2005 vmax hpdi 200 idle issue

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bamajoker

Petty Officer 3rd Class
Joined
May 15, 2010
Messages
75
The past two times I have taken my boat out I have had problems with idling.

Here is whats going:

When I first start it in the morning it idles real rough.

Later in the day when I would pull up to a fishing hole and place the engine in neutral the motor would die.

When I crank the motor back up it was hard to start and would die quickly if it did crank.

I noticed if I put then engine In Gear real quick it would idle normal.

Well afterthis lol I got it to start up and it idled but it sounded like only 2 cyliders were firing or as if it was missing. When I put it in gear every thing was ok.

Then at the end of the day it idles and purs like a kitten ... perfect

All day the motor runs great in gear running at any rpm range.

All the filters have 50 hours as does the power head and plugs.

I checked compression with some cheap rent a tool gauge from autozone
All cylinders were at 110 115 range.

Any ideas?



The motor run great other then this.
 
C

Capt Ken

Commander
Joined
Jul 30, 2002
Messages
2,270
Re: 2005 vmax hpdi 200 idle issue

You need to check the pressure on the HP pump and the only way is with the diagnostic computer.
 
C

Capt Ken

Commander
Joined
Jul 30, 2002
Messages
2,270
Re: 2005 vmax hpdi 200 idle issue

Should be 800 psi give or take some. The numbers will show red on the screen if out of specs.
 
B

bamajoker

Petty Officer 3rd Class
Joined
May 15, 2010
Messages
75
Re: 2005 vmax hpdi 200 idle issue

Capt Ken said:
Should be 800 psi give or take some. The numbers will show red on the screen if out of specs.
Click to expand...

Did you look at pictures of print out?

It show 250 psi but rpms at 0

Next page shows mpA fuel pressure 7 ?
 
B

bamajoker

Petty Officer 3rd Class
Joined
May 15, 2010
Messages
75
Re: 2005 vmax hpdi 200 idle issue

According to this print out at

550 rpms = 6.6 mpa - 950 psi

5400 rpm. 7.1 mpa. 1022 psi

Someone has told me it could be strainer on top of vst filter? Does this sound right?
 
C

Capt Ken

Commander
Joined
Jul 30, 2002
Messages
2,270
Re: 2005 vmax hpdi 200 idle issue

You also have low battery voltage. I would replace the filter between the VST tank and the high pressure pump first. Then replace the filters in the pump and injectors if that didn't work.
 
B

bamajoker

Petty Officer 3rd Class
Joined
May 15, 2010
Messages
75
Re: 2005 vmax hpdi 200 idle issue

Capt Ken said:
You also have low battery voltage. I would replace the filter between the VST tank and the high pressure pump first. Then replace the filters in the pump and injectors if that didn't work.
Click to expand...

Do you think dirty injectors could be the cause also?
 
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