2 beeps. No guardian mode

[kriskussee 9]

Same problem, 2 beeps every few minutes everything fine all gauges working, PP fine, Depth alarm turned off, replaced IAC valve didn't solve the problem - its my hey "check the gauges" alarm right now - 1 dealer stumped, 2 others say bring it down well fix it or not charge you

[Pildo 6]

I had had 2 beeps every minute. It was the water pressure sensor on the transmission cooler. I had to have alarm cleared after new sensor installed. Guardian mode kicked in around 4500 rpm.

[gravity12 83]

I have the notorious 2 beeps every 60 seconds. Probably the water sensor but made a appointment with the best guy in town on monday. I hade some issues before the beeps and replaced the cap rotor and fuel filter and strainer. Problem mostly went away but at about 4500 rpm it was still stuttering. Stop ed and pulled my son on the wake board and all of the sudden I started getting 2 beeps every 60 sec. I would just replace the sensor but at this point I need it fixed the first time. He is going to run all the test for sensors and oil and fuel. I will let you all know how it turns out. good luck.

[scottk1826 0]

I have an 07 Avalanche with the 5.7 Mercruiser Scorpion (190 hours) and I just started have the same 2 beep sequence two weekends ago. Since the beeping started, the engine will not idle without going dead and I can't start the engine without giving it throttle while cranking. Runs fine once going faster than idle though and all gauges read normal, v-drive light goes off when above 1200rpm, depth gauge warning is off, and Perfect Pass is working correctly. Called my Mercruiser shop and he said to bring it in so they can hook computer to it and read the error codes. Taking it this coming Saturday, so I'll see if he gets an error code about the water pressure sensor. kriskussee above mentions the IAC valve but I didn't know what that was, so internet search revealed it is the Idle Air Control valve or Idle Speed Control, which sounds like that might be my problem. One of the links to the wakeboarder forum mentions the oil pressure sensor might be unplugged and also suggests checking the ground wire. The mechanic on the JustAnswer link mentions that the 2 beeps (double tone) indicates a sensor that is reading outside of its normal parameters. I will post the resolution to my problem when resolved if I can just remember to come back often to this forum. Thanks.

[gravity12 83]

For anyone interested my tech got ahold of me this afternoon and it was the water flow sensor causing the two beeps. He also checked for other stuff that could cause the 4500 rpm stutter and found that my high pressure fuel pump was putting out 10 psi less than it should. So I was running lean on the top end. Not what I was hoping for as my bill is going to be bigger than I thought but at least I should be up and running 100% now.

[WakeDirt 19]

I have an 07 Avalanche with the 5.7 Mercruiser Scorpion (190 hours) and I just started have the same 2 beep sequence two weekends ago. Since the beeping started, the engine will not idle without going dead and I can't start the engine without giving it throttle while cranking. Runs fine once going faster than idle though and all gauges read normal, v-drive light goes off when above 1200rpm, depth gauge warning is off, and Perfect Pass is working correctly. Called my Mercruiser shop and he said to bring it in so they can hook computer to it and read the error codes. Taking it this coming Saturday, so I'll see if he gets an error code about the water pressure sensor. kriskussee above mentions the IAC valve but I didn't know what that was, so internet search revealed it is the Idle Air Control valve or Idle Speed Control, which sounds like that might be my problem. One of the links to the wakeboarder forum mentions the oil pressure sensor might be unplugged and also suggests checking the ground wire. The mechanic on the JustAnswer link mentions that the 2 beeps (double tone) indicates a sensor that is reading outside of its normal parameters. I will post the resolution to my problem when resolved if I can just remember to come back often to this forum. Thanks.

Ever find the issue with the beeps?

[scottk1826 0]

Answer to WakeDirt, my boat is still at the shop after two weeks. I have called several times to check on it and they are so backed up that they still haven't even connected the computer to it to diagnose the problem. Was really hoping to surf the 4th of July weekend, but such is my luck. I am almost ready to buy my own diagnostic cable and software! I hope to report back soon what was wrong.

[scottk1826 0]

Finally got my boat back last Saturday! Shop owner said they replaced the Idle Air Control valve to correct the idling problem and no other codes showed up on the computer. Put the boat in the water and cranked it up and it idles fine now, but I still have the two beeps about every minute. We surfed for a couple of hours, then later I opened it up and started having the same stuttering/skipping around 4200 rpm's as Weekender mentioned. Shop was closed this week for vacation so I can't take it back yet to see if their computer will show if any new codes were generated. Anyone have a web link to a free service and/or parts manuals for the Mercruiser Scorpion?