Volvo 5.0 Gxi engine/fuel pump problem??

[Miniwheat29]

I have a 2003 Volvo 5.0 Gxi engine in my boat. It starts great and will run fine at low RPM 2800 or less. If i go above that it will start to struggle and loose power, start to back fire and i have to let off gas shut engine off and then the process starts over. Does not ever stall out completly and always starts back up. I also will get a high pitch whine from the fuel pump assembly. Any input on this issue would be a great help.

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Hello,

I just had the same exact problem with mine though mine is slightly different model. On mine the fuel pump on the back of the motor (high pressure), above the VST/fuel box, had a clogged inlet screen. There is a screen on the end of each fuel pump which commonly gets clogged. My post is below, it took me about 1 week to figure it out. If it is the same problem that whole box may be filled with crap, you may have to flush it out with gas.

Chad

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Oh and by the way, my fuel pump was screaming before it happened, there is a video on my post and you can hear how looud it is. After i cleared the clog it went silent. The post is called 1994 Volvo Penta GI PMDA ......

Chad

 

[Miniwheat29]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Chad,
My fuel pump is all one sealed unit, I do not see a screen to clean. Do you know if you can take the individual pumps apart? Also I noticed where the fuel filter gasket seats to the frame the paint appears to rub off with your finger. I wonder if it is pulling in air from a bad seal????

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

is this an electric pump, if so the screen is in the end of it, you do not have to take the pump apart, you just have to remove it and look in the end

 

[Miniwheat29]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Yes it is an electric pump. I did remove the pump i do not see any screens tho. Do you have to remove the pump from the mounting bracket? It seems like the mounting bracket is actually the top of the pumps is that not the case? I took the few screws out of what seems to be holding the bracket to the top of the pumps but it was really stuck together. I tapped on it with a screw driver to knock it free. I did not know if that was supposed to come off so I left it on. Is that where the screen is? its a Carter P61341S assembly. I would like to find this screen because it seems it could be a big factor.

Thank you...

 

[Gbiaggi]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Hi, this is exactly the same engine I have, and is doing exactly the same, I'm turning nuts changing sensors, I'll try with the screen in the back of the fuel pump....

 

[Miniwheat29]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Have you found this screen? Where excatly is it located and how do you get to it?

 

[Gbiaggi]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

I couldn't yet, is hard to get there in my boat. I'll post it as soon I find it.

 

[Miniwheat29]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Thanks

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

hey guys, pics coming, you have to remove the pump from the VST box. You take the banjo bolt out of the end, and remove the metal line. Then it sorta slips outa bracket.

Do not take that box apart!!! I am not sure why but I have read not to take it apart. The screen is in the banjo bolt end of the pump, not the line with the metal fuel line.

Chad

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

I have included a pic of the engine, the pump i am talking about is in the back left side of engine laying on its side. It is mounted to that box. On the right side of it there is a bolt going through the box into the pump. remove the bolt first, then remove the metal line from the left side of the pump. Take it out and look into the end, and you will see the screan. the pics above are looking into the end of the pump at the clog.

Chad

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

You will almost definately need new O-rings to put it back together, that box may also be filled with crap like mine, likely need to flush it out. when replacing o-rings make sure they are designed for fuel, usually redish/brown in color, the black ones will just melt and fail.

sometimes local parts stores sell the o-rings.

Chad

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Yours may also be different then mine, a pic of your setup would help. Don, do you know if he has the same pumps as me, just trying to help out if i can, i went through the ringer on mine overr a stupid clogged screen.

Chad

 

[Miniwheat29]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

I will have to see if i can locate that tonight. Thanks

 

[cc190cc]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Hey,

I am actually going out on mine tonight, I will take better pics in case you need them and I will check back later.

Chad

 

[gbeltran]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

CC190, the pump on the 2003 is different than what you have. It's an assembly that consists of a filter, low pressure pump, high pressure pump and reservoir all in one assembly. They can be taken apart, I wouldn't recommend it unless you have some good mechanical skills, but you cant source the low pressure pump, you can buy the high pressure or the whole assembly. I wish they had stayed with the setup like you have, both pumps are serviceable. There seems to be a lot of people having problems with the later model assembly and it isn't cheap.

 

[Goin' Deep]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

Well, looks like i'm joining the club. My 2005 5.0 Osi -EF Volvo Penta engine (280hrs) started doing the same thing as everyone elses on this thread. Whining (sounds like a high pitched fan belt noise, but it's not), the engine will sputter and sometimes backfire. It is a intermittent problem, as when it goes "away", the boat runs fine, but when it rears it's ugly head, the engine just sputters as stated above, none to comforting on a single engine boat when I'm 10+ miles off shore. As others have stated, I tried to troubleshoot the problem and changed my 8 plugs (AC Delco41-101 IRUDIUM), cap and rotor, changed my fuel filter (even though I only had 10 hours on last one from my Winter Maint.) and STILL the problem persists.
Doing a search on YAHOO for "Volvo Fuel cell whine" results in MANY forum threads (on different web sites, and different Volvo Penta engines) on this topic. It seems obvious that there is a wide spread problem, and I don't know much about class action law suits, but it seems there's no shortage of Volvo marine engines with this problem.
My extended Warranty is valid until Spring 2012, so I plan on calling the mechanic at my Marina (Volvo certified) and starting the ball rolling. I'm pretty mechanically inclined and have the Seloc Repair manual, but there's something about fuel leaks that sort of put me off for doing this repair, even though I CRINGE at the labor rates my marina charges (YES, even related to Warranty work).I guess I'm just venting.... GRRRRRRRR! -TomT

___________________
2005 Albemarle 248XF

http://www.albemarleboatowners.com/BoatGalleries/KeepinItRealGallery.html

 

[coastalcruiser]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

wow those inlet screens are dirty, my 97 had a few specks but not that much. I just had my low pressure pump replaced.

* The mechanic told me to prime the fuel filter with fuel before installing.
*I plan to make a fuel pressure tester, supposed to be the best way to check for problems. if anyone has one can you post a photo?
*Inspecting vst is important because of corrosion and salt problems and build up inside of gasoline deposits, they are fragile and gaskets are expensive. they also have a float inside that can surely jam up.

 

[Pargolf]

Re: Volvo 5.0 Gxi engine/fuel pump problem??

I have a 2003 Volvo 5.0 Gxi engine in my boat. It starts great and will run fine at low RPM 2800 or less. If i go above that it will start to struggle and loose power, start to back fire and i have to let off gas shut engine off and then the process starts over. Does not ever stall out completly and always starts back up. I also will get a high pitch whine from the fuel pump assembly. Any input on this issue would be a great help.

I have a 2004 Volvo 5.0 Gxi engine, and it was doing the exact same thing. Problem was intermitten, and would come and go. Sometimes the engine would run great, other times it would spit, sputter, and back fire when trying to accelerate. Put up with this for a year, and finally took it to a dealer. They initially thought it was the high speed fuel pump, and replaced that, but then had to also replace the fuel module assembly? Very expensive even with extended warranty. Sounds like other folks have had similar issues with this problem.