Long Running Stalling then No Start Issue - GT40 |
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StevoDevo
Newbie Joined: July-20-2014 Location: Bend, OR Status: Offline Points: 30 |
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So here is the EEC connector I have - which of the connectors does the cable I'm going to make go into?
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Picture????? |
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Your looking at the wrong side look at the female side as in the earlier picture then with the long side down and the small side up the right corner should be the female side of the double green & orange wire.
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Any updates on a fix??
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StevoDevo
Newbie Joined: July-20-2014 Location: Bend, OR Status: Offline Points: 30 |
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Hey Gun-Driver
No progress has been made unfortunately! We have had a week of rain here in Oregon! Couple of questions: 1) What does STO stand for? 2) I'm ready to make the cable but wanted to know what amperage fuse you use? Then I guess the plan of attack is as follows: 1) Get back out on the lake & play hard all morning long 2) Have a nice relaxing lunch (but open the engine cover) 3) Try an afternoon run If the engine fails, I just want to confirm I'm going to do the right tests: 1) Connect cable to STO 2) Key ignition on and test for fuel pressure 3) Do I try to start with the cable connected to the STO? I probably need to check for spark too - what's the easiest way to do that? Should I buy a timing light? Thanks! Steve |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Yes! |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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In line spark testers can be useful too, because you can leave it in place:
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Heat soak problems hey Paul and Steve. Been there before myself they can be confusing.
Test for spark when the heat soak problem is there if spark is OK. Zone in on the fuel system pumps running, plenty of fuel pressure while cranking without start? The fuel pump relay is activated by the ECM completing the circuit by supplying the ground (pin 52 on ECM connector). You can leave the STO jumpered to ground and the fuel pumps should run all the time. If intermittent you can leave this jumper in place and rule out problems with the ground supplied by ECM when it is in the heat soak condition. There is one other possibility now in that if it has spark and fuel pressure but still will not start. It may not be getting the spark at the correct time or the injectors not firing properly. This could then be a ECM (Computer) heat soak problem. |
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If you're going through hell, keep going
89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
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StevoDevo
Newbie Joined: July-20-2014 Location: Bend, OR Status: Offline Points: 30 |
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Okay I got the cable all built and ready to go out today! When I had the ignition turned on and cable connected, I could hear a pump running - so that's a good sign right?! :)
I'm still not sure how to check for spark - I did buy a timing light, but really don't know how to use that to test for a spark condition. I also have my fuel pressure tester ready to go again today! Will let you know how things go today! Steve |
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malibud
Gold Member Joined: July-08-2009 Location: north carolina Status: Offline Points: 613 |
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You can test spark by getting tester like Brian said or in a pinch crank the engine and hold one plug anywhere to the metal one the engine . Crank and look for spark.
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PT Skier
Groupie Joined: June-03-2011 Location: Portugal Status: Offline Points: 66 |
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4 years ago I had a problem with my engine that matches exactly what you described.
After running with the boat for some time (enough to raise the engine temperature to normal levels), if I turned it off I couldn't start it once again. Then I found out that if I waited long enough in order the temperature to fall I was able to start the engine once again. After some discussions we found out that if we were able to cool down the fuel pumps the engine would restart normally (we used a sponge with cold water from the river to test this). At the end, and after replacing both high and low pressure fuel pumps I never experienced that problem again. Not a very technical input but just to report my experience. Hope it helps. |
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Ski Nautique 196 OB (1995)
PCM Pro-Boss GT-40 Multiport EFI 5.8L 310hp 750 hours |
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parrott
Senior Member Joined: July-22-2009 Location: Alabama Status: Offline Points: 185 |
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I have been fighting the same problem about stalling for a year. It finally stopped completely. I put in a new low pressure pump and it started in the driveway! Can't wait to get to the lake this weekend. I believe the problem has been solved.
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1999 Air Nautique
1992 Nautique 1978 Nautique |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Gary, hope you found the fix! Let us know how the lake test goes.
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parrott
Senior Member Joined: July-22-2009 Location: Alabama Status: Offline Points: 185 |
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Boat ran great this weekend. No stalling issues for the first time in a year. Appears the low pressure pump was going bad for a long time and finally died. Life seems much better when you can trust your boat!
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1999 Air Nautique
1992 Nautique 1978 Nautique |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Awesome
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Thanks' Jose (PT Skier) for your post as well. I've added both yours and Gary's to the GT40 thread.
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mtguy
Senior Member Joined: August-04-2008 Location: Priest Lake, ID Status: Offline Points: 165 |
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I had similar problems last year, and found leaving the motor cover opened after a round of skiing prevents the problem. especially on really hot days... now I think I will change the low pressure pump (after I figure out where it is:~) after the season is over...early October here in North Idaho.
Great discussion. Thanks ~Pete |
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'95 SN
'53 Hutchuck '56 Essaness Craft |
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parrott
Senior Member Joined: July-22-2009 Location: Alabama Status: Offline Points: 185 |
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I would run the blower frequently and leave the motorbox cover up to let it cool. When it did stall, I would pour lake water on the pump and it would decrease the time of the stall. Wish I would have changed the pump sooner. I believed it was vapor lock but it wasn't.
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1999 Air Nautique
1992 Nautique 1978 Nautique |
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mtguy
Senior Member Joined: August-04-2008 Location: Priest Lake, ID Status: Offline Points: 165 |
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Mine has never stalled, but it has refused to start after sitting while waiting for next 'set'. I too have used the wet rag technique. A low pressure pump for me! Are they difficult to install?
~Pete |
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'95 SN
'53 Hutchuck '56 Essaness Craft |
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parrott
Senior Member Joined: July-22-2009 Location: Alabama Status: Offline Points: 185 |
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Actually, mine did not stall. It would run great until I stopped for an extended time. Then it would start and run about 100 yards and die. The pump is easy to install. Three screws on the top and reconnect the fuel lines. I used teflon tape on the fittings. If I can install it, anyone can! |
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1999 Air Nautique
1992 Nautique 1978 Nautique |
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mtguy
Senior Member Joined: August-04-2008 Location: Priest Lake, ID Status: Offline Points: 165 |
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Thanks for the confidence builder...I need it! " If I can install it, anyone can!" -hopefully I won't prove you wrong!!
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'95 SN
'53 Hutchuck '56 Essaness Craft |
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parrott
Senior Member Joined: July-22-2009 Location: Alabama Status: Offline Points: 185 |
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Let me know how it works out
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1999 Air Nautique
1992 Nautique 1978 Nautique |
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StevoDevo
Newbie Joined: July-20-2014 Location: Bend, OR Status: Offline Points: 30 |
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Thanks guys - so where is this low pressure pump located and just what does it look like? Pictures help! :)
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parrott
Senior Member Joined: July-22-2009 Location: Alabama Status: Offline Points: 185 |
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I don't have access to post pics at this time, however, I am sure someone will later. Looking at the front of the engine it is a small bowl that is suspended below the alternator belt pulley...that is the lower right hand side. It is a round cylinger about 6 inches long and attaches from the top with 3 small nuts. There is a electrical cable coming from it and the fuel line that goes up into the FCC. Hope this helps.
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1999 Air Nautique
1992 Nautique 1978 Nautique |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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From another thread, he was asking "is this the pump?", the answer was that, that was in fact it:
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StevoDevo
Newbie Joined: July-20-2014 Location: Bend, OR Status: Offline Points: 30 |
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Very cool - thanks for the picture - definitely helps! So now I just need to work out the part number! Shouldn't be too hard I guess! Might make it part of my winter maintenance.
Thanks guys! |
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StevoDevo
Newbie Joined: July-20-2014 Location: Bend, OR Status: Offline Points: 30 |
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Think I found it - http://www.skidim.com/prodinfo.asp?number=RA080018
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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Just replaced mine after learning how to deal with it by holding the starter a little longer than just getting it going. 500 hours but 19 years....on the 1996'Super Sport. The position for repairing it is to climb in adjacent to the engine. Leaning over the back seat was not fun. Advice....take a few pics before starting so you can easily recall.whatmwent where.
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2008 MasterCraft 197TT
1996 Nautique Super Sport 1988 Waterlogged Supra Mariah |
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