370Dancer
Well-Known Member
- Oct 2, 2006
- 2,489
- Boat Info
- 1998 370 Sundancer
- Engines
- 380hp MAG MPI Gen VI with V drives
Here's the latest in the saga of this Port Engine.
Videos in order, taken this morning.
https://share.icloud.com/photos/0jjO17nWxQuC4Q0YsGuR19uUA
https://share.icloud.com/photos/0WHMMm3mpsUo9JujX1BTwD7-A
https://share.icloud.com/photos/0YBi_DKBRh_Hjrao86FlhBf7w
https://share.icloud.com/photos/0tqRdct8gOpfwHKPlwkQ9BNag
https://share.icloud.com/photos/0Hwnr0uC61FWD15flTxAj_M6w port engine data after shutdown
https://share.icloud.com/photos/099GCF5IrraGrOMQK5H5kF5pg stbd engine data (no warmup)
Fuel circuit from the fuel tank:
existing 5/8" fuel line from tank pickup to Parker Skinner fuel shutoff (2011 replaced)
Tried shutoff in bypass and normal - no change
NEW 3/8" fuel line, heat shield wrapped from shut off solenoid to inline filter
NEW inline filter to low pressure fuel pump (August 2020)
NEW low pressure fuel pump (August 2020) to fuel/water sep filter
NEW (day before yesterday) fuel/water sep filter 1807844
NEW replacement fuel line from fuel / water sep to High pressure pump (June 2020)
Replacement high pressure fuel pump (June 2020) to fuel rail
Original fuel line from pump to fuel rail, new o-rings June 2020
NEW injectors (June 2020)
NEW replacement return fuel line from NEW (June 2020) OEM fuel pressure regulator (June 2020) to fuel / water sep
NEW IAC (June 2020)
NEW IAT sensor (August 2020)
Tried with cap off of fuel fill to eliminate vent - no change
100% monitoring of fuel pressure: no loss
The only difference I see is a bit more voltage on the TPS compared to the Starboard engine, which runs like a top, and goes to full rpms under load. ,43 v when I believe spec is .35 v at idle. But I see that on the STBD engine too.
Other:
NEW Ignition module (a few days ago) - suspect. will put the old one back on to see if there's a change
NEW plugs ( a few days ago) NGK BR6FS
NEW distributor module: (Sept 2020)
NEW wires, cap and rotor (April 2020)
Swap techniques:
swapped 2 relays from STBD engine: no change
swapped out ECM: no change
I am down to guessing the replacement high pressure fuel pump is failing after getting to some temperature, below 160.
Boat has sat since June due to other things. Put in a fresh set of plugs and the ignition coil to see if it would run up to plane. Right around 3000 RPM (struggling as usual), the engine just died. wouldn't start again until the next morning, and only for a few minutes, like you see on the video now, This is repeatable every day this week.
I didn't go to makeup before making the video.
Videos in order, taken this morning.
https://share.icloud.com/photos/0jjO17nWxQuC4Q0YsGuR19uUA
https://share.icloud.com/photos/0WHMMm3mpsUo9JujX1BTwD7-A
https://share.icloud.com/photos/0YBi_DKBRh_Hjrao86FlhBf7w
https://share.icloud.com/photos/0tqRdct8gOpfwHKPlwkQ9BNag
https://share.icloud.com/photos/0Hwnr0uC61FWD15flTxAj_M6w port engine data after shutdown
https://share.icloud.com/photos/099GCF5IrraGrOMQK5H5kF5pg stbd engine data (no warmup)
Fuel circuit from the fuel tank:
existing 5/8" fuel line from tank pickup to Parker Skinner fuel shutoff (2011 replaced)
Tried shutoff in bypass and normal - no change
NEW 3/8" fuel line, heat shield wrapped from shut off solenoid to inline filter
NEW inline filter to low pressure fuel pump (August 2020)
NEW low pressure fuel pump (August 2020) to fuel/water sep filter
NEW (day before yesterday) fuel/water sep filter 1807844
NEW replacement fuel line from fuel / water sep to High pressure pump (June 2020)
Replacement high pressure fuel pump (June 2020) to fuel rail
Original fuel line from pump to fuel rail, new o-rings June 2020
NEW injectors (June 2020)
NEW replacement return fuel line from NEW (June 2020) OEM fuel pressure regulator (June 2020) to fuel / water sep
NEW IAC (June 2020)
NEW IAT sensor (August 2020)
Tried with cap off of fuel fill to eliminate vent - no change
100% monitoring of fuel pressure: no loss
The only difference I see is a bit more voltage on the TPS compared to the Starboard engine, which runs like a top, and goes to full rpms under load. ,43 v when I believe spec is .35 v at idle. But I see that on the STBD engine too.
Other:
NEW Ignition module (a few days ago) - suspect. will put the old one back on to see if there's a change
NEW plugs ( a few days ago) NGK BR6FS
NEW distributor module: (Sept 2020)
NEW wires, cap and rotor (April 2020)
Swap techniques:
swapped 2 relays from STBD engine: no change
swapped out ECM: no change
I am down to guessing the replacement high pressure fuel pump is failing after getting to some temperature, below 160.
Boat has sat since June due to other things. Put in a fresh set of plugs and the ignition coil to see if it would run up to plane. Right around 3000 RPM (struggling as usual), the engine just died. wouldn't start again until the next morning, and only for a few minutes, like you see on the video now, This is repeatable every day this week.
I didn't go to makeup before making the video.