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-   -   Fuel pump help (http://www.mastercraft.com/teamtalk/showthread.php?t=54993)

Nateb 06-09-2013 11:05 PM

Fuel pump help
 
Completely stumped..... Boat is an 07 xstar SS with 6.0 crusader. Ran boat for about 3 hours the other day and everything ran fine with no issues. Make it 100 yards from the dock and the fuel pump dies. Cycle the key a few time pump kicks on and motor starts up with no issues. Make it another 10 yards boat dies again. Repeated same process cycling key, boat starts up just fine and gets me to the lift.

So without question it's the notorious fuel pump. Ok no biggie have a spare one brand new in the box just because I knew I was due for one (pretty sad knowing that owning a boat that retailed 100k when new but that's a whole other story) any way, threw the new fuel pump in and bam same exact problem. Hooked up to the computer and there are no fault codes, no check engine lights no alarms, nada.

Went through all the connections and checked all the grounds and everything looks good. Any ideas ? Also the pump is the exact same Carter pump used in all fresh water series, so the salt series should have no bearing on this issue that I would think.

Jim@BAWS 06-10-2013 12:06 AM

OK...you are upset at something that is unrelated...Did you purchase the boat new or used?

First problem is, a COMPUTER is not going to give you the answer you need.

You are correct on one thing...the fuel pumps are the same in a fresh or an SS boat

Jim@BAWS

davidstan 06-10-2013 08:11 AM

Quote:

Originally Posted by Jim@BAWS (Post 944630)
OK...you are upset at something that is unrelated...Did you purchase the boat new or used?

First problem is, a COMPUTER is not going to give you the answer you need.

You are correct on one thing...the fuel pumps are the same in a fresh or an SS boat

Jim@BAWS

Jim, as a dealer do you see many 08's in for pumps or did a tweak to the system take place between 07 and 08? I seem to read here about a lot of 07 and wonder if next yr we start reading about 08's and so on.

bturner2 06-10-2013 08:56 AM

Nate it does sound like fuel but I'm not so sure it is or was ever the pump. Based on your symptoms it sounds like you may have bad gas or a plugged filter. I think all of us have been bit with jumping to conclusions on problem resolution and starting throwing parts at a problem (see my stereo post if you need an example).

So the first questions would be.......

Is this your first time out this year?
Did you fill up recently?
When you pulled your pump were you able to make a visual check of the fuel quality?
When you had your pump out did you change the filters (especially the filter directly attached to the fuel pump)?
Were you able to check the fuel rail pressure before and after changing the fuel pump?
I believe the SS series has a water separator in line to the fuel rail. Did you change that first? and has it ever been changed?

Don't mean to fire a ton of questions at you but these are some of the thoughts I have based on your issue.......

CantRepeat 06-10-2013 09:23 AM

I don't recall off hand, but JimN, said something about the connector to the full pump itself and having seen issues with that in the past.

Nateb 06-10-2013 11:42 PM

Quote:

Originally Posted by bturner2 (Post 944697)
Nate it does sound like fuel but I'm not so sure it is or was ever the pump. Based on your symptoms it sounds like you may have bad gas or a plugged filter. I think all of us have been bit with jumping to conclusions on problem resolution and starting throwing parts at a problem (see my stereo post if you need an example).

So the first questions would be.......

Is this your first time out this year?
Did you fill up recently?
When you pulled your pump were you able to make a visual check of the fuel quality?
When you had your pump out did you change the filters (especially the filter directly attached to the fuel pump)?
Were you able to check the fuel rail pressure before and after changing the fuel pump?
I believe the SS series has a water separator in line to the fuel rail. Did you change that first? and has it ever been changed?

Don't mean to fire a ton of questions at you but these are some of the thoughts I have based on your issue.......


Yes first time out.
Yes it's fresh fuel
The filter and sock look brand new, no restrictions there that I can tell
No fuel water separator. It's the same fuel pump and system as the fresh water series.

I went through all my connections from the pump to the relays to the computer and no bad connections or corrosion. Took it out again tonight for about 3 hours and no issues. Will keep taking it out to see what happens. If not I would venture to say its the brain box. Really hope that's not the case$$$

slwayland 06-11-2013 10:44 AM

I have a 2008 x45 with mcx with the exact same symptoms.....I ordered the replacement $570 fuel pump from Mastercraft. (Scared to do the cheap auto zone version). Pump should be here today and I will advise what I find as well.....hmmmmm

chriscraftmatt1976 06-11-2013 12:05 PM

unhook the out hose from the fuel pump and cycle the key and you'll know real quick if it's a fuel pump issue. if gas doesn't squirt everywhere, bingo! may want to connect another hose to the pump and point it into a cup while a buddy turns the key for ya...

CantRepeat 06-11-2013 12:09 PM

Quote:

Originally Posted by slwayland (Post 945227)
I have a 2008 x45 with mcx with the exact same symptoms.....I ordered the replacement $570 fuel pump from Mastercraft. (Scared to do the cheap auto zone version). Pump should be here today and I will advise what I find as well.....hmmmmm

You could have purchased a fuel pressure test gauge for about $20 bucks. It would have let you know whether or not you need to spend near $600.

CantRepeat 06-11-2013 12:10 PM

Quote:

Originally Posted by chriscraftmatt1976 (Post 945268)
unhook the out hose from the fuel pump and cycle the key and you'll know real quick if it's a fuel pump issue. if gas doesn't squirt everywhere, bingo! may want to connect another hose to the pump and point it into a cup while a buddy turns the key for ya...

Just because it pumps fuel doesn't mean it's pumping or maintaining the correct pressure.


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