1996 GTI Fuel System Question(s)

[cadyshac]

I have a 96 GTI, it starts easily but stumbles going from half to full throttle. I had the orginal grey lines, replaced them with new, no real difference. I am sure it is starving for fuel, it will accelerate but within a few seconds bogs down. Yesterday I pulled the carbs and cleaned the internal filters/screens. They had some gunk but not sure it was enough to cause the problem. I checked the two check valves, the small round one that lets air in is fine. The longer one under the rub strip that lets air out is spring loaded, I blew wd-40 thru it, it did have some "liquid" in it and may have been stuck, would that cause my problem? Also I added an inline filter before the carb's, it is see thru and a "lawn and garden" type. Is it possible it wont let enough fuel thru to the carb's under full throttle condition?
I know, lots of questions, thanks for your help.

Cady

 

[LouDoo]

A lawn mower filter is way too small, use a Fram G-2 or equivalent. Also when you changed out the fuel lines did you clean or replace the fuel selector valve?

Where in KY are you located?

Lou

 

[brock1]

what do you mean stumbles.......does it do it the whole time in the hafl to full throttle range or only once then clears out.....you ghave a 717 engine correct

 

[cadyshac]

By stumble I mean it runs from idle up to about 25 mph fine. when you go full throttle it accelerates for a few seconds then fall flat on its face. It is not flooding it is running out of fuel. New to pwc and not sure if engine is 717 or not.

Loudoo I will change the filter and I am up north, Kenton co.

 

[LouDoo]

My son lives in Park Hills, he comes down and we ride at Herrington Lake, maybe you would like to join us sometime.

Lou

 

[cadyshac]

Ok help please, I pulled the intake baffle out of the fuel tank, it was pretty clean. I replaced my inline filter with a fram g2 inline filter. Put the ski in the water with the air box off but the flame arrestor on. Starts up fine, no problem, idle is a little rough and does not want to adjust very easily. I tied the ski to the dock and tried some full throttle runs with it in neutral, ran up fine and stayed there without starving for fuel or stumbling. But in forward and if you hammer the throttle the ski takes off for about 3 seconds and then falls flat on its face. I put the air box back on and it will run from idle up to 30 mph no problem but if you go to wide open throttle at any time it will try to accelerate and then fall flat on it's face and sometimes even stall out but restarts no problem. I tried putting it in reserve and it runs much worse like that, will barely run at all. I have blown gumout thru the selector switch and it seems to be clean and moves easily from position to position.

Is there any way this could have something to do with my jet drive? I do not have a problem with hi revs or hitting the rev limiter. I have looked at the impeller from under the ski and it all looks clean in there. There is a small stream of water that comes out the back of the ski above the water line just below the handle. It is a very weak stream, should this be a more powerful "blast" of water coming from there? I have read "rave valve" on here, I have no idea what that is?

 

[Strizzo]

You need to pull the carb and At the least clean the internal filter if not do a full rebuild on it. You are running it lean on the top end and if you keep at it, you run the risk of burning up the motor.

 

[cadyshac]

I already did that (in my original post). I bought this sea doo used, 1 owner and I know the owner. Supposedly the carbs were rebuilt 2 years ago.
No way this can be related to debris in my jet drive? I dont see anything in there looking from underneath.

What about the jet of water that comes out the back? Should there be one? How strong of a stream?

 

[ocod]

I already did that (in my original post). I bought this sea doo used, 1 owner and I know the owner. Supposedly the carbs were rebuilt 2 years ago.
No way this can be related to debris in my jet drive? I dont see anything in there looking from underneath.

What about the jet of water that comes out the back? Should there be one? How strong of a stream?

Did you mess with the HS needle setting?
Should be at zero turns out(aka all the way in)

 

[nevitt4]

did u clean out the carbs after replacing the fuel lines

 

[cadyshac]

I pulled the caps and checked the hi speed screws, I may have turned them in 1/16 of a turn at most so basically they were already all the way in.

I replaced all the lines and cleaned everything first, ran the ski, no go so then pulled and cleaned the carb filters, no real change.

I just pulled my plugs and they are black after about 2 hours of use so I am not running lean, at least not at the lower speeds that I can run.

 

[nevitt4]

im going to throw this way out there, but im thinking mabe a rectifier,

 

[cadyshac]

Problem solved, fuel selector switch!!!!, Thought it was clean but rubber guts inside of it were falling apart and plugging everything up.