95 SuperSport Engine Question |
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backfoot100
Platinum Member Joined: January-03-2007 Location: United States Status: Offline Points: 1897 |
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Posted: September-10-2014 at 10:54am |
ProTec wasn't introduced until '91. You don't have it unless it was some sort of a one-off special test edition that nobody knows about. |
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When people run down to the lake to see what's making that noise, you've succeeded.
Eddie |
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kylem428
Senior Member Joined: May-31-2005 Location: United States Status: Offline Points: 263 |
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Protec systems generate spark from coil packs located above the bell housing at the rear of the engine. Easiest way to tell if you have a protec is to see where your spark plug wires come from. If they come from the back, it's a protec. If they come from a distributor in front of your carb it's not. If it is a protec, take a look at the coil packs for a brownish sticky goo (epoxy like) substance leaking from them. If you find this, the system is likely shot and it would be easiest to do the Mallory electronic distributor conversion from ski-dim to get back on the water quickly and easily. Other guys gave done other DUI distributor conversions but that requires tapping in to the wire harness, where as the kit is basically plug and play. Your looking at about $500 for the kit if I recall correctly.
Kyle |
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Jimn
Newbie Joined: July-23-2014 Location: San Diego Status: Offline Points: 8 |
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Hope the new fuel filter works! Could someone tell me how I can determine if my 1990 Sport Nautique with a 351 hp Ford PCM engine has a Protec ignition system installed? What would I look for?
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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I think we solved my problem last night or at least hope so. We replaced the fuel filter even though it was only a year old and every thing seemed to run better. I dumped the fuel from the filter into a bottle and it was all dark and dirty, just a few weeks ago it was clear. I am still not 100% sure it is fixed but we had some good runs last night with no stuttering and will give it a full test this weekend if the weather holds out.
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Jim, if you don't have Protec, it could be a coil overheating issue.
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desertskier
Platinum Member Joined: December-19-2006 Location: Az Status: Offline Points: 1115 |
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If you have the Protec ignition it will go to limp mode if a over temp or low oil pressure condition is detected. Limp mode limits the RPM's. There are two switches on the engine that look like temp and oil sending units. The oil switch is near the oil filter and the temp switch is on the front of the intake manifold. You can disconnect both of them and the Protec will operate normally. Your engine will also have oil and temp sending units that drive your gauges. If you disconnect the wrong ones it won't hurt anything but your gauges won't read correctly. I would disconnect the switches and see if you still have a problem. If it goes away then connect one at a time to see which one is malfunctioning. Good Luck.
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Jimn
Newbie Joined: July-23-2014 Location: San Diego Status: Offline Points: 8 |
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one more thing, this has happened several times, not just once. I have gone through about 3 straight cycles of running well for an hour, then bogging down, then next time out runs perfectly for an hour, etc. In the meantime, I have replaced the water/fuel separator and fuel filter resulting in no change...
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Jimn
Newbie Joined: July-23-2014 Location: San Diego Status: Offline Points: 8 |
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Don't mean to hijack this thread, but I am having a very similar problem with my 1990 carburated Sport Nautique with a Ford 351 PCM engine. After about an hour of running perfectly at high RPMs, the engine bogs down and won't go over about 3,000 RPM. It almost feels like there is seaweed around the prop, but it is indeed clear. I did have the carb rebuilt by a quality shop before this started happening, but both the shop owner and I think it is strange that the engine runs beautifully for so long, and then begins bogging down. do you think the oil and temp sender could be a problem on my engine? Or does that feature referred to above (the engine shutting down intentionally when oil pressure drops or temp increases too hot)only pertain to fuel injected, newer engines? Any response today would be greatly appreciated, as I am out at the Colorado River and debated whether or not to tow the boat back home in San Diego!
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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We posted at almost the same time :-) thanks and that's what I am planning! It has been a bizarre issue and I am ready for it to be over. I have missed alot of time on the water because of this. I have broke more parts trying to fix it than anything.
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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I am going to try unhooking oil pressure sensor and temp sensor tonight to see if maybe its that. What rpms are people turning at 24 mph? Maybe my rpm gauge is off.
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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It may be going into SLOW(limp)mode although it normally keep the rpms below 2700rpms . Disconnect the wire from the temperature switch and oil switch they are independent of the senders that go to the temp and oil gauges.
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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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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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Ok so a new development. The boat will not go over 3500. Rpms. It surges and the rpms drop and come back up. So any ideas?
I am guessing it was not going over 3500 Rpms the whole time and I didn't make that connection. Fuel pumps new Alternator new- made a big difference on voltage, other must have been going bad Starter solenoid new Fuel and ECM relay new Kill switch direct wired Any ideas? What can I test now? I need all the help |
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lewy2001
Grand Poobah Joined: March-19-2008 Location: NSW Australia Status: Offline Points: 2234 |
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Never received confirmation back from PCM on the EEC Power Circuit. Here is Lewy's GT40 EEC Power Retrofit |
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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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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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Ugh nothing but more problems...
changed both pumps and still not fixed, started having more voltage/electrical issues. Tried to tighten up alt belt and the alt case snapped at bolt hole. Replaced it and went on to clean more wires and check for issues when the bolt in the starter solenoid stripped. Replaced it and now I am not getting voltage to gauge. I am going to trace out the electrical wiring and test everything but it seems everything I touch I break. :-( |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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I think that was lewy and his 98 Sport. If I recall it was a PCM tech bulletin he had found.
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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That fuse issue sounds familiar.
It's definitely worth checking out. I found this thread that mentions it: http://www.correctcraftfan.com/forum/forum_posts.asp?TID=24848&PN=3&title=gt40-engine-loping |
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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Another question, one post someone mentioned the fuse after the battery caused them a bunch of issues and once removed it helped. Could that be an issue? My buddy seems to remember seeing it corroded/oxidized. Also did not check the screen in top of the LP so I will do that as well.
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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Ok so I went through the fuel system again. Pick up tube is clean. Screen in HP is clean.
Fuel pressure- 36-38 idle and accelerating. When it does hesitate it drops to 12 or low teens. How do I know what pump is the problem. If it is a pump? I took it all apart and connections look good. |
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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There was a thread that someone posted with very similar problems ended up being a clogged screen or tank pickup tube in the tank.
After checking the pumps and pressure (which is easy way to start) then I would start at the tank pump/pickup and work forward. |
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Dreaming
Platinum Member Joined: May-21-2010 Location: Tacoma, WA Status: Offline Points: 1870 |
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your low pressure pump is in the lower right of this picture, it looks like a canister with a line coming out the top. SKIDIM has them. you should have 40PSI IIRC at the fuel rail (high pressure pump), but the flow comes from the low pressure pump. hesitation sounds like a fuel delivery issue, when mine went, it would not suck fuel out of the tank, so the pressure was low, but registering. I took the line off at the TBI (94-95 only) and had no flow. |
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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I guess the one in the second is the high pressure pump then? Do the non-FCC boats still have a high and a low? I saw "two stage" in the description and got confused. Sorry for any misinformation.
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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I do know that 2nd picture is a pump that according to Zach at N3 Boatworks is getting hard to get. I would advise to call him for parts.
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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The boat was weighted at the time so it was going a little slower. The day before we wakeboarded and was hardly any hesitation. Then last night it was back full hesitation so we dropped the weight and went home.
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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that was about 3/4 throttle. So the little black round dome one is the LP pump? I must be looking at the wrong diagram. Can you link me to that post?
going to start checking fuel and pumps tonight. |
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gun-driver
Grand Poobah Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Was that full throttle in your video?
If so I would stop the ignition checks and start testing the fuel pumps. Your last pic is the low pressure pump. Lewy posted this picture of how to jump the STO to ground which will turn on both pumps to check for proper operation. |
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Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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I think this is what you want:
http://www.nautiqueparts.com/fuelpumpelectric2stagefprpcmgt40engineswithoutfuelcontrolcell1995tomid1996.aspx I'm sure Zach can hook you up, and you should double check anyway before ordering. |
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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Very stupid question for me, in Pic 2 is that one of the pumps?
In the last pic is the small black thing a pump as well? Or a type of filter? Where is the LP pump if neither of those are it. Looking at diagrams and confusing myself. Thanks |
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burban89
Groupie Joined: January-29-2008 Location: SC Status: Offline Points: 55 |
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whats the proper way to test the pumps if pressure is messed up?
thanks for all the replies. |
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