Books made today so I can start a more focused approach. Still dont see how the vacuum source from intake brings fuel pressure down…what part is failing…which regulator or pump. No data on why the IAC solenoid is so hot so quick. Why does a plug removed from fuel injector not show some fault. I can squeeze off the IAC hose and bog the engine down and that doesnt code either. Got a lot to learnYour fuel should not drop below 43psi
I did remove the water seperator filter and carefully poured out what I could. Bout a 1/2 teaspoon of untrapped water is all I could capture but yeah I pretty sure this rig has suffered a water intrusion event. And contaminated fuel. I managed to pull my little Optimax out of the grave so I figure I can clean this one up too. Just gonna take a lot more effort this time.Without the engine load reference signal (vacuum) the pump should be pushing about 50psi
I would be looking at inlet restrictions
Well only for testing purposes. I aint about to launch it till all this irractic idle and on plane hesitation and intermttent growling issues are handled. Once I get into the manuals tomorrow I plan to perform a full yearly service event so I can start a record book. All my piddling to this point is more familiarization and experimenting with activities that do or do not yield any changes. I hope to get a few extra filters ordered next pay cycle. My first trip to the boat shop has left a bad taste. They just went nuts on my engine and out drive oil and filter order…and $$$$ wow. I hope the shop guys get some of the loot.You didn't reuse the filter, did you?
Once you pull the fuel filter, you contaminated the clean side
161 is about exactly the temperature your engine block and coolant water temp will be…no doubt having a conductive heat transfer to anything close by or attached to. 160 t stat spec might just about back up my thinking perhaps.Well one way of looking at that is maybe if i break it bad enough the computer will report something or engine will quit bad enough to finally find something to fix. So far any thing I have tinkered with has had no continuous effect (good or bad). I figure the cool fuel pump is screwed anyway and no telling what kind of paint chips are hanging out in the injector rail. A little water aint gonna hurt it now. Any idea on what the ohms reading is on the IAC coil? Cant imagine it getting that hot that quick. A little warm yeah but up to 161*f pretty quick dont feel right.
Never thought of that, thanksThe used stuff makes great chainsaw bar oil