2001 Sport Nautique no fuel pumps running?
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=36598
Printed Date: October-07-2024 at 6:25pm
Topic: 2001 Sport Nautique no fuel pumps running?
Posted By: 76 Ski Tique
Subject: 2001 Sport Nautique no fuel pumps running?
Date Posted: June-29-2015 at 11:29pm
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hey there guys not new at all to the site so i am confident you can help me with me electrical hiccup? got a newer 2001 sport with the PCM APEX 5.7 have about 20 hours on her with no problems. did a youth event last week ran 10 hour over the course of two days never a worry. Friday go to the river she lights right up and runs as usual withe the exception of the slightest miss on one accel..nothing to write home about. cruised around at low speeds for about 6 min. shut off to swim with the family.. upon startup again it starts runs for 2 seconds dies. i repeat this 5 times. check battery cable, cycle through the keypad... no difference..after about 8 tries she does nothing but crank over. i do notice that i am getting no whine at all from either fuel pump...i swap my ignition and fuel pump relay exact same thing... pull of the lake and head home. today upon further exam i pulled both fuel pumps including the low pressure and the fcc pump and they both run no problem on 12V.. upon further investigation i seem to have no power coming to either pump onboard. all other functions of the boat are alive and well. next step would be check the fuel check valve but i assumed the low pressure would still run even if it wasn't pulling fuel...any body have this issue or similar. could be something stupid. i am a bit new to the FI boat setup. ------------- B.O.A.T- bust out another thousand |
Replies:
Posted By: lewy2001
Date Posted: June-30-2015 at 10:43am
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Have not seen a wiring diagram for the GM Apex FI setup. But it would use a relay to operate fuel pumps. Check voltage at relay and activation circuit. Take some pictures and post them up of rear of engine if you are not sure where the relay is located. ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
Posted By: 76 Ski Tique
Date Posted: July-02-2015 at 10:37am
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Checked yesterday I do have spark. And will post a pic today of the relays. How do I tell which relay is to fuel and which is ign. ------------- B.O.A.T- bust out another thousand |
Posted By: 76 Ski Tique
Date Posted: July-02-2015 at 11:44am
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Ok may need a refresher on how to post a pic...sorry guys ------------- B.O.A.T- bust out another thousand |
Posted By: Bri892001
Date Posted: July-02-2015 at 11:59am
| How about your safety lanyard, did you check it? |
Posted By: 76 Ski Tique
Date Posted: July-02-2015 at 6:05pm
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I did have an issue with the lanyard same day so I pulled the plugs out of the back of the switch and jumped with wire until new one arrives. I assume that switch has to be a ccomplete circuit to run? ------------- B.O.A.T- bust out another thousand |
Posted By: Bri892001
Date Posted: July-02-2015 at 6:16pm
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Yes, the switch needs to be in order for the fuel pumps to run. I'm not actually not sure if the lanyard being in place (and allowing the fuel pumps to run) opens or closes that circuit. |
Posted By: Bri892001
Date Posted: July-02-2015 at 6:20pm
| I'm also using the Ford GT-40 engine as a reference point, but I assume it's the same deal with the Apex motor. |
Posted By: 76 Ski Tique
Date Posted: July-02-2015 at 10:25pm
 Here's a shot of the rear of the engine. i have 12.3 volts at the relay on the left- it seems to calibrate the throttle body when i plug the relay in. the right relay i have 0 volts and cannot seem to find power at any of the wires on it. installed the new shut of switch today and it definitely makes a slight "adjustment" at the stern end of the motor when the lanyard is installed. almost like a priming sound. kinda stumped short of pulling harness apart... no fuses are tripped in the under dash panel. am i missing something easy? ------------- B.O.A.T- bust out another thousand |
Posted By: lewy2001
Date Posted: July-02-2015 at 10:33pm
The relay with the large red and purple wires would be the ignition relay. They look to be the standard GM relays skidim has them. http://www.skidim.com/RELAY-12V-GM-FUEL-PUMP_SYSTEM/productinfo/R130012/" rel="nofollow - GM relays ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
76 Ski Tique wrote:Posted By: lewy2001
Date Posted: July-02-2015 at 10:36pm
Just join the wires together temporarily to help diagnose problem. (The lanyard just open the cct when pulled or faulty) ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
Posted By: 76 Ski Tique
Date Posted: July-07-2015 at 1:18am
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hey guys just to keep you updated. i was getting different inconclusive voltage readings from the relay so i ended up undoing the harness enough to see which wires were which to confirm continuity. ( some wires change color once inside the harness...- super fun). i ended up tracing it back to a strange looking plug that (dummy) ended up to be a small fuse block with a 15a/10a/15a in a row. never new about this in any of my searching or owners manual troubleshooting. two were blown. i replaced the blown fuses and cycled the key. immediately the fuel pumps ran for 1 second and the 15a for the fuel pumps blew..after further investigating the low pressure fuel pump was drawing to much power due to old age or dirt particles or whatever. have a new one on the way from skidim. also checked anti-syphon to see if that was causing a harder pull but fuel flows smoothly. the high pressure pump seems to be running fine without blowing the fuse. should be water ready by the weekend, thanks guys for the input! ------------- B.O.A.T- bust out another thousand |
Posted By: jhersey29
Date Posted: July-07-2015 at 3:43am
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http://1drv.ms/1UuyMhj%20" rel="nofollow - http://1drv.ms/1UuyMhj" rel="nofollow - http://1drv.ms/1UuyMhj This manual is handy for wiring diagram for that era pcm engine. |
Posted By: lewy2001
Date Posted: July-07-2015 at 8:22am
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Jim that link is for the Ford GT40 engine it is in the reference section of this site. Caleb has the much rarer GM Apex FI engine. Have not seen a wiring diagram for it maybe contact PCM and see if they can help. ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |
Posted By: jhersey29
Date Posted: July-07-2015 at 10:47am
It is for ford and gm engines. The gm carb and efi diagram is I the link. That manual I linked is not in the reference section. Ignore the name of the file and read the cover page. "For all Chevrolet and Ford Based Engines" |
Posted By: lewy2001
Date Posted: July-07-2015 at 9:36pm
You are right Jim when I only had a "man look" at that cover page  ------------- If you're going through hell, keep going http://www.correctcraftfan.com/diaries/details.asp?ID=2999" rel="nofollow - 89 Ski <a href="http://www.correctcraftfan.com/diaries/details.asp?ID=5685" ta |