GT-40 Sputtering at ihgh RPM |
Post Reply |
Author | |
hummerh21961
Newbie Joined: July-09-2015 Location: Murrysville, PA Status: Offline Points: 3 |
Post Options
Thanks(0)
Posted: July-09-2015 at 12:08pm |
I have 2001 Ski Nautique GT-40 that is encountering output problems at higher RPM. Engine starts, idles smooth, runs good up to ~2,500 RPM. If I "jump" on it and additional throttle is added, it bogs and sputters worse. If I back off, it runs smooth. |
|
camron18
Senior Member Joined: March-05-2015 Location: Michigan Status: Offline Points: 164 |
Post Options
Thanks(0)
|
what year is it?
if it runs good until you get to 2500 rpm, then its your protec ignition system going into limp mode. the ignition system goes into limp mode when it senses High water temp, or low oil pressure. if your temp gauge and your oil pressure gauge both look good. (120-160) on temp (40 psi or so) on oil pressure, then you can test the protec switches. to do this first find the oil pressure switch above the oil filter and next to the oil pressure sending unit. unplug the single wire connected to it. see if that fixes the problem. if that does it order a new one. if not do the same with the water temp switch on top of the manifold. if you unplug both and it still does it, then it is time to convert it to a distributor. i had the same thing ever since i got my boat off and on, i undid the temp switch and it runs full throttle fine now |
|
GottaSki
Grand Poobah Joined: April-21-2005 Location: NE CT Status: Offline Points: 3359 |
Post Options
Thanks(0)
|
Its not a tumor, er, protec
|
|
"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
|
Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
Post Options
Thanks(0)
|
Is this 2,500 rpm line, a fairly hard line? In other words, will it sputter every time you get to that RPM? Is your check engine light lighting when the sputter happens or otherwise?
|
|
M3Fan
Grand Poobah Joined: October-22-2005 Location: United States Status: Offline Points: 3185 |
Post Options
Thanks(0)
|
Bri892001 is asking the right questions and cameron18 is right other than the Protec/distributor part.
The GT40 limp home mode is I think about 2800 RPM and it very abruptly and violently kicks in- there is no mistaking it. |
|
2000 SN GT40 w/99 Graphics/Gel
2016 SN 200 OB 5.3L DI https://forum.fifteenoff.com |
|
hummerh21961
Newbie Joined: July-09-2015 Location: Murrysville, PA Status: Offline Points: 3 |
Post Options
Thanks(0)
|
thanks in advance to all for the quick response as I will hopefully try to clarify a couple of supportive points:
year: 2001 - SN 19.6 Relative to "hard deck", YES...it appears that is the consistent point of which the "bogging" and sputtering kicks in. The one point that I left out earlier that might be of importance is that the Check Engine lights is always ON |
|
Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
Post Options
Thanks(0)
|
Ahhh, huh!! I'd say there's a high chance of this being a limp mode situation. Try disconnecting your oil pressure SWITCH (vs sendor or sensor) then disconnecting your water temp SWITCH ( again not sendor or sensor) and see if this corrects the situation. If so, you need to replace either the oil pressure switch or your water temp switch. |
|
camron18
Senior Member Joined: March-05-2015 Location: Michigan Status: Offline Points: 164 |
Post Options
Thanks(0)
|
Yeah had the same thing. hopefully one or the other will fix the limp mode!
Cheep fix if its one of those! |
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |