1.0l idle issues

[SuziCrazy]

I installed Godzuki's 1.0l in my SJ, runs pretty good for the exception that it has a hard time idling. I'm completly lost when it comes to carbs, I've been running EFI in all my other trucks to avoid this issue. What I'm looking for is tips or things to look for.... what could be the problem.....

[Depot]

Originally posted by SuziCrazy
what could be the problem.....

ummm.. lets start with the webwheeler u bought it from for starters! lol j/k

im no expert on carbs.. Id start by dumping some carb cleaner down its throat and lub the piss outta if.. make sure all springs are moving and give it a good running to clean any cobwebs out - then start tinkering..

when u say idling rough, how do u mean? is the idle set to low? is it cycling (reving high then lowthen high...) whats the exhaust smell like? rich or lean? any funny colours when u rev it up and down?

after yah clean and lub it, if u decide to tinker with any of the set screws only mess with one at a time and rememebr how many times u turn each one - that way when u royally **** it up u can always et it back :D

my 2 cents

D

[SuziCrazy]

Thanks for the info Depot, well it a really weird idle it kind of chugs back and forth not mch of high and low rev just chugs... when I'm driving it, it runs real nice just on idle. Smell... hummm considering it's got 10 year old gas in there, I can't really tell if it's running rich or not, but I'll assume it does run rich. I took it for a good run today to the OVO meeting brought it up to 130km on the highway and it started back firing (too much gas I guess) so I'm thinking anything stuck or loged in there it outta there now. I'll try carb cleaner and adjusting the screws and I'll make them for when I screw them up bad! :beer:

[Depot]

back firing eh? check ur timing - got a timing light? I dunno what the setting is suppsoed to be for those... anyone out there know?

that sounds to be ur culrpit... my timing was off on my 1.6 16 and she had wicked top end but zip for bottom end - got it back t factory specs and she purs nice all over the band.

put some good gas in her... disconect any timing advance gizmos (a vaccum solonoid/valve on the side of the distributor if u have it and plug off the hose) to get an accurate reading and time it when its warm.


gl

D

[gordZuki]

sometimes when u put the throttle cable back on it's off a tad ... had that happen to me with a few bikes ... also check timing like depot said ... i never got it up to 130 when i tested it but it did go nice at 90 ... one more thing do a vaccum check on it ... make sure it's not stealling to much air .... at low rpm's ...

[SuziCrazy]

Thanks guys I'll give that a try and see what I come up with

[Mudslug]

Check the following

Timing
Run some carb cleaner through it with GOOD gas
Vacuum leaks
base gasket

If its none of those there is one more thing but we do not want to discuss it...they know when you are talking about them and they fail just to piss you off...check the above and let me know...

[SuziCrazy]

lol thanks Mudslug! I'll try the above

[jimny1000]

As Mudslug and Depot said, try the carb cleaner and inspect for vaccum leaks. Check the brake booster hose too. Mine was leaking before since SJ410 never have brake booster and usually, vaccum source is rigged up on the intake manifold. (Mine was hooked up to the PVC valve).

I ran an inline fuel filter just before the carb since the jets in those carbs are so small that any dirt will clog them.

Timing should be at 10 degrees BTDC. Check that at the flywheel/transmission housing (driver side, where there is a rubber plug) since there is no mark on the crank pulley/timing cover to check for timing.

Hope you don't have to come to this part:
If you really have to disassemble the carb, be very careful on the top gasket. Try not to destroy it! That gasket is only available from the dealer as a rebuild kit, which cost about $85. The rebuild kit consists of....a few aluminum washers and that top gasket and the accelerator pump diaphram. :yike

To preset the idle mixture needle(the vertical screw that have a spring on it and may have a round cap), screw it in full and then unscrew it 2.5 turns. That is the initial setting.

Adjust idle mixture at around 800-900rpm with fully warmed up engine, good gas, timing set at 10 degrees with any idle accessories blocked off(distributor)and adjust idle mixture screw 1/8 turn at a time by either tightening(leaning) or loosening(richen), until you get a smooth idle, then tighten it 1/16 turn.
If you have a vaccum gauge, the proper setting is when you can get the highest smooth reading. Hope this helps! :)

I love that 1000cc engine, just a bit weak on the torque. But who needs torque when you have the rpms! It revs so freely that I can cruise all day at 5000rpm.


Just my 2 yens!

[TheSarg]

hummm considering it's got 10 year old gas in there

umm hello? is it just me or is this the first thing you should look at ?? i put a gerry can fulla gas in my garage and 3 weeks later its bad, you cant expect gas to last anymore, drain the tank, put fresh stuff in it B4 you screw with anything else!!!! If draining the tank is too much for ya, run down to yer local parts store and get 2 or 3 bottles of fuel treatment and run it through at a decent rpm.

my $0.02 cents, can i have change??

[Mudslug]

DUDE!!! man you shouldn't have discussed the Carb gasket...oh man now its going to fail.....SJ are nutty things and they know...oh yes they know

[SuziCrazy]

figured out my problem, I swapped out the old carb for another carb that I had.. swapped the fuel filter for a new one and realized the old one was all cloged up with rust particles... I swapped out the tank for another and "voila" fixed! :D

[Mudslug]

Cool so now take her up to 15000RPM and listen to the high pitch NA-NA-NA-NA-NA-NA-NA-NA-

They are the only motors in the world that make that sound...

Happiness is a 1.0L screaming so loud even guys with open header big blocks go "dude, thats a bit much eh?"

[Superzuk]

I bet it was the gas in the tank you changed... also the rust..

[jimny1000]

Funny that you mentioned swapping tanks.
When I took my test drive at the dealership where I brought my first zuk, it makes funny noises everytime I go around corners. It also comes with missing lugnuts.
Well, I guess you know what made the noise and what I found in the gas tank. :D

[SuziCrazy]

Geez! Started having problems again, driving on the highway going to pass a HUGE truck and my SJ boged out then starting stalling?!? .......I checked everything including the fuel filter just to be sure but everything seems to be clean.. swapped the fuel pump for another that I had and still nothing. I'm not getting fuel to the carb, I checked all the lines and they seem to hold pressure , not leaking or anything. I slapped on an aftermarket electric low pressure fuel pump, and sure enough it's running again. Now it idles fine with the choke off but as soon as I pull the choke, it chokes! it starts idling in sperts just like it's not getting enough fuel or maybe too much? Anyone else have ever had this problem? What is the rated pressure the stock pump pushes?

[Mudslug]

Stock pump pushes 3.55 to 4.97 Psi,

When you put the electric fuel pump on did you leave the return line in??

Also is it getting colder out that way now? I got a frozen carb a few times on mine because I didn't switch the air box over to "winter".

Hmm what else, when you had the carb off did you change the float level at all? These things have little teenie tiny float bowls and the smallest adjustment can throw them outta wack. Then again if the pump is wrong it can over or under power the bowl really easily

Let me know what ya find.

[Fullload]

Well maybe just a thought here. Usually when you have rust in the filter, there is a possibility that a small bit was in the other side of the line during the switch. Maybe a small bit worked it's way ( or was already on the inside of the steel line and worked it's way up and clogged the jet again???? Just stating the obvious. (P.S I hate carbs)

[SuziCrazy]

Thanks Fullload for stating the obvious and yes I did take the carb apart again (forgot to mention this) and it was clean.. runs mint just not with the choke on... I knew I should have slapped my spare 1.6 EFI in there! Never really played with carbs before, everytime I ran into a carb problem I swapped them out for EFI's