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General Category >> Rubber Side Down! >> Idle problem.
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Message started by arteacher on 10/09/11 at 13:36:59

Title: Idle problem.
Post by arteacher on 10/09/11 at 13:36:59

I tried the tev mod to cut down on backfires and it sort of worked, except when I let the throttle off the idle would stumble way down and sometimes stall.
So I bought a new spring, installed it and I still have the same problem.
I checked that I hadn't damaged the diaphragm by filling it full of carb cleaner and seeing if it leaked. It didn't. The vacuum passage to the throat is clear. I sprayed carb cleaner in it while the bike was running and the motor would stumble. The little hole in the cap is clean. I can push a light gauge wire through it.
Where else do I look?

Title: Re: Idle problem.
Post by justin_o_guy2 on 10/09/11 at 13:53:36

I checked that I hadn't damaged the diaphragm by filling it full of carb cleaner and seeing if it leaked.

IDK what its gonna take to solve your problem, but I wouldna done that,,

Title: Re: Idle problem.
Post by verslagen1 on 10/09/11 at 14:09:07

Idle jet?
idle rpm?
filter?
muffler?
petcock?

Title: Re: Idle problem.
Post by arteacher on 10/09/11 at 14:15:06

55 pilot with bleed holes
!!00
K&N clean
Raask
Raptor (see signature)

Title: Re: Idle problem.
Post by justin_o_guy2 on 10/09/11 at 14:24:20

What controls fuel>? The needle, What controls that? The slide,,Am I right thinking the problem is the slide dropping & falling past where it needs to be,, like maybe some vacuum needs to be maintained up there,,
You just letting go of the gas or are you closing it?

Title: Re: Idle problem.
Post by verslagen1 on 10/09/11 at 14:31:50

bleed holes tend to make the pilot richer.
How many turns out are you?

I'd put a fresh plug in run on idle only for a few minutes then pull it out and check.

You might try readjusting the idle mixture with a higher rpm setting.
and if that didn't work, try with a lower rpm setting.
there seems to be some leeway in how it's done as a number of people have the problem and most don't.

Title: Re: Idle problem.
Post by bill67 on 10/09/11 at 14:41:57

Tev is there to keep the engine running smooth at idle,And so engine doesn't kill.

Title: Re: Idle problem.
Post by Gyrobob on 10/09/11 at 15:06:08

6E6560603A3B0C0 wrote:

Tev is there to keep the engine running smooth at idle,And so engine doesn't kill.

What strange things you say/type/write/espouse. The TEV has little to do with idling, unless it is broken. It is there to richen the mixture during high rpm/closed throttle operation.

"And so the engine doesn't kill" What would the engine kill?

Title: Re: Idle problem.
Post by bill67 on 10/09/11 at 15:08:50

Are you saying the s40 only farts at high rpm not at shut of. ::) ::) ::)

Title: Re: Idle problem.
Post by Gyrobob on 10/09/11 at 16:24:58

2D26232379784F0 wrote:

Are you saying the s40 only farts at high rpm not at shut of. ::) ::) ::)

What strange things you say,..

Title: Re: Idle problem.
Post by arteacher on 10/09/11 at 16:33:37

150611100F0204060D52630 wrote:

2 turns out.
I tried adjusting idle at 1500 rpm, and at 1200 rpm-no diff.

Title: Re: Idle problem.
Post by Serowbot on 10/09/11 at 16:59:19

If it was fine before,... look for what changed.. intentionally or unintentionally...
Something has been affected and not restored...

Think details,... did you pull the tank,.. adjust anything else,... ?...

How long was it since you ran it?... could something have clogged in the interim?...

Title: Re: Idle problem.
Post by verslagen1 on 10/09/11 at 17:22:27

You gotta uncommon carb exhaust setup and I don't know where to go from here.

You have to get your a/f mixture checked at all rpm's. The only way I know is to get it dyno'd. Or buy a a/f meter for it.

Title: Re: Idle problem.
Post by arteacher on 10/10/11 at 04:45:54

786E79647C69647F0B0 wrote:

It was fine before I took the tev apart. I run it almost every day.
I never did find those spider legs though. ;D

Title: Re: Idle problem.
Post by arteacher on 10/10/11 at 15:27:28

Problem solved. As perhttp://suzukisavage.com/cgi-bin/YaBB.pl?num=1318209614 i put a washer in to increase the tension on the spring.