Fuel Problems?? |
Post Reply |
Author | |
Bradley950
Senior Member Joined: February-07-2005 Location: United States Status: Offline Points: 168 |
Post Options
Thanks(0)
Posted: May-09-2005 at 10:28pm |
When I start my boat it will only run at half throttle . It will not idle. The secondarys are not getting fuel at all?? Its like I am not getting enough fuel. When I remove the fuel line the pump puts out alot of fuel. I just replaced the fuel line from the pump to carb. could this cause a air bubble?? Has this ever happen to anyone else if so how did you fix it???
Thanks -Brad- |
|
Brad Miller
bradley950@yahoo.com |
|
Jim_In_Houston
Platinum Member Joined: September-06-2004 Location: United States Status: Offline Points: 1120 |
Post Options
Thanks(0)
|
Brad,
What engine are you running? What kind of carburator do you have? Did the problem begin all-of-a-sudden? Have you performed any work or maintenance on the engine recently? What year engine / carb do you have? |
|
Happy owner of a '66 and a '68 Mustang
|
|
Bradley950
Senior Member Joined: February-07-2005 Location: United States Status: Offline Points: 168 |
Post Options
Thanks(0)
|
I have a 1976 ski nautique, with a 351w. The carb is a 600cfm holly vac secondaries. The original. As far as maintenance I just put a new hei dist and a edelbrock intake. While doing so I removed the carb no adjustments just set it aside. I am dieing to hear this thing run but all it will do is run reved up. if i back off the throttle it just dies. The timing is correct and it actually runs smooth it just requires alot of throttle to run at all. No low rpm idle. ??????
|
|
Brad Miller
bradley950@yahoo.com |
|
AWhite70
Senior Member Joined: March-05-2004 Location: United States Status: Offline Points: 242 |
Post Options
Thanks(0)
|
Have you checked for vacuum leaks around your new intake manifold? That could cause problems like you're describing.
|
|
Bradley950
Senior Member Joined: February-07-2005 Location: United States Status: Offline Points: 168 |
Post Options
Thanks(0)
|
I tried cheaking for vacuum leaks and found none. Could the intake be leaking on the inside or on the bottom of the intake port? It is not as easy as just slidding the old dist. back in. I had to use the gear off my old one. I think the fire is fine, its a fuel problem. I poored fuel down in the carb. and it will come very close to an idle. For what ever reason the fuel is not coming out of the carb like it should. I dont know guys, I think I will give it a break I am getting frustrated with this thing. I need help! -Brad-
|
|
Brad Miller
bradley950@yahoo.com |
|
79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
Post Options
Thanks(0)
|
If you are expecting the secondary's to open they will not unless it is under a load and sitting still out of gear and reved up is not any load at all. I would open up the idle air screws and adjust the idle and this may take several adjustments before you get it right a vacuum gage will help but you have to get the idle down first before you can adjust it. If the idle is to high then you are pulling it off of the idle cuircut and the adjustments will have no effect. make sure you have no vaccuum leaks first and it can leak around the intake and heads. Make sure it is not leaking around the PVC as well.
|
|
Rob
Guest |
Post Options
Thanks(0)
|
How did you tighten down the intake? What degree timing did you give it?
|
|
Bradley950
Senior Member Joined: February-07-2005 Location: United States Status: Offline Points: 168 |
Post Options
Thanks(0)
|
Well problem solved. I used smoke to find a small leak where my spacer meets the intake. This was a very small gap, so small you couldn't see or hear the leak. Just as you all
suspected the fuel was not being pulled into the intake due to a vacumm leak. The motor now very peppy and revs very fast. There will be a water test tomarrow. Thanks agian guys for all your help. I will let you know how it pulls. -Brad |
|
Brad Miller
bradley950@yahoo.com |
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |