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1991 Nautique Excel PCM 5.8L |
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TimN 
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Joined: May-09-2022 Location: Alabama Status: Offline Points: 14 |
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 Topic: 1991 Nautique Excel PCM 5.8LPosted: May-25-2022 at 10:54am |
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My 1991 PCM 5.8L is surging while under throttle at 3,000 RPM. Seems like it is not running at full efficiency then all of sudden it is fine then drop back down again. I just had new plugs, wires, carb cleaned etc...
Any suggestions? Tim
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KENO
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Joined: June-06-2004 Location: United States Status: Offline Points: 11112 |
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Posted: May-25-2022 at 2:04pm |
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Do you have a distributor or the protec ignition system?
That might affect the suggestions
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Jonny Quest
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Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2978 |
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Posted: May-25-2022 at 4:04pm |
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If you have the ProTech system all of the spark plug wires will run to four coil packs at the rear of the engine. If it is not a ProTech engine then you’ll have a standard distributor.
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2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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TimN
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Joined: May-09-2022 Location: Alabama Status: Offline Points: 14 |
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Posted: May-25-2022 at 6:36pm |
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I have a distributor. Not a ProTec engine
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KENO
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Joined: June-06-2004 Location: United States Status: Offline Points: 11112 |
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Posted: May-26-2022 at 7:46am |
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Since it has a distributor, I'd might be thinking about replacing the cap,rotor,(and points and condenser if it still has points) Or is there an electronic module in the distributor instead of points?
What brand of distributor is it? There should be a tag on the housing identifying it. How's it run at speeds higher than 3000 rpm? Does it just keep getting worse or does it smooth out or does it just not go over 3000 rpm? Do you have an inline fuel filter just before the fuel pump? Just some questions for you to answer to try to help you try to figure out if it's ignition or fuel related
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CanvasVapor
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Joined: March-28-2022 Location: Knoxville, TN Status: Offline Points: 15 |
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Posted: May-26-2022 at 9:15am |
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Could a partially blocked fuel vent or check valve at the tank cause that?
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TimN
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Posted: July-05-2022 at 1:38pm |
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As a follow up the distributor cap and rotor needed to be replaced. Problem solved. I appreciate the help from all.
Tim
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