Page 1 of 3 123 LastLast
Results 1 to 10 of 25
  1. #1
    spouk3's Avatar
    Join Date
    Mar 2012
    Location
    Montreal, QC, Canada
    Posts
    636
    +1
    30

    VT11 8650 cold start issue

    Hey guys, since I changed my injectors and flash the VT11 8650rpm tune I have a ruff start issue when engine is cold... It sounds very ruff and it shake like it's knocking a lot... Ill try to catch a video later to help... Does someone had the same ruff start issue with this tune?

    Ho, and after a second or two, it's running great at 1700rpm steady and the rest is very good, since everything is tuned with the datalogger!

    Thanks!


  2. #2
    SLASHER's Avatar
    Join Date
    Jun 2007
    Location
    Australia, Perth WA
    Posts
    3,272
    +1
    476
    I have same tune and injectors and no issues ..

    Try changing plugs , is base fuel pressure at 58 psi ?

  3. #3
    spouk3's Avatar
    Join Date
    Mar 2012
    Location
    Montreal, QC, Canada
    Posts
    636
    +1
    30
    Base fuel is 58psi... I'll change the plugs... They did a couple run before I realized my intercooler was throwing water in my engine so... Plugs are a good start...

  4. #4
    Bounty Hunter Carlos Thomas's Avatar
    Join Date
    Jul 2007
    Location
    San Leandro, CA
    Posts
    1,402
    +1
    22
    I want to say that I noticed that also. I run the VT11 8350 Tune. I will confirm it this weekend. Prior to the install, it would fire up and lock in on 1700 RPM right away. I want to say now on a cold start it was at 1600 then moved to 1700 after a few short seconds. Or it was north of 1700 and came down. But I will confirm tomorrow afternoon (California Time). My plugs were changed at 98 hours (Complete Oil Change Service) in May. I am at 113 hours now.

    I will say this...unless you are looking for it, then most people will not notice the start of the motor. Where I launch from normally, I have to idle for about 2 to 3 minutes to get out of the no wake zone. By then, my motor is ready. I normally ride it for 2 minutes after that at maybe 75% throttle at the most. Then I ride it like a stole it. That is my normal playbook.

    When I used to race, I wanted a cold motor so I can have no heat soak for that holeshot.

  5. #5
    spouk3's Avatar
    Join Date
    Mar 2012
    Location
    Montreal, QC, Canada
    Posts
    636
    +1
    30
    I'll check plugs today... But I'm sure it was OK prior to VT11 tune/injectors... And it's only for a second or two when I crank the engine... Too much fuel/too rich when starting? I'll make a log and post here later!

  6. #6
    Bounty Hunter Carlos Thomas's Avatar
    Join Date
    Jul 2007
    Location
    San Leandro, CA
    Posts
    1,402
    +1
    22
    BTW, how many RPM's are you turning with your setup and where are you in terms of speed (on the GPS)?

  7. #7
    spouk3's Avatar
    Join Date
    Mar 2012
    Location
    Montreal, QC, Canada
    Posts
    636
    +1
    30
    Was turning 8560 earlier this summer... Had a lot of issues (intercooler and injectors) was running 75mph GPS now down to 73mph it's very hot and 80% humidity

  8. #8
    spouk3's Avatar
    Join Date
    Mar 2012
    Location
    Montreal, QC, Canada
    Posts
    636
    +1
    30


    From left to right cyl: 3-2-1

  9. #9
    formerly Gold06RXP Turbo Nick's Avatar
    Join Date
    May 2007
    Location
    Dayton, OH
    Posts
    2,095
    +1
    97
    Is there a cold start table in the tuning software?

  10. #10
    spouk3's Avatar
    Join Date
    Mar 2012
    Location
    Montreal, QC, Canada
    Posts
    636
    +1
    30
    Yes, vtech software have a cold table

Page 1 of 3 123 LastLast

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Cold start issues
    By islandcre8tion in forum Kawasaki How To & FAQs
    Replies: 4
    Last Post: 08-19-2016, 09:19 PM
  2. 06 STX 15F Cold Start Idle Issue
    By c.anstead7 in forum Kawasaki PWC Performance (4-stroke)
    Replies: 1
    Last Post: 05-22-2014, 11:27 AM
  3. Cold start issue with 2002 Virage TXi
    By evowagon in forum Polaris Open Discussion
    Replies: 33
    Last Post: 01-29-2014, 10:51 PM
  4. Cold/Hot start issue/trouble. Garage smell. Tank venting? Check valve failure?
    By ZeroClient in forum Yamaha PWC Performance (2-stroke)
    Replies: 2
    Last Post: 06-29-2013, 04:12 PM
  5. Cold start issue
    By nau in forum Polaris Open Discussion
    Replies: 35
    Last Post: 06-28-2009, 10:45 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
  •