2004 SAN Low RPM issue
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=50796
Printed Date: January-29-2025 at 11:24pm
Topic: 2004 SAN Low RPM issue
Posted By: Nautique Fan
Subject: 2004 SAN Low RPM issue
Date Posted: July-28-2022 at 5:49am
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I recently purchased a 2004 Super Air 210. I have been having issues with it cutting off if you push the throttle up around 1000RPM or if you pull the throttle back to idle from a high RPM range. It seems if I can get past the low RPM, the boat runs fantastic. I do have to put the boat in Nuetral and give it gas to get it to start. Usually pumping the gas to just about wide open throttle. But, once it is running it will idle all day long. Here is what I have tried so far: Full tank of gas -2 cans of sea foam Cap, rotor and spark plugs Replaced FCC filter Any help would be appreciated. Thanks ------------- 1997 Nautique Super Sport 1989 Ski Nautique 2001 (Sold) |
Replies:
Posted By: KENO
Date Posted: July-28-2022 at 7:50am
Kinda funny............there's a guy on PN BNauti having the same issue with the same boat  , But at least he told what the engine is (a 330 Excalibur ) and he's thinking about throwing a low pressure fuel pump at it. If it runs great at higher speed and can idle all day long, why would you think it was pump related? You should get a fuel pressure gauge and check the pressure as a starting point anyways. Then you're probably into a situation where you're trying to figure out which sensor or computer controlled component may be broken or need adjustment.
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Posted By: KENO
Date Posted: July-28-2022 at 8:43am
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I think your engine uses GM's MEFI-4 injection system. Here's a link to lots of reading in a MEFI -4 manual http://www.pirate4x4.com/d1/tech/billavista/MEFI/MEFI%204%20&%204B%20DIAGNOSTIC%20MANUAL%20%28L510005P%29.pdf" rel="nofollow - link
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Posted By: Nautique Fan
Date Posted: July-28-2022 at 9:10am
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Thanks for the manual. As KENO said I should have put the engine in the post. 330 Excalibur the boat only has 268hrs on it. ------------- 1997 Nautique Super Sport 1989 Ski Nautique 2001 (Sold) |
Posted By: Nautique Fan
Date Posted: July-30-2022 at 10:12am
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Well we spent most of yesterday troubleshooting. I cleaned the throttle body first. No changes. then I took it to my buddies house with a 2005 Super Air Nautique and we started swapping parts from his good running boat. (Yes I’m very lucky that my best friend let me take his perfectly running boat apart and put on my boat). We changed out the TPS sensor, no changes. We changed out the idle air sensor and no change. We put the anti siphon valve in the ultrasonic cleaner and cleaned it up. I did notice that his boat idles a little higher than mine. Is there an idle adjustment somewhere? Also, if you go from full throttle on mine back to idle and full throttle again it will cause it to backfire two times. I’m not sure why it does this? It kind of makes me think it is getting fuel and then the spark comes back in? I’m taking guesses at this point. open to suggestions? Thanks ------------- 1997 Nautique Super Sport 1989 Ski Nautique 2001 (Sold) |