User Tag List

Thanks Thanks:  0
Likes Likes:  0
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 23

Thread: 2.4l high idle?

  1. #1
    Join Date
    Oct 2008
    Location
    longisland ny lindenhurst
    Posts
    530
    Thanks (Given)
    15
    Thanks (Received)
    8
    Likes (Given)
    80
    Likes (Received)
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Question 2.4l high idle?

    What's going on guys.I got a slighb issue with one of my engines I just built.she's a carbed bridgeport and when I fired her up for the first time she has a high idle around 2g.when I pull the trigger arm all the way back towards the carbs it still has a high idle around 1500rpms.idk if it has anything to do with timing and a stator problem if any one got any pointers I would appreciate it alot thanks guys!
    16ft superboat
    14ft vixan
    15ft viper
    24ft sleekcraft
    21ft sleekcraft modvp
    18ft action hst drag
    18ft accelerator drag
    21ft redline
    18ft vking yt 300 yamaha!


  2. #2
    Join Date
    Oct 2003
    Location
    Albany NY
    Posts
    1,674
    Thanks (Given)
    0
    Thanks (Received)
    1
    Likes (Given)
    0
    Likes (Received)
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    First thing I would look for is a vacuum leak!

  3. #3
    Join Date
    Oct 2010
    Location
    Harrisburg,Pa
    Posts
    1,758
    Thanks (Given)
    2
    Thanks (Received)
    18
    Likes (Given)
    14
    Likes (Received)
    53
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Or a leak in the primer,are all carb butterflys closed tight. If so you got a air leak,did you surface all the cases flat. They are always warped,don't think I ever rebuilt a motor that didn't have warped cases.
    Last edited by perfmarine1; 08-09-2013 at 07:57 AM.





  4. #4
    Join Date
    Oct 2008
    Location
    longisland ny lindenhurst
    Posts
    530
    Thanks (Given)
    15
    Thanks (Received)
    8
    Likes (Given)
    80
    Likes (Received)
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by perfmarine1 View Post
    Or a leak in the primer,are all carb butterflys closed tight. If so you got a air leak,did you surface all the cases flat. They are always warped,don't think I ever rebuilt a motor that didn't have warped cases.
    Carbs are closed.I checked the cases winter 2012 and they were all level.being that I have a 2000rpm idle what about spraying a light mist of water onto the intake to see if the rpms drop?now idk if timing would cause a high idle unless its totally out of wack?
    16ft superboat
    14ft vixan
    15ft viper
    24ft sleekcraft
    21ft sleekcraft modvp
    18ft action hst drag
    18ft accelerator drag
    21ft redline
    18ft vking yt 300 yamaha!


  5. #5
    Join Date
    Feb 2009
    Location
    Edgewater,B.C. CANADA
    Posts
    6,979
    Thanks (Given)
    83
    Thanks (Received)
    128
    Likes (Given)
    1460
    Likes (Received)
    551
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Have you done a full link and sync?

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  6. #6
    Join Date
    Oct 2008
    Location
    longisland ny lindenhurst
    Posts
    530
    Thanks (Given)
    15
    Thanks (Received)
    8
    Likes (Given)
    80
    Likes (Received)
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dave Strong View Post
    Have you done a full link and sync?

    Dave

    Link and sync as in?the carbs are all sync'd together to close the same.when I get home I wanna go over my timing and I'm going to check my idle timing also.do you know what that should be set at?
    16ft superboat
    14ft vixan
    15ft viper
    24ft sleekcraft
    21ft sleekcraft modvp
    18ft action hst drag
    18ft accelerator drag
    21ft redline
    18ft vking yt 300 yamaha!


  7. #7
    Join Date
    Feb 2009
    Location
    Edgewater,B.C. CANADA
    Posts
    6,979
    Thanks (Given)
    83
    Thanks (Received)
    128
    Likes (Given)
    1460
    Likes (Received)
    551
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No the full thing, check timing pointer position, carbs, max and idle timing.
    Make sure the trigger wire harness allows for free and full movement.


    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  8. #8
    Join Date
    Oct 2010
    Location
    Harrisburg,Pa
    Posts
    1,758
    Thanks (Given)
    2
    Thanks (Received)
    18
    Likes (Given)
    14
    Likes (Received)
    53
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    With butterflys shut you set the Idle Rpm by adjusting the timing,increase timing increases rpm. What is critical is wot timing and pick up timing that is when throttle is picked up by throttle cam. Yes When you rebuild a motor the timing is usually set hi for idle because of a old inefficient motor,when it is fresh you will need to lower timing to make it idle slower cuz it's working like it should. If you did everthing right.





  9. #9
    Join Date
    Oct 2008
    Location
    longisland ny lindenhurst
    Posts
    530
    Thanks (Given)
    15
    Thanks (Received)
    8
    Likes (Given)
    80
    Likes (Received)
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I brought the boat over to a buddy of mine IPM.Timing was at 28 degres.I set it to 24.still had a high idle around 2000rpm.ending up being the middle carb was just alittle out of sync with the rest.we re sync'd carbs now engine idles at 950ish on a garden hose.thanks guys for the advice!!now its time to brake this bad bi*ch in ;-)
    16ft superboat
    14ft vixan
    15ft viper
    24ft sleekcraft
    21ft sleekcraft modvp
    18ft action hst drag
    18ft accelerator drag
    21ft redline
    18ft vking yt 300 yamaha!


  10. #10
    Join Date
    Oct 2010
    Location
    Harrisburg,Pa
    Posts
    1,758
    Thanks (Given)
    2
    Thanks (Received)
    18
    Likes (Given)
    14
    Likes (Received)
    53
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by 16ft superboat View Post
    I brought the boat over to a buddy of mine IPM.Timing was at 28 degres.I set it to 24.still had a high idle around 2000rpm.ending up being the middle carb was just alittle out of sync with the rest.we re sync'd carbs now engine idles at 950ish on a garden hose.thanks guys for the advice!!now its time to brake this bad bi*ch in ;-)
    Kinda figured it was that.





  11. #11
    Join Date
    Oct 2008
    Location
    longisland ny lindenhurst
    Posts
    530
    Thanks (Given)
    15
    Thanks (Received)
    8
    Likes (Given)
    80
    Likes (Received)
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Counted my chickens too soon.engine idles perfect but now it sounds like its loading up with fuel or falling on its face at 4g.timing was set to 24 degres so I'm I don't think that's it.maybe losing a bank of cyl at WOT?any advice guys?
    16ft superboat
    14ft vixan
    15ft viper
    24ft sleekcraft
    21ft sleekcraft modvp
    18ft action hst drag
    18ft accelerator drag
    21ft redline
    18ft vking yt 300 yamaha!


  12. #12
    Join Date
    Feb 2009
    Location
    Edgewater,B.C. CANADA
    Posts
    6,979
    Thanks (Given)
    83
    Thanks (Received)
    128
    Likes (Given)
    1460
    Likes (Received)
    551
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You rebuilt the motor did you rebuild the carbs???

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  13. #13
    Join Date
    Oct 2008
    Location
    longisland ny lindenhurst
    Posts
    530
    Thanks (Given)
    15
    Thanks (Received)
    8
    Likes (Given)
    80
    Likes (Received)
    121
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dave Strong View Post
    You rebuilt the motor did you rebuild the carbs???

    Dave

    Carbs hasn't been touched since last summer.I tried smaller jets 82s 84s still had no change
    16ft superboat
    14ft vixan
    15ft viper
    24ft sleekcraft
    21ft sleekcraft modvp
    18ft action hst drag
    18ft accelerator drag
    21ft redline
    18ft vking yt 300 yamaha!


  14. #14
    Join Date
    Feb 2009
    Location
    Edgewater,B.C. CANADA
    Posts
    6,979
    Thanks (Given)
    83
    Thanks (Received)
    128
    Likes (Given)
    1460
    Likes (Received)
    551
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Not trying to be a smart azz, but you spent all that money building the engine. JMO spend a couple bucks and make sure what feeds that new engine is just as new??? With all the Ethanol problems that seem to come up one would think its the way to go.

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

  15. #15
    Join Date
    Aug 2005
    Location
    Stockton, California
    Posts
    308
    Thanks (Given)
    0
    Thanks (Received)
    0
    Likes (Given)
    0
    Likes (Received)
    0
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Dave you nailed it.... I have a Bridgeport carb motor and an EFI motor....you can't rebuilt the carbs or have the injectors cleaned to often...The fuel is taking its toll and better safe that sorry for $150.....I will say I am going broke running the EFI...Fuel mileage is horrible but what can one expect running a motor at 7500-8000....LOL

Page 1 of 2 1 2 LastLast

Tags for this Thread

Posting Permissions

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