Print Page | Close Window

5.7 APEX Rough Idle Printed From: CorrectCraftFan.com Category: General Correct Craft Discussion Forum Name: General Discussion Forum Discription: Anything Correct Craft URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=36609 Printed Date: May-03-2024 at 10:13am Topic: 5.7 APEX Rough Idle Posted By: Nautique 64 Subject: 5.7 APEX Rough Idle Date Posted: June-30-2015 at 6:27pm This past fall I bought a really nice low hour 2002 Ski Nautique to have a little something more friendly for my wife to pull me than my trusty 64. Starts and runs great but the idle quality seems a little rough and not what I would have expected from a fuel injected engine. Thjs is the PCM 5.7 Apex with the different looking intake and injection set up. Never stalls it just runs rough at idle and low speeds. I pulled the plugs and all but a couple showed indications of running rich. I suspect I may have some injectors that are not atomizing the fuel well a low speed but don't know how the verify that is the problem. I also don't know if maybe these engines have enough cam that they just don't idle nicely.. Can anyone out there tell me if my expectations of this engine idling like my 64 sewing machine are wishful thinking. Also I have not been able to find much comprehensive information or manuals on this ejection system. Can anyone point me to a good source of a manual. Thanks Terry ------------- Nautique 64 Ski Nautique 2002 Replies: Posted By: phatsat67 Date Posted: June-30-2015 at 6:59pm Take a good look at the insides of the distributor. Those are known to fail in automotive world and take out the coil along with it. We had one that was a problem child for years and that is what solved it. New Dizzy and coil and it was in business although it still doesn't idle as smoothly as a GT-40 or carb Ford. I suspect this one has worn valves being that it has a few hours on it. ------------- Posted By: Nautique 64 Date Posted: July-01-2015 at 8:45pm Thanks and will take a look. ------------- Nautique 64 Ski Nautique 2002 Posted By: JoeinNY Date Posted: July-02-2015 at 1:58am 12 years old and low hours... I would be running fuel injector cleaner in every tank.    ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video Posted By: Nautique 64 Date Posted: July-06-2015 at 9:24pm Thanks and good advice. Does anyone have a favorite cleaner they would recommend using. ------------- Nautique 64 Ski Nautique 2002

Print Page | Close Window