300 HPDI fuel problem i think

[skeeter21i]

have a 2008 300 hpdi it had set for a few months i started up just fine parked the truck got in it and made a 2 mile run no problems until i came off plane it died the only way i can get it to start is to trim it all the way up and turn it over and over it will finally start i have to keep it revved up or it will die but got it back on plain made the 2 mile run back run fine on plain but same thing just dies when i shut down when on the trailer it fired up and ran fine on the hose for about three or four min then would drop from 7 to 8 hundred rpm to around 400 and die then have to do the trim it all the way up thing i drained the tanks and put new plugs in it could it be the low pressure fuel pumps maybe

[skeeter21i]

update i read that you should change the lp pumps every three to four years mine are factory so i pulled them off and did the leak test with the primer bulb and had no leaks but i will still replace them but i noticed the wire broke off and laying in the bottom of the cowing not sure if it would cause my problem or not here is a pic its the wire that goes this filter s-l1600.jpg

[SKfishing]

Can you pump the bulb and keep it running? That is effectively what the LP pumps are doing to keep the vst tank full.

[24VDR]

VST filter.....clean or replace...

24VDR

[skeeter21i]

i already took them off to put the new ones on when they get here but i dont think they were bad but they are 11 years old so it wont hurt to change them im hoping its the filter in my pic will find out wed

[skeeter21i]

VST filter.....clean or replace...

24VDR

it looked brand new not a speck of trash on it

[jp10]

light oil on the O-ring for the filter in the picture. Sometimes it doesn't seal and will draw air

[skeeter21i]

light oil on the O-ring for the filter in the picture. Sometimes it doesn't seal and will draw air

the wire that goes in the bottom was broke off so i ordered a new unit

[skeeter2222]

Every now and then mine will not start unless i tilt it up like yours, ive been told it could be the tuner , mine also runs good on a hose. Maybe yammy 911 will chime in.

[skeeter21i]

I'm pretty sure I found the problem on the filter in my picture the wire that goes up inside from the bottom fell out I didn't think anything about it because it has been unplugged for years because it would always trip the alarm for water in the fuel today I was thinking maybe it is sucking air so I stuck my air hose in it and held the other side closed and sure enough it shot air out from the place the wire was so I will know for sure Saturday but I'm pretty sure that is my problem

[skeeter21i]

ok Filter in my picture did not fix it it ran fine on hose but went to the lake and no go

[skeeter21i]

Deleted

[skeeter21i]

just ordered the Yamaha YDS and cables it was only 70 bucks on Amazon so hopefully i will be able to read my tps voltages

[skeeter21i]

My tps voltage looks good but plugs are black and wet and is still flooding I pulled all injectors and are ultrasonic cleaning them but I find it hard to believe all six have trash is there anything anyone thinks I should look at before I put the cleaned injectors back in next week

[jp10]

Change the mystery filters? What brand oil are you using?

[jp10]

size and condition of your battery(s)?

[skeeter21i]

Change the mystery filters? What brand oil are you using?

I pulled them out so I can when the new ones get here but they looked brand new not a speck of anything in them

[skeeter21i]

size and condition of your battery(s)?

it's a 27 has 12.5 v but I am going to change it just to be sure

[skeeter21i]

ok yds is giving me a bad fuel pressure sensor so maybe that is why its flooding i also pulled all the plugs out and turned it over a it sprays fuel out of the bottom right cyl and middle cyl on the left side is this normal and is there only one fuel pressure sensor and is it under the vst 67h 82380 00 00

[skeeter21i]

here is the yds readout if anyone can look at it thanks

Save date	December 17 2019
ECM No.:	6C98591A21
Diagnosis
	Code	Item	Result	Condition
	25	Fuel press sensor	Irregular	Out of specification
	13	Pulser coil	Normal
	14	Crank position sensor	Normal
	15	Water temp sensor	Normal
	18	Throttle position sensor	Normal
	19	Battery voltage	Normal
	22	Atmospheric press sensor	Normal
	23	Intake temp sensor	Normal
	26	Injector	Normal
	27	Water in fuel	No
	28	Shift position switch	Normal
	44	Engine stop lanyard switch	Off
Diagnosis Record
	Total hours of operation	301
	Code	Item	Occurred
	62	Fuel pressure too low	106.5
	22	Atmospheric press sensor	300.3
	18	Throttle position sensor	301
	25	Fuel press sensor	301.3
	27	Water in fuel	300.4
		Overheat	261.5
Engine Record
	Item	Result	Unit	Occurred
	Engine speed maximum	2950	r/min	301.3
	Fuel pressure minimum	0.12	MPa	266.9
	Over rev.control record	9	Times
	Overheat record	38	Times
Engine Monitor
	Monitor Item	Result	Unit
	Engine speed	0	r/min
	Fuel pressure (7.0±1.5)	11.2	MPa
	Fuel pressure (1015±217)	1624.17	psi
	Atmospheric pressure	1006.9	HPa
	Atmospheric pressure	29.8	inHg
	Ignition timing	-	deg
	Battery voltage (12-16)	13.26	V
	TPS voltage (0.5-4.5)	0.63	V
	Throttle valve opening (0-90)	2.7	deg
	Fuel injection duration	0	ms
	Water temperature (below 90)	41	°C
	Water temperature (below 194)	105.8	°F
	Intake temperature (below 70)	13.5	°C
	Intake temperature (below 158)	56.3	°F
	Electric oil pump	-
	Firing of cylinder #1	No
	Firing of cylinder #2	No
	Firing of cylinder #3	No
	Firing of cylinder #4	No
	Firing of cylinder #5	No
	Firing of cylinder #6	No
	Starter switch	OFF
	Engine stop lanyard switch	OFF
	Main switch	ON
	Shift position switch	ON
	Water detection switch	OFF
	Oil level switch (remote tank)	ON
	Oil level switch1(engine tank)	OFF
	Oil level switch2(engine tank)	OFF
	Oil level switch3(engine tank)	OFF
	Water temp switch (overheat)	OFF
	Dual engine system switch	OFF
	Shift cut-off switch	OFF
Data Logger[Engine operating hours according to engine speed]
	Engine speed	Time[h]
	- 1000 r/min	213.5
	1000 - 2000 r/min	16.2
	2000 - 3000 r/min	1.3
	3000 - 4000 r/min	31.5
	4000 - 5000 r/min	26.7
	5000 - 6000 r/min	12.1
	6000 - 7000 r/min	0
	Total hours of operation	301
Data Logger[Data comparison graph]
	Engine speed[r/min]	Fuel pressure (7.0±1.5)[MPa]	Battery voltage (12-16)[V]	TPS voltage (0.5-4.5)[V]	Water temperature (below 90)[°C]
	650	6.61	14.14	0.64	51
	650	6.61	14.28	0.64	51
	500	6.61	14.21	0.66	51
	550	6.61	14.06	0.64	51.5
	600	6.56	14.21	0.64	51
	850	6.66	14.21	0.64	41
	550	6.56	14.21	0.64	49.3
	550	6.61	13.99	0.64	49.7
	550	6.61	14.28	0.64	49.7
	550	6.66	14.06	0.64	50
	600	6.61	14.14	0.64	50
	550	6.61	14.36	0.64	50
	500	6.56	14.14	0.64	50.5
	700	6.61	14.28	0.66	50.5
	800	6.61	14.21	0.66	50.5
	700	6.61	14.14	0.64	52.7
	950	6.76	13.99	0.63	16
	800	6.71	13.92	0.63	33
	700	6.66	13.92	0.64	46
	250	11.2	11.87	0.55	27
	200	11.2	12.16	0.55	27
	200	11.2	11.28	0.55	32
	200	11.2	11.5	0.55	33
	400	11.2	12.01	0.57	35
	300	11.2	12.08	0.63	38.5
	400	11.2	12.96	0.63	39
	250	11.2	11.65	0.63	41.5
	450	11.2	9.89	4.12	42
	200	11.2	12.82	0.63	42