Yam 2007 F150 runs and stalls repeatedly at idle or little more

FrenchFry

Seaman
Joined
Nov 13, 2009
Messages
73
Just went to test this engine recently installed and it was not a success

Since we did not have time to test it for real until now we used to start it in the port and let it run during some time, up to a hour, did not notice anything until yesterday where it stalled after 5mn at idle

Then today we tried to test it at sea but it started to stall after 10 mn at 800 rpms, restarted ok then stalled again 2mn after, restarted ok then stalled again after 1mn, etc, until we decided to go back since it was stalling too often to do anything, and each time the running period was reducing, waited a little bit that the engine cools down, restarted ok and then stalled again 15mn after back in the port

We were on the river going to the sea so could not test what would happen at higher rpms, self diagnosis code at the gauge says everything is normal, no buzzer, nothing, normally it starts without using the fuel bulb, we pumped on it and the fuel bulb was still hard after stall (normal?)

Most of the posts are mentioning stalling issues while going from idle to higher rpms or vice versa, here that's not the case and it seems like it's happening and getting worse and worse when the engine is hot, what could it be?
 

FrenchFry

Seaman
Joined
Nov 13, 2009
Messages
73
Could it be that this is just a stupid fuel line issue? Thinking about it the behavior is the same than when you close the fuel and wait for the enging to die consuming the fuel that is already inside, maybe the fuel flow is not correct so the engine consumes everything, dies, then waiting for some time some fuel is coming in, restart, run and dies after consuming everything again, etc, apparently the more we waited between two restarts, the longer it ran and I believe the fuel bulb should not stay hard
 
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