Bad idle hesitating F150 2014 70 hours

[Hasse_231]

Hi there

I bought i boat with an F150 2014 with few hours. The company told me that last owner havent been using it a few years and decided to sell it. The issue was that the fuel was bad. According to the company the took all old gas out. So i did fill it upp with 30 liters. Already from start the enginge did light up the water warning. I shut it down and took out all the fuel and there was still water in the tank. So did flush it. Installed new fuelfilter with seperator and also new engine fuel filter and plugs. I did drain the highpressure resorvar/tank.

But it dosent go 100% at idle it do miss and hesitate.


Can the injectors been bad from the bad fuel. I mean the engine has only 80 hours on it.

I have put injector cleaner and 2 stroke oil without any results..


Any ideas?

New injectors?

[99yam40]

send them off to be tested, cleaned and retested.
you also need to monitor the rail pressure to make sure it is in spec
draining flushing tank may not get all of the water out.
may need to open tank, tilt tank or whole boat so all water goes to one corner to be sucked out, and then mop up any remaining water with rags.
what kind of tank is it?

[Hasse_231]

Its a plastic tank. Also the resorvar have a bottom plug wich i have drained 3 times after clearing all the water.

[Hasse_231]

The engine idle is 600 is that normal or should it be 700?

[Hasse_231]

send them off to be tested, cleaned and retested.
you also need to monitor the rail pressure to make sure it is in spec
draining flushing tank may not get all of the water out.
may need to open tank, tilt tank or whole boat so all water goes to one corner to be sucked out, and then mop up any remaining water with rags.
what kind of tank is it?

Its a plastic tank. Also the resorvar have a bottom plug wich i have drained 3 times after clearing all the water.

[99yam40]

you still need to know if rail pressure is in spec
along with the proper testing and cleaning of the injectors

[Hasse_231]

you still need to know if rail pressure is in spec
along with the proper testing and cleaning of the injectors

I have done a propper testing and have replaced injectors, highpressure pump, vst filter, fuelfilter outside vst, regulator, internal fuelfilter and the fuelfilter im the boat. So the whole fuelsystem is new.

The reason why i changed everything was.. injectors did shutdown under low load a millisecond.. the pressure was 2.4 insted on 2.6 and the fuel pressure was pending up and down so i changed the regulator.


But it didnt solve the whole problem... eventually i did find out that the workshop did put 1.2 l extra engine oil due to the high engine oil in the intake. So after propper cleaning and new plugs it do idle better but not 100% good.

So i did clean the intake with egr cleaning spray while the engine was running as recomended. The engine do run really good at start but when you drive the boat for 30 min its begin to hesitate again... much better compared before changing the fuelsystem.

I have yds and have run it and no fault code at all.

Any ideas where to look?


What can have taken damage due the two problems i had so far?

[Bluefish]

If it's a F150 why are you putting 2 stroke oil in it?
I have put injector cleaner and 2 stroke oil without any results..

[Hasse_231]

If it's a F150 why are you putting 2 stroke oil in it?
I have put injector cleaner and 2 stroke oil without any results..

Only beacuse here in Sweden they have ethanol in the petrol so its so dry.. but for now wirh new injectors i dont.