Both, In gear or in neutral (tried it both ways), when I get to the 2000 rpm mark, the engine alarm beeps and goes into guardian mode.
Both, In gear or in neutral (tried it both ways), when I get to the 2000 rpm mark, the engine alarm beeps and goes into guardian mode.
Ok. So given what you’ve said so far. I’m thinking this is a sea water pressure sensor issue or a genuine low water pressure or overheat as a result of. Look at the vessel view indications when it’s running. Check the water pressure and temperature reading. Check all readings. If one of them is not showing or showing out of the acceptable range…that’s the issue.
Serial numbers start with a number (up to about 2008 it was '0', after that it was a '1', not sure when they got to '2')...
3,000rpm.
Chris much appreciated with the video. I also thank everyone else who assisted. Just wanted to provide an update. I spoke with my mechanic and decided to change the impeller, but it was in perfect condition and was not the issue. I also used half of a 55 gallon plastic drum to submerge the lower unit it to see if it was possible that it was because I was running it on muffs. Unfortunately, the same issue happened around 2500 rpms this time. As much as I was determined to fix this issue on my own, especially with the help of a great community like this, I think I may have to have a marine mechanic hook up their laptop to my engine as I am beaten, broken, and defeated lol. I am hopeful he's going to come back and say its something inexpensive such as spark plugs. The last question I had for you guys if anyone could provide their expertise is, would I receive an error code on the vessel view mobile, if the cap and distributor were not working correctly? Cause truly that my last guess.
One other question, which I dont think will cause it to do what it is doing is, I changed the IAC valve, and removed the muffler from within the throttle body (little white piece of sponge, which was black as the ace of spades) and never replaced it.
Not sure if I mentioned it earlier in the post…because I go on about it all the time…but the diz cap on these are famous for messing things up…and don’t show anything in terms of faults usually. I’ve had 5 of them mess things up on my mpi. Can do anything from not start randomly…to just not performing at all. Absolutely thee most common cause of bother for an mpi cleaning them up can get you out of trouble short term, if you’re very lucky…but ultimately they need replaced often. They especially show their hand at the start of the season after winter storage. So common.
But to go into guardian mode? I’ve had trouble with it once in the past, but didn’t go into guardian mode.
Yea it’s going to the mechanic next week to have it hooked up to the computer
Is it not varying in rpms this time around. Up to 2500 ?
Yeah. Lots of things you can select and make your own custom page of data read outs.
A series of beeps. Sometimes the beep code will point you in the right direction... Or it could lead you up the garden path.
No, they do not talk to ECM
My thinking is that if the pcm is responsible for the low rpms, it's responding to sensor input. Any grown up pcm *should* throw a code, but there are few enough sensors that they should be able to have their values monitored manually in live view. How about knock sensor? Have we checked spark advance?A series of beeps. Sometimes the beep code will point you in the right direction... Or it could lead you up the garden path.
Chris..
I'd be interested to see spark advance pre and post guardian mode at similar rpms. Most of that info isn't particularly interesting. What's the value below oil pressure? Water pressure? Was the boat warmed up? Water temp is cold and didn't rise.
