4.3

[Raarons78]

My 2006 4.3 runs fine, idles perfect.... Until it heats up... starts sputtering, idling low.....

On the open water, giving gas it starts to sputter & wants to stall... I can pull it back to neutral to save it... & Then hit it again & get it to plane...... Runs perfect, speed up, slow down, until we stop again.. then its a fight to start or keep it running until I can speed up.....

Local repair shop guy thinks it's bad gas... Which according to him, its always bad gas..

Probably has more seafoam than gas in it by now, (jk)

 

[Rick Stephens]

First, no such thing as a mechanic in a can. The Seafoam is a total waste of your money when you have a problem.

Have you pulled your fuel water separator and dumped its contents into a clean container to see if there is anything but clean gas in it?

Have you checked the filter on the carburetor. I'm making assumptions here since you don't say whether you have carbed or injected.

Personally, sounds like you need to rebuild the carb. But not really enough information to say that. Might be something as simple as a plugged fuel tank vent. Build up vacuum, stop, air slowly gets in and repeat.

Rick

 

[alldodge]

Serial number please?

 

[harringtondav]

I believe 2006 is EFI. Insure free fuel flow per the above. EFI is complicated and over my head. The pros here can give pointers, but it may require a scan/Rinda tool to find a faulty controller input.

 

[Raarons78]

It is a carb.. I thought I mentioned that in the OP.... I did change the water separator, looked clean, like pure fuel.. also changed the plugs, just because IDK when the last time it was done & it was running rich....

That filter in the carb, I couldn't find it.... I've heard stories that it exists, but I can't locate it.. it's been a while since I've messed with a carb engines.....

& Also, all of this was done at the slip, hopefully I can pull it out this evening & poke around this weekend.... & I'll have the serial number when I pull it out of the water..

 

[alldodge]

Being a carb and 2006 it probably has the TKS carb
Runs good until it warms up. The TKS has an enrichment circuit which the module closes down once warmed up. The is not a filter inside the carb, but probably going to need a carb rebuild

SN will verify if assumptions are in line

 

[Raarons78]

0W371379....

IDK if it's normal or not, but it hisses until it warms up... Then the hiss slowly dies down & the idle problem starts... enrichment module?

 

[alldodge]

Thanks for the SN, carb is TKS

IDK if it's normal or not, but it hisses until it warms up... Then the hiss slowly dies down & the idle problem starts... enrichment module?

Yes, that is the enrichment module extending the rod until it shuts if off

 

[Raarons78]

So, we think the carb needs rebuilt?

I did change the water separator, plugs... Thought maybe cap & rotor too, but haven't had a chance yet..

 

[THenning]

I had this problem once. Turned out to be the ignition coil.

Cap and rotor are good to replace on that motor, cant ever go wrong with carb rebuild, but ignition coil is pretty cheap and easy to throw into that list.

 

[Scott Danforth]

Its almost never the ignition coil

 

[alldodge]

So, we think the carb needs rebuilt?
..

Yes, It sounds like a carb issue

 

[Raarons78]

Update... Had the carb rebuilt, supposedly... I say that because the mechanic didn't sound optimistic, (another supposedly) couldn't replicate the problem..... Which is wild because it takes 5 mins to warm up & then the issue begins, on the lake...

anywho..... It for sure is idling better, but if I throttle up, it still cuts & sputters & then takes off if I'm feathering it... If I don't feather it, it'll stall out...

Still think it's the carb & hes just an idiot? I'm leaning toward idiot, because it's always, always, always bad gas... Maybe that's an easy out... But that cost me a month of slip rental, time & no boating....

 

[alldodge]

If it was the fuel pump even feathering wouldn't let get up, and even if it did the motor would die out shortly from lack of gas

To accelerate the carb must supply extra gas as the throttle goes forward. The accelerator pump must squirt gas in and the power valve allows for more fuel as rpms increase.

If it was bad gas there would be less power and lower WOT

So long as timing is correct, its getting to much gas or not enough. If to much gas the plugs will be black and soot will form

Dis connect the throttle linkage and see what kind of stream of gas you get when its pumped