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Engine alarm on and fuel pump running continuously after turning key on

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Lyman713

New member
I have a 2002 Sea Ray Sundancer 260 that died while going slow (about 5mph) last week and it wouldn't start after (no engine alarm, no fuel pump running a couple of seconds after turning the key on). We were towed back to the dock.

Now,when I turn the key on, nothing happens for about a minute, then the pumps and engine alarm turn on and run continuously (stopping for a second every 10-30 seconds). I don't do anything while waiting for the alarm/pump after turning the key (no wire jiggling, etc...).

The engine (Mercruiser, 2002, 6.2MPI, OM338292) will turn over and will start / run / sputter at WOT and shuts off at neutral...like it is starving for fuel...

I get about 40-42 psi at the fuel rail once the alarm/pumps come on and the pressure holds when I turn the key off.

There is a new fuel filter and water separator.

Any thoughts?

Thanks in advance!
 
Im not an expert at all, but if your engine has a similar setup as a 4.3l carb. Im guessing you have an oil pressure switch. On the 4.3l that controls power to the fuel pump. My oil pump switch was corroded and was causing there to be no power to the fuel pump. However, when you start the engine..power is supplied by the starter to the fuel pump....so you get fuel at start up. It will run until the fuel runs out in the carb. Or maybe your case the fuel rail.

You may have a completely different setup...but i thought Id at least share.. If you do have an oil pressure switch you can jump the two wire that are plugged into it together and try to run her....or you could always use a voltage meter on the fuel pump connector to see if you are receiving 12volts after she starts.
 
Totally different set up............MPI 6.2 liter NOT a 4.3 carbed motor.

No comparison................



halltrail said:
Im not an expert at all, but if your engine has a similar setup as a 4.3l carb. Im guessing you have an oil pressure switch. On the 4.3l that controls power to the fuel pump. My oil pump switch was corroded and was causing there to be no power to the fuel pump. However, when you start the engine..power is supplied by the starter to the fuel pump....so you get fuel at start up. It will run until the fuel runs out in the carb. Or maybe your case the fuel rail.

You may have a completely different setup...but i thought Id at least share.. If you do have an oil pressure switch you can jump the two wire that are plugged into it together and try to run her....or you could always use a voltage meter on the fuel pump connector to see if you are receiving 12volts after she starts.
Click to expand...
 
kghost said:
Totally different set up............MPI 6.2 liter NOT a 4.3 carbed motor.

No comparison................
Click to expand...

Yep - different set up. So, it is reproducible - turn the key and wait about 30 seconds of silence and the engine alarm comes on with the fuel pumps. Pumps run and run, turn off (alarm and pump) for a second, and run more.

Could it be the fuel pressure regulator on the rail? Thinking it is letting 40 psi build up, but not to 43 psi to shut down the high pressure pump?

Anyone know what this pressure regulator does exactly? I'm looking locally for a new one now...

Thanks again!
 
kghost said:
Totally different set up............MPI 6.2 liter NOT a 4.3 carbed motor.

No comparison................
Click to expand...


Since you take the time to chastise him for trying to help, sure would have been nice if you woulda took the time to try and help the OP....... or do you have no idea, and just thought you would take the oppurtunity to try and make him look bad........
 
Now come on guys, I'm sure Kghost was on limited time while making that post because when he can time wise he is very helpful on this boating forum giving very long replies with what to look for and how to go about something to try and help. Like me when I only have a few minutes to spare, i'll log in and read to see what's going on while providing either no or very short replies before shutting down the computer. Lyman713, Sounds more like you have an electrical problem and not a fuel pressures problem. The first thing you'll want to do is check all the wiring, wiring connectors and battery cables to ensure they are clean, tight and making good contact where needed. Also be sure no wire pins are backing out of their plug connectors. Also with the key on, start wiggling wires and battery cables abound both at the engine and under the dash to see if the problem becomes apparent to you. If you find no problems with bad wiring, then you will need to test the 12 volt system to see where the bad connection is. If nothing found there, then it could also be a bad ECM. Here is some info about your engine model. Good luck.:)http://www.crowleymarine.com/search_results.html?string=OM338292
 
halltrail said:
"Im not an expert at all"; "Or maybe your case the fuel rail.";

"You may have a completely different setup...but i thought Id at least share.."
Click to expand...

As you can see from my quotes, I was sure they were different setups and I knew I had a carb and he didnt; however, since no one had posted a response in 24 hours. Id thought Id share my experience just in case there were some similarities.

No worries on my end...I have thick skin...kghost posted up some helpful thoughts on my question in another post.

Good luck to the OP. Hope you post back up what the problem was.
 
Thanks for the replies! I thought about wiring, but it's odd how, when I turn the key, nothing happens for 20-30 seconds, then the alarm starts up and the fuel pumps start running... without any jiggling of wires or anything (just standing there still). I suppose it still could be wiring... I assume low voltage to a fuel pump would cause it to pump too low a pressure... Are the two wires going to the pump +12V and -12V? I can check the voltage at both pumps and at the parker simmons valves as well (the lines run from the valves to the pumps).

Thanks again!
 
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