Offroad-Express

hey guys my sj413 wont idol when its cold it doesnt have a manual choke its weird because it idols for like one second when i turn it over then it stalls and then i have to turn it over and rev it up to like 2000rpm for a while and then it will run and it has the same promblem just randomly just wondering if you guys had any ideas??

jervisad wrote: just wondering if you guys had any ideas??

yep sounds like carb rebuild time, need to find out if the choke isnt hooked up or if its an auto choke and if its working properly or not, if it dosent idle properly when its warm you probably want to have a play with the idle mixture screw, wind it in till the engine just starts to falter then wind it back half a turn or so untill it runs smooth, need to do that in tandem with the idle speed screw to get it idleing at the right speed. Probably want to give the carb a good soak and clean and blow all the galleries out with compressed air and throw a new kit in it before you try doing any tuning or playing on it

sweet as man yeah it idols when its warm but then some times it will just stall randomly only when im stopped tho how much to rebuild the carb?

First you need to find out what carb you have, swift ones have an auto choke, whereas 413 ones are manual cable choke, I wouldn't bother pulling it apart if it runs fine when warm, just sort the choke out and it should be sweet.

sweet yeah im not quite shore which carb it is because it has a vitara 1600 8valve engine witch was in it when i got it but yeah ill try sort tho choke out on it thanks for the help guys

I see, can you get some pics of it, will be able to tell what sort of carb it is then.

watch out, a carb rebuild might not fix it. i have had trouble with samurai carbs (dont know about 1600 carbs but presume they are similar) with the exatc symptom you a describing. what it turned out to be was that the shaft where the butterfly valve is wears out the carb casing causing a gap where the carb sucks air, this is why it will only run sweet at high revs where enough air is being rushed through. pull the carb off and wiggle the butterfly valve shaft, if it has any play in it the carb is as god as stuffed. i had to replace mine

and while your doing that change your fuel filter (s).

umm my brothers an auto electrician and he seemed to think it might be a dodgy coil pack so hes gonna get a new one to try on it. and i have pulled the carb apart and it looked sweet but yeah i will look at the butterflies cheers and sorry i cant take any photos cause i dont have a camera at the moment

my brother thinks it might be that because thats a common problem with the coil i have (bosch gt40) so we gonna try that and see

Interesting, let us know how you get on.

sweet as man cheers oh and i checked my fuel filters there good they look like new

If it runs sweet when warm it is unlikely to be an ignition system fault .

does the carb have water hoses to and from the intake manifold ?
The auto choke version of these carbs use coolant fluid temperature to operate a wax element that operates the choke .
They are well knowen to block up with crud meaning the choke does not close up for cold starting .

vaccumm or an air leak is the other Likly cuprit , as BlakeJ said the butterfly shaft or one of the vaccumm lines is losse or the seal between the carb and manifold is sucking in air . test for leaks with the engine running and selectively spray engine starter around the carb . a leak will show up as an increase in revs .

sweet i will try that also but yeah we just gonna try the coil pack because he can a new one for free that i can try cause yeah im only sixteen and dont have shit all money so were gonna try the cheapest stuff first

hey guys i got the new coil and whacked it on now she runs like a dream! stoked as. i am going 4 wheeling on thursday so shall see how it performs