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DieselPWR
06-15-2010, 09:56 PM
Was wondering if anyone out there could help me with a inconsistent problem I had on my powell trip. Typically we'd go out early morning for a session and we would have no issues. Then we'd come back for a bit and as the day heats up we'd head out again. The boat would start and then die, or start and run for a bit and when I'd idle up it would die. Or sometimes it would run and I'd be fine. I'd run the blower and lift the rear storage doors to vent it out beforehand. Figured it have to be something with the fuel delivery. Temps and Oil Pressure look normal. When the key is in you can hear the fuel pump working fine. It has never done this before this trip. Any ideas?

ajholt7
06-15-2010, 10:06 PM
Do you just hear the fuel pump running or does it stop. If you just hear it running and running you are most likely vapor locked. Mine does it if I sit for a while on a hot day after riding for a while. I just pop the hatch and let it cool down in there and it is fine.

Timmy!
06-15-2010, 10:06 PM
Looks like others have a similar issue: http://www.tigeowners.com/forum/showthread.php?t=12485

I also talked to this local RZ2 owner, Shane, about his alternator/electrical problems that he is having. I think he had the alternator load tested and it is fine but is still having some sort of charging issue:
http://www.tigeowners.com/forum/showthread.php?t=12392

You're still under warranty though, aren't you? 3 years? You should still have a full year left.

DieselPWR
06-15-2010, 10:12 PM
Do you just hear the fuel pump running or does it stop. If you just hear it running and running you are most likely vapor locked. Mine does it if I sit for a while on a hot day after riding for a while. I just pop the hatch and let it cool down in there and it is fine.

It runs and then stops. Was thinking it might be vapor locking as well but its hours after riding when it happens.

ajholt7
06-15-2010, 10:13 PM
It runs and then stops. Was thinking it might be vapor locking as well but its hours after riding when it happens.

Still could be. All that heat trapped in there. Try leaving the hatch open and see what happens. If the fuel pump stops though you would think it has gotten fuel.

Joeprunc
06-15-2010, 10:13 PM
Sounds almost exactly like an issue I had on my old Silverado truck (It had the Chevy 5.3L engine)...it ended up being the fuel pressure regulator.

DieselPWR
06-15-2010, 10:17 PM
It runs and then stops. Was thinking it might be vapor locking as well but its hours after riding when it happens.


Looks like others have a similar issue: http://www.tigeowners.com/forum/showthread.php?t=12485

I also talked to this local RZ2 owner, Shane, about his alternator/electrical problems that he is having. I think he had the alternator load tested and it is fine but is still having some sort of charging issue:
http://www.tigeowners.com/forum/showthread.php?t=12392

You're still under warranty though, aren't you? 3 years? You should still have a full year left.


Sounds like I'm having the same problem Moki was.

Still under warranty, wierd thing is that I took it in for my 200 hr service couple days before. Not sure they would be able to replicate the issue to diagnose it.

Timmy!
06-15-2010, 10:28 PM
Congrats on 200 hours...I'm still trying to get there! :P

See if you can get it to do it still and if you can, take one of them out on the boat and water test it.

Joeprunc
06-15-2010, 11:42 PM
Sounds like Moki and AustinSouthSide were having issues with the motor cutting of while running...going from low speeds to idle.

The way I interpreted your symptom was going out in the morning, bringing the boat to the dock and having lunch. Coming back in an hour or so, then trying to start your boat. The boat either will just crank, or it catches and within a few seconds it spudders and dies almost like it was starved for fuel. After two or three attempts its fine. And these symptoms occur more so when its hot out. (This is exactly what my 2000 Chevy truck was doing).

But to me these sound like two completely different issues.

I would bet my next case of beer on the fact that its the fuel pressure regulator.

ajholt7
06-15-2010, 11:53 PM
I'm sticking with vapor lock on this one.

Joeprunc
06-16-2010, 12:14 AM
It does sounds like vapor lock, but I'm assuming the Z1 is EFI. Vapor lock is quite rare in fuel injected motors since the entire system is pressurized.
http://en.wikipedia.org/wiki/Vapor_lock

But then again I am only wagering a case of beer :D

ajholt7
06-16-2010, 12:20 AM
Mine is fuel injected and still does it. You can hear the fuel pump trying to get fuel. He did say though that his fuel pump stops like it is pressurized.

TeamAllen
06-16-2010, 02:44 PM
Not sure it"s the same issue, since your boat is so new, but some of us with older boats have had a similar issue. There are quite a few threads on it already. It only happens at Lake Powell for me. It obviously could have something to do with the fuel supply in the area. I have been using a fuel additive from Sta-Bil for marine use. I was worried it was the ethanol % in the fuel?

The best way to describe the problem i get is hot soak. It only occurs when driving fairly hard, like a ski run, then shutting it off and sit for a few minutes. The heat builds up and starts and dies. I started to notice the temp gauge would climb a few degrees after running it hard. When I came back off the throttle i would notice the gauge drop a few degrees, maybe 5? So now I let it idle till the gauge drops and then turn it off. That and the fuel stabilizer have been 99% effective.

DieselPWR
06-16-2010, 07:02 PM
Mine is fuel injected and still does it. You can hear the fuel pump trying to get fuel. He did say though that his fuel pump stops like it is pressurized.

Correct, I can hear the fuel pump kick on and stop after its pressurized.

DieselPWR
06-16-2010, 07:03 PM
Not sure it"s the same issue, since your boat is so new, but some of us with older boats have had a similar issue. There are quite a few threads on it already. It only happens at Lake Powell for me. It obviously could have something to do with the fuel supply in the area. I have been using a fuel additive from Sta-Bil for marine use. I was worried it was the ethanol % in the fuel?

The best way to describe the problem i get is hot soak. It only occurs when driving fairly hard, like a ski run, then shutting it off and sit for a few minutes. The heat builds up and starts and dies. I started to notice the temp gauge would climb a few degrees after running it hard. When I came back off the throttle i would notice the gauge drop a few degrees, maybe 5? So now I let it idle till the gauge drops and then turn it off. That and the fuel stabilizer have been 99% effective.

Mine is hours after we had our early session.

chpthril
06-16-2010, 07:29 PM
When/where did you last fill up the tank? Could be a batch of leftover winter blend, which can vapor-lock when the temps heat up.

DieselPWR
06-17-2010, 12:46 AM
Filled it at Page and it was almost empty before I did.

Timmy!
06-17-2010, 03:07 PM
Sounds to me like it's Lake Powell gas if multiple people are having the same issue! :D

DieselPWR
06-22-2010, 07:43 PM
CRAP! Took it out to the lake last weekend, first ride of day, and it was a cool day -> and it didn't start. Topped it off with local gas as well. At WWS now, waiting on a response.

Timmy!
06-22-2010, 08:09 PM
Bummer! I was wondering where you were. I didn't think I could possibly miss you 2 days in a row (actually 3 if you count last night).

buffman
06-22-2010, 09:13 PM
Diesel
I maybe able to help -
Last year at Powell early ride would get sputter and stop and wouldnt start for a while....and once it was getting hot...

Got back to WWS and I had them put on a FRESH WATER filter system and hasn't happened since...it was from all the debris in the water at Powell sitting there collecting over night next to houseboat etc.

They should be able to tell you if it is it as they may see stuff still stuck in there.

Good luck!!!

sse01
06-22-2010, 09:59 PM
We have a 2008 that started having this same exact issue this spring. It would only occur after we ran the boat until it was good and warm, then shut down for 1.5-2 hours. It would start up fine, run for 1-2 minutes and start running very rough or die

After it was determined that it was vapor lock, we started depressing the valve on the fuel rail to let the air out (or just continue cranking until the air pocket pushed through).

The problem has now gone away with no more winter blends. I am going to attempt to have this looked at next winter to see what we can do to alleviate the problem.

DieselPWR
06-23-2010, 07:33 PM
Diesel
I maybe able to help -
Last year at Powell early ride would get sputter and stop and wouldnt start for a while....and once it was getting hot...

Got back to WWS and I had them put on a FRESH WATER filter system and hasn't happened since...it was from all the debris in the water at Powell sitting there collecting over night next to houseboat etc.

They should be able to tell you if it is it as they may see stuff still stuck in there.

Good luck!!!

Was the debris clogging your intake causing you to overheat? My temps are fine when the problem occurs.

buffman
07-01-2010, 09:42 PM
not overheating but definite debris in the intake
so what was the verdict?

Joeprunc
07-06-2010, 08:11 PM
Have you had any luck diagnosing your issue?
-Fuel pump?
-Fuel pressure regulator?
-or is it vapor locking?

DieselPWR
07-13-2010, 08:36 PM
Changed low pressure fuel pump and still had some trouble. Then he changed any loose connections going into the fuel pumps and have not had an issue since.

sparky216
07-14-2010, 05:14 AM
we just had a similar issue, and the dealer said that we had an air bubble in the fuel filter..........I'll let you know if that was the problem come this weekend. Good luck

BrownClown
07-14-2010, 07:17 AM
Changed low pressure fuel pump and still had some trouble. Then he changed any loose connections going into the fuel pumps and have not had an issue since.
They changed the LP fuel pump on mine too with the same result. Changing the fuel pickup line to a hard line from a soft line did the trick.
Mine did exactly what yours did and they spent half the summer throwing parts at it before Harvey Smith suggested this. It's run like a top ever since.

jsz
08-06-2010, 03:24 PM
My 02 350 merc was having the same problem and people were saying it was vapor lock. Here were the things I tried that at first worked but slowly got worse and harder to start until it wouldn't start at all:

- let air out of fuel rails
- cooled fuel rails
- removed ball from anti-siphon valve
- let motor cool over night
- cycled ignition multiple times to prime fuel system (you could hear the hp fuel pump turning for a couple seconds each time)

Nothing worked.

It would however run fine for a few seconds if we put some fuel in the top of the throttle body. This told me it was somehow not getting fuel even though the HP fuel pump sounded like it was working normal.

Put a new HP fuel pump in and all has been good

jsz
08-06-2010, 03:35 PM
Do you just hear the fuel pump running or does it stop. If you just hear it running and running you are most likely vapor locked. Mine does it if I sit for a while on a hot day after riding for a while. I just pop the hatch and let it cool down in there and it is fine.

The only time my fuel pump kept runninig non stop (after turning key but before starting)was when the relay was bad.

My old fuel pump that was bad still sounded normal and would shut off after a second but it would not actually prime anything.