Results 1 to 6 of 6
  1. #1

    2004 MSX150 - 5650 RPM limit, Gap in Service Manual??

    I have 2004 MSX150 with 20hrs. Engine won't run above 5600-5650 rpm. The turbo display on dash shows 1/2 boost (graphic is right in middle). Wastegate is free and can move by hand. Service manual says guides when various rpm limits are hit. Under mine (5,000 rpm???) says to check boost control, etc. Over mine (6,000 rpm) says to check knock/premium gas. However, there is no quide around my problem area. Any suggestions? Oil level is in correct range just over min. Thanks!

  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
    Join Date
    Jul 2007
    near Toronto, Canada
    Cylinder compression?

  3. #3
    I doubt there is engine damage as plugs looked great. I will check this to verify next weekend. Good point!

  4. #4
    I should have mentioned that the ski has been warmed up and run quite a while and still has limited RPM. Also, I doubt low compression as it accelerates good until 5650.

  5. #5

    Join Date
    Apr 2010
    Stamford CT
    Around this rpm with no check engine light or other known issues the problem is most likely a boost leak. Check all the hoses and clamps in the intake system, also check the bov and its associated hoses. And finally, check the isolator gasket under the throttle body. Check it for a crack or tear, if there is one it will likely be virtually invisible to see. Spraying some WD40 on it and wiping it off with a rag worked for me. The WD40 finds its way into the crack but the rag only cleans the surface leaving the WD40 in the crack to seep out.

  6. #6
    ride04msx, you are right. I found the loose clamp today and it runs great again. Can't figure out how I overlooked it before, but oh well.. thanks!

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Service Manual
    By JET250 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 1
    Last Post: 05-15-2008, 11:19 AM
  2. reverse rpm limit 03 msx 140
    By boosis in forum MSX/Matrix
    Replies: 1
    Last Post: 10-14-2007, 05:09 PM
  3. Srping Washer Service Limit>>>
    By REID2168 in forum 4-Tec Performance
    Replies: 14
    Last Post: 08-07-2007, 04:18 PM
  4. RXP 2004 Service Manual book (pdf)
    By branix in forum 4-Tec Performance
    Replies: 0
    Last Post: 07-29-2007, 01:44 PM
  5. 2004 Msx150
    By dt3257 in forum Polaris Open Discussion
    Replies: 1
    Last Post: 05-02-2007, 12:11 AM

Posting Permissions

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