whitesnstripes
Recruit
- Joined
- May 16, 2010
- Messages
- 4
2005 Mercruiser 5.0 MPI Serial OW341073 PCM 555 Bravo with Cool Fuel III and "hobbs" switch installed between tank and pump.
I purchased a Rinda scanner and ran the initial test without cranking the engine, thus being cold. I believe this is a false code 119 steering ckt lo, because there is no steering control system installed.
Freeze Frame:
RPM 570
Battery Voltage: 14.3
Fuel Level 28%
Oil Pressure: 52.5 psi
ECT: 160 F
Seapump Pressure: 30 psi
with keyon, fuel pressure gauge on rail registers 40 psi. Once cranked and idling it jumps around 90 psi. The engine ran for five min and died due to fuel pressure dropping to 0 and stalled.
Approximiately 20 min later after the engine had stalled I pulled the same false steering code, but none other but the freeze frame concluded:
Map and Bar pressure were both 14.7
MAT 82 F, which was about ambient temp
but the ODD thing was Lake/Sea Temp said 429 F????
I could place my hands on the tops of the manifolds and they were cool to touch. Lower in the bilge the bottom side of the manifolds were very hot? The water circulation thru the cool fuel system must've been very hot also the fuel lines were too hot to touch?
I tried to run a vacuum test on the pump relays, but found strange readings. Key on, 40 lbs of fuel rail pressure and then cranked the engine for it to rise to 90 psi. I removed the vacuum line at the fuel pressure regulator at the rail and added my trusty vacuum gauge and was supposed to pump it to 10, but it was already at 17 psi??. I released the pressure and it reduced to around 14 psi, no further.
Obviously I have too much fuel pressure at the rail, but from where is this extra pressure coming from?? help?
I purchased a Rinda scanner and ran the initial test without cranking the engine, thus being cold. I believe this is a false code 119 steering ckt lo, because there is no steering control system installed.
Freeze Frame:
RPM 570
Battery Voltage: 14.3
Fuel Level 28%
Oil Pressure: 52.5 psi
ECT: 160 F
Seapump Pressure: 30 psi
with keyon, fuel pressure gauge on rail registers 40 psi. Once cranked and idling it jumps around 90 psi. The engine ran for five min and died due to fuel pressure dropping to 0 and stalled.
Approximiately 20 min later after the engine had stalled I pulled the same false steering code, but none other but the freeze frame concluded:
Map and Bar pressure were both 14.7
MAT 82 F, which was about ambient temp
but the ODD thing was Lake/Sea Temp said 429 F????
I could place my hands on the tops of the manifolds and they were cool to touch. Lower in the bilge the bottom side of the manifolds were very hot? The water circulation thru the cool fuel system must've been very hot also the fuel lines were too hot to touch?
I tried to run a vacuum test on the pump relays, but found strange readings. Key on, 40 lbs of fuel rail pressure and then cranked the engine for it to rise to 90 psi. I removed the vacuum line at the fuel pressure regulator at the rail and added my trusty vacuum gauge and was supposed to pump it to 10, but it was already at 17 psi??. I released the pressure and it reduced to around 14 psi, no further.
Obviously I have too much fuel pressure at the rail, but from where is this extra pressure coming from?? help?
