Fuel restriction help

[muskrat]

1996 J150exer/Check engine light and buzzer going off at 3000 rpm's.Replaced fuel lined in boat and replaced fuel pick up tube & primer bulb.Still getting light and buzzer.Removed fuel chamber,replaced needle and seat and seals.also installed new vacuum switch.Test run with vacuum gauge no air bubbles and little to no vacuum.check engine light and buzzer going off at 4000 rpm.Any suggestion would be helpful Thanks

 

[boobie]

What kind of vacuum are you seeing when you have the vacuum gauged hooked and running at 4000 rpm ??

 

[Chris1956]

Open the cap to the fuel tank. If that fixes it, the fuel tank vent is partially clogged. Pump the fuel primer bulb at high RPM, if that fixes it, maybe the vapor separator or vapor pump are bad.

 

[muskrat]

Im seeing 2 to3 vacuum at 4000 rpm

 

[muskrat]

I will try gas cap.....

 

[Chris1956]

If you are running a built in tank, remove the antisiphon valve as a test to see if that is the issue.

 

[muskrat]

I redid all fuel lines inside boat and pick up valve was already punch out.....

 

[Chris1956]

Did you check/clean the fuel pickup strainer? Sometimes they are inside the pickup tube, like on my SeaRay.

 

[muskrat]

Update 0 to 1 inch vacuum at fuel feed to fiter on float chamber.4 to 5 at fuel fitting were vacuum switch hose hooks too.Vacuum switch new also vapor pump and float & needle and seat.Its got to be in the motor some were thanks for help....

 

[boobie]

Check the fuel lines on the motor for something being broke loose inside.