Hughes179
Cadet
- Joined
- Aug 2, 2018
- Messages
- 12
So I have only found one thread on here that matches the issues I’m having but it was from 2014 and no resolution was posted. 2006 Four Winn’s H260 with a 5.7 GXi. I recently replaced my low pressure pump after tracking down the flaking paint issue within the Volvo Penta pump housing. Checked high and low pressure pumps on the hose and both were in recommended range. Dropped her in the lake the next day and began my slow speed increase accross the water just to see if I encountered any hesitation or misfire issues. Keep in mind prior to determining I had paint flakes in my pump housing and regulator I started with other items such as replacing ignition coil, distributor cap, rotor, and plugs. Also pulled my TB off and cleaned it up. Back to the throttle up. Boat ran smooth up through 3k RMPs. Once I got over 3k, engin shut off.
Popped hatch and determined I wasn’t hearing my fuel pumps turn on. Started checking all the fuses, relays, power lines and harness. Nothing. Everything looked good and intact. All my grounds seems secure as well. Boat turned over but no fire. Checked coil wire And saw I was indeed getting a spark. Once I determined I was up a creek without a paddle I started swimming. Took me about 1.5 hours to drag this 26’ Hull to the shore where I planned to drop anchor and walk to my truck. Figured I would try one more time and just like that I had power back to pumps and engine started. Went straight to dock and back home but never throttled over 1500 when heading back to dock. Spent some time on hose at the house and never had an issue. Went back out today in an attempt to recreate the issue. As expected I crossed the 3k rpm threshold and same result... dead with no power to fuel pumps. Tooled around under hatch for about 30 minutes checking ECM connections and battery wires. Pulled coil wire off and the minute I went turn key on I hear the pumps prime! Starts up. Ran it again up to 3k to 3.5k rpms and it dies. I repeat this about 3 more times with same results.
Next time I get it started I decided to throttle
up in neutral and see if I get same result. Nothing at 3k. Ran it up to 4K and kept running. I then throttled
up and down from idle to 4K a few times to see if I recreated the fault. It eventually died again with no apparent power to pump. This time I never got power back
to pump. After about an hour I was able to get it started but noticed the pump never primed. I limped it back to dock on what I figure was residual fuel in the lines and loaded up. Back at home I have yet to get power back to pumps. I figured the common denominator was the new pump
i replaced. So I swapped it back with old low pressure pump. Still now power.
I have have checked all fuses, what I think are all the ground wires including alternator connections. It has got to be something within the ECM that’s detecting a problem and shutting off my fuel power but I’m out of ideas. Anyone come
across the same issues and found a solution that didn’t involve purchasing a new ECM?
Popped hatch and determined I wasn’t hearing my fuel pumps turn on. Started checking all the fuses, relays, power lines and harness. Nothing. Everything looked good and intact. All my grounds seems secure as well. Boat turned over but no fire. Checked coil wire And saw I was indeed getting a spark. Once I determined I was up a creek without a paddle I started swimming. Took me about 1.5 hours to drag this 26’ Hull to the shore where I planned to drop anchor and walk to my truck. Figured I would try one more time and just like that I had power back to pumps and engine started. Went straight to dock and back home but never throttled over 1500 when heading back to dock. Spent some time on hose at the house and never had an issue. Went back out today in an attempt to recreate the issue. As expected I crossed the 3k rpm threshold and same result... dead with no power to fuel pumps. Tooled around under hatch for about 30 minutes checking ECM connections and battery wires. Pulled coil wire off and the minute I went turn key on I hear the pumps prime! Starts up. Ran it again up to 3k to 3.5k rpms and it dies. I repeat this about 3 more times with same results.
Next time I get it started I decided to throttle
up in neutral and see if I get same result. Nothing at 3k. Ran it up to 4K and kept running. I then throttled
up and down from idle to 4K a few times to see if I recreated the fault. It eventually died again with no apparent power to pump. This time I never got power back
to pump. After about an hour I was able to get it started but noticed the pump never primed. I limped it back to dock on what I figure was residual fuel in the lines and loaded up. Back at home I have yet to get power back to pumps. I figured the common denominator was the new pump
i replaced. So I swapped it back with old low pressure pump. Still now power.
I have have checked all fuses, what I think are all the ground wires including alternator connections. It has got to be something within the ECM that’s detecting a problem and shutting off my fuel power but I’m out of ideas. Anyone come
across the same issues and found a solution that didn’t involve purchasing a new ECM?