Engine shut down

[mark duprey]

Have an 05 340 DA with 8.1's after running about 30 minutes port engine shuts downs, after 15 minutes will restart and run at rpm above 1500 but as soon as I reduce engine to 900 for docking it shuts down. In first 30 minutes all is fine. Smart craft shows a flashing gas pump but no other code

 

[yv1]

Try replacing the IAC ( Idle speed control valve ). Its less than $100. Very common on 8.1s,

 

[mark duprey]

Thanks, already tried that.

 

[yv1]

Mark, it looks to me that the engine runs well when cold. First 30 minutes.(The engine temp gauge is coolant temp. Not the temp around other components). Cool down for 15 min and it works at high RPM. Have you scanned the ECU for codes?
If you can get a Rinda Tech scan tool you'll be able to read the data from the engine while is running. You'll be able to see what is wrong at that particular moment that it shuts down.
It could be a fuel pressure problem after pump gets warm. Switch pumps from one engine to another. I would also try new fuel filters.

 

[mark duprey]

Mark, it looks to me that the engine runs well when cold. First 30 minutes.(The engine temp gauge is coolant temp. Not the temp around other components). Cool down for 15 min and it works at high RPM. Have you scanned the ECU for codes?
If you can get a Rinda Tech scan tool you'll be able to read the data from the engine while is running. You'll be able to see what is wrong at that particular moment that it shuts down.
It could be a fuel pressure problem after pump gets warm. Switch pumps from one engine to another. I would also try new fuel filters.

Thanks YV1 that's helpful, I'll try filters and switching pumps before taking a Tech with a scan tool for a ride. Dumb question but is fuel pump in cool fuel module as is filter?

 

[yv1]

I'm not sure about the 2005 model. Mine only have a water separation filter attach to the engine and an inline filter on the gas line. I think 2005 was the first year with the filter inside the fuel module that is recall because the paint inside the module peal out and clog the filters. There is more info about this recall online.
Also I think we have two fuel pumps. One on top of the gas tanks. Another on the engine.

 

[LG111]

I had the same issue. but no codes. turned out to be the crank shaft sensor was bad.

 

[mark duprey]

Thanks for help all. Turns out it was the cool fuel module. Water ports were restricted by gunk not allowing water to circulate, thus causing fuel pump to overheat (my diagnoses) right or wrong at least it works!!