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Message started by Bigzuk on 05/31/07 at 19:42:45

Title: Acts like out of gas after long hill
Post by Bigzuk on 05/31/07 at 19:42:45

Hello all,
I'm new here with my 1st question. My '96 runs great but after a long up hill pull (we have lots of these in western NC) at 50 -60 mph it acts like I need to switch to reserve just after I back off the throttle. Any ideas? It has the stock muffler, carb screws show they have been out and the idle screw plug has been drilled out. It almost never pops or back fires, only a small poof when shut off, gas mileage in the mid to upper 40's and a little black soot in the end of the muffler makes me think the first owner did some jetting? With all that - is this a too lean at top end problem that others also have ???? Thanks for any help with this and for all the great info I've been reading here.

Title: Re: Acts like out of gas after long hill
Post by Reelthing on 05/31/07 at 19:47:48

only ever does this after a hard hill climb?
by the way does it cut out when you let up on it or it's already cutting out going up the hill?

rest of the time runs aok your saying I believe?

Title: Re: Acts like out of gas after long hill
Post by Bigzuk on 05/31/07 at 19:54:58

Runs great up hill, just when I've been 3/4 throttle or more for 1/4 - 1/2 mile and back off it dies just like when you run out of gas. The first few times I thought I was out. Turned to resurve, it cought up and ran fine.

Up to about 60 - 65 it will outpull my buddy on his 883 sportster up the same hill.

Title: Re: Acts like out of gas after long hill
Post by Greg_650 on 05/31/07 at 19:59:28

How close to Asheville?

I thought that I knew about hills before we left there. Mt. Mitchell is nothin' :P

Title: Re: Acts like out of gas after long hill
Post by Bigzuk on 05/31/07 at 20:01:12

I'm in Marshall NC about 25 miles north of Asheville,

Title: Re: Acts like out of gas after long hill
Post by Greg_650 on 05/31/07 at 20:06:39

Bigzuk wrote:

I'm in Marshall NC about 25 miles north of Asheville,

Yep. Up near the Parkway on 25. Nice country for sure. I think that I had to do service in an Ingles up there....

We lived in Arden, just south of Asheville.

Title: Re: Acts like out of gas after long hill
Post by Bigzuk on 05/31/07 at 20:13:01

Yep, you know the area. Great place to enjoy my Savage on tight winding mountain roads. You also know how many hills we ride up and down. It stinks to have to feather off the gas near the top of a long up hill just to keep it from knocking off.

Title: Re: Acts like out of gas after long hill
Post by verslagen1 on 05/31/07 at 21:35:07

Try the same hill in reserve and see if you have the same problem.

I suspect the vacuum petc0ck. At full thottle, you'll have minimum vacuum pressure available. If it's a long hill, you might drain the bowl before you get to the top. ;D

Title: Re: Acts like out of gas after long hill
Post by Greg_650 on 05/31/07 at 22:19:58

Yeah, you have a point, but I've ridden the same terrain. Never noticed it.

Title: Re: Acts like out of gas after long hill
Post by Greg_650 on 05/31/07 at 22:26:18

Bigzuk wrote:

Hey, make sure you go to Cherokee for that biker thing this year. At the moment I forget the name. That is one bash that I miss....Of course I think that the last time is really what ruined my hearing :P

As Verslagen says, try the same ride on PRI and see what happens. It might not be a definitive answer, but it'll get us in the right direction.

By the way...how's the kudzu?

:P

Title: Re: Acts like out of gas after long hill
Post by justin_o_guy on 05/31/07 at 22:27:09

Does it run oput of gas while you are holding the throttle open or is it dying when you let off the gas?

Title: Re: Acts like out of gas after long hill
Post by Kropatchek on 06/01/07 at 01:50:37

To eliminate the petc0ck problems put the little handle to PRI.
Check the idle RPM to be 1000-1200 RPM.
Ease the throttle i.s.o closing it abruptly.

Any improvement: let us know

Title: Re: Acts like out of gas after long hill
Post by Bigzuk on 06/01/07 at 04:30:49

Thanks for all the helpful ideas! It makes a newbe feel welcome. It runs fine with the throttle held to keep my speed on the hill, it's only when I get to the top and bring the throttle back to half or less that it does it. And NO I'm not going to hold it full open over the top and down the hill ;D if I did, I might not be able to post the results :-X
Greg it hasn't rained in more than four weeks- even the Kudzu is brown. I like to look on the bright side, four weeks of high 70's days, high 50's nights, great mountains to ride and no time wasted mowing grass!

I'll try the same hill with the pethingy on res. or pri and let yall know.
Oh, I was given the Bigzuk handle from my 4 wheel drive club for my Suzuki Samuri rock crawler with 10" lift & 33" tires, I hope no one on this list was using it?

Title: Re: Acts like out of gas after long hill
Post by Greg_650 on 06/01/07 at 04:53:16

Bigzuk wrote:

I'll try the same hill with the pethingy on res. or pri and let yall know.

The effect of using PRI or RES is different, though. One is vacuum operated and one is not.

Quote:

Oh, I was given the Bigzuk handle from my 4 wheel drive club for my Suzuki Samuri rock crawler with 10" lift & 33" tires, I hope no one on this list was using it?

You're probably safe with that handle since I don't think anyone in here has a thumper quite like that one :P

You can check other usernames by clicking on "Members" above.

Title: Re: Acts like out of gas after long hill
Post by Bigzuk on 06/20/07 at 10:59:01

Thanks to all that responded with helpful ideas. Sorry to take so long to get back. I've now got a clear in line fuel filter so I can see the fuel flow. Today I tried the same old hill, it cut out at the top, changed to res. and at the now slower speed it poped and sputered with some fuel & air in the filter. When I changed to PRE the filter filled up and it started running OK. Looks like I need to check the vacumn hose.
Is there anything else I should check?
Thanks for everyone's help!!!!

Title: Re: Acts like out of gas after long hill
Post by verslagen1 on 06/20/07 at 11:27:16

Any intake mod's?
Desnorkle or K&N filter?
Those mod's will lean out the carb and reduce the vacuum pressure to the petc0ck.

I got the same problem, but it's all the time. So I run in res all the time where it runs great. I took it apart once, gonna do it again once I get around 2it.

Title: Re: Acts like out of gas after long hill
Post by scannerzer on 06/20/07 at 14:30:59

i'm also new and have never posted before so HELLO

check the vacume hose is connected to the tap ...
i forgot to reconect after having the tank off and had this problem

Title: Re: Acts like out of gas after long hill
Post by Bigzuk on 06/21/07 at 07:54:29

It has the stock air filter and the air intake looks stock. Someone before me drilled out the carb plug ( and screwed up the brass idle adjustment screw so bad I cant move it). I've not checked the jets, but the carb screws show someone has been in it. I just installed a HD dyna pipe. I have no pop or backfire problems now or before the HD pipe change (sometimes a small puff when I cut it off). It runs even better now, the header is light gold not blue, and the HD muffler has a little black soot just like the stock pipe did. So I think the jets have been addressed before I got it?

BTW, I get the same small puff at shut off with my stock Suzuki Vinson 500cc single ATV ??? Must just "run in the family" ;D

Title: Re: Acts like out of gas after long hill
Post by dewey on 06/23/07 at 14:27:26

I had a similar problem last year. The only difference was that it would happen any time I rolled off the throttle after an extended period of constant speed (not necessarily a hill). The problem was a small hole in the vacuum hose going between the throttle and the carb.

Now, the problem's back this year, and I don't know what's wrong. I took the vacuum hose off to inspect it for holes, and I found some fuel in there. That doesn't seem normal, but I don't know if it's the source of my problem.

I do have a K&N air filter, though, so maybe I'll take the advice of a previous post on this thread and replace it with a stock filter.

-Dewey

Title: Re: Acts like out of gas after long hill
Post by verslagen1 on 06/23/07 at 14:48:05

If you got fuel in your vacuum line, there's a good chance if came from the petcock. You need to take it apart and inspect for holes in the diapham.

Title: Re: Acts like out of gas after long hill
Post by barry68v10 on 06/24/07 at 05:22:19

Quote:

If you got fuel in your vacuum line, there's a good chance if came from the petthingy. You need to take it apart and inspect for holes in the diapham.

You can just go for the "Petthingy Mod" in the tech section and never worry about vaccuum lines or diaphrams again... I kept having "phantom" fuel problems until I converted my petcock to simple, manual ON-OFF function and removed the fuel screen to replace with an inline fuel filter. Keeps the inside of my tank squeeky clean ;D