 2011
    Location
    lavalette, New Jersey, United States
    Posts
    1,612
    +1
    84
    It's has to be electrical it's not mechanical. Thinking I need a yds and do the running tests.

  8. #7
    Formerly Ultra250 TN Aquaholic6801's Avatar
    Join Date
    Feb 2007
    Location
    Old Hickory,Tn
    Posts
    5,594
    +1
    750
    How many hours?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. FX HO Cruiser 2008 rough idle
    By ldippi in forum Yamaha PWC Performance (4-stroke)
    Replies: 6
    Last Post: 06-28-2009, 06:20 AM
  2. 96 SLX780 Rough Idle, Hard Start, and Miss
    By rickreeves1 in forum Polaris Open Discussion
    Replies: 23
    Last Post: 02-27-2008, 06:43 PM
  3. 94 650 xp rough idle and flat spots
    By hotrod_sxty8 in forum 2-Stroke Performance
    Replies: 8
    Last Post: 05-20-2007, 11:27 AM
  4. Low Rpm and Rough Idle
    By njgprider in forum Yamaha PWC Performance (2-stroke)
    Replies: 1
    Last Post: 10-05-2006, 09:02 PM
  5. rough idle
    By Snoman in forum 4-Tec Performance
    Replies: 10
    Last Post: 07-11-2006, 01:33 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •