limp mode

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   I have a 1995 ski nautique with gt40. last season it ran fine two times out. 3rd time out went into limp mode. I removed wire from oil pressure switch, no luck. I then removed the brown wire from the water temp switch this worked. I replaced the water temp switch, did not solve problem. still have to remove brown wire from temp switch. Does anyone know what the green wire on the water temp switch is for? is it a ground wire? The engine seems to run just fine with the water temp switch wire off.  One thing I did between the 2nd & 3rd time out was remove the dash pod to wax around it. 

John R

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Reginavac Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: July-18-2011 Status: Offline Points: 5	Post Options Post Reply Quote Reginavac Report Post Thanks(0) Quote Reply Topic: limp mode Posted: June-17-2012 at 2:36pm
	I have a 1995 ski nautique with gt40. last season it ran fine two times out. 3rd time out went into limp mode. I removed wire from oil pressure switch, no luck. I then removed the brown wire from the water temp switch this worked. I replaced the water temp switch, did not solve problem. still have to remove brown wire from temp switch. Does anyone know what the green wire on the water temp switch is for? is it a ground wire? The engine seems to run just fine with the water temp switch wire off. One thing I did between the 2nd & 3rd time out was remove the dash pod to wax around it. John R
	Reginavac

lewy2001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234	Post Options Post Reply Quote lewy2001 Report Post Thanks(0) Quote Reply Posted: June-17-2012 at 10:55pm
	John there are 3 water temp sensors on the GT40 engine. 1. The ECT sensor near the front on inlet manifold it is a two wire device as it has a signal return to the EEC. This is the main one for controlling fuel and ignition via computer. 2. Engine temperature gauge sender. 3. Engine temp switch that puts the EEC computer into limp(SLOW) mode. The SLOW or limp circuit is just a parallel cct from the third engine temp switch and a oil pressure switch. When either of these switches are activated they switch to ground or earth. By removing the wire from the faulty switch it stops this ground signal from being sent to pin 24 at ECA connector (computer). Not sure what colour wire is at that temp switch but the wire to the ECA connector is shown as tan/black.
	If you're going through hell, keep going 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta

limp mode

About CCF

Donate

Partners

Contact