idling dramas.... help?

[stumped]

so almost 2yrs ago i rolled my zook, and it's been sitting under a tarp for a lot of that time, getting started occasionally. it's finally got to the stage where it can drive it on the road, but i'm having dramas...

first off, the engine would lose power and eventually stall while driving along the road. got a carby rebuild kit and cleaned heaps of crap outta the fuel bowl and now she runs fine while driving...

but still not idling! i've been thru all the carby tech i could find, have checked fuel cut off solenoid, PCV valve, cleared out the EGS, everything else was cleaned when we rebuilt the carby. vacuum hoses have been replaced, gaskets have goo on them, checked inlet manifold for leaks. timing is good. new spark plugs, leads seem to be good.

will idle really high, like 2K or so, but still seems to be missing and running very rough at idle. much lower than that and it'll miss badly and die.

any ideas?? we've spent two saturdays on it so far, and it's still playing up! starting to wonder 'bout dizzy cap/rotor, possibly coil... that's next saturday

[nicbeer]

i take it u cleaned out the jets?

Did u clean the fuel tank out as well or the filters as they may have been crap in there and gone through to the jets again since the rebuild?

feel ok driving? for power and that.

Btw: we need new pics of the breast.

Nic

[suzuki boy]

Yeah i want to see picks of the breast!

Try taking the air cleaner off the top of the carby and rev it and put your hand over the top of the carby! Your hand will be covered in crap and that cleaning the jets i think!

Works for my troubles! Most the time.

[want33s]

It might also be a vacuum leak through the brake boster. to check, remove hose from booster and plug it up.. Sometimes the diaphram splits.

[JrZook]

Have you replaced the fuel pump?? How old is it? Do you have a filter inbetween the pump and the carb? What rebuild kit did you use on it, cause a few kits are very rough and the black fibreous gasket they supply for the top of the jet/emulsion tube start to deteroiate straight away blocking the holes in the emulsion tube which is part of the idle circuit. My advise would be to recheck all your vac hoses, then pull the carb apart once again, focusing mainly on the pin holes in the jet/emulsion tube of the primary throat. This needs to be extreemly clean to work properly, and if the gasket for it looks sus ie fibers poking out replace it by making one out of a cornflakes box (these work well).

Hope it helps cheers Dan

[stumped]

i take it u cleaned out the jets?

Did u clean the fuel tank out as well or the filters as they may have been crap in there and gone through to the jets again since the rebuild?

feel ok driving? for power and that.

Btw: we need new pics of the breast.

Nic

it drives fine, power is good for a sierra on 31s haven't cleaned the tank, but i've got two filters and the filter's clean... jets were cleaned when we rebuilt it...

i don't think you want pics of my breasts, but i'll put pics of the zook up in a while, prolly once i've got the soft top sorted - atm it's still under a tarp

[stumped]

It might also be a vacuum leak through the brake boster. to check, remove hose from booster and plug it up.. Sometimes the diaphram splits.

haven't checked that yet i don't think, will have a look on saturday

[stumped]

Have you replaced the fuel pump?? How old is it? Do you have a filter inbetween the pump and the carb? What rebuild kit did you use on it, cause a few kits are very rough and the black fibreous gasket they supply for the top of the jet/emulsion tube start to deteroiate straight away blocking the holes in the emulsion tube which is part of the idle circuit. My advise would be to recheck all your vac hoses, then pull the carb apart once again, focusing mainly on the pin holes in the jet/emulsion tube of the primary throat. This needs to be extreemly clean to work properly, and if the gasket for it looks sus ie fibers poking out replace it by making one out of a cornflakes box (these work well).

Hope it helps cheers Dan

nah, haven't replaced the fuel pump but have got a filter between it and the carby. it's old, maybe as old as the car, dunno. rebuild kit was the one from auto one, no idea of brand. the gasket seems alright, and we've got goo all around to get a good seal.

vac hoses were replaced yesterday, so they're all good. might pull the carby apart once more, but i'm pretty sure the jets are good... will see how we go

[lay80n]

When are you next in Newy Steve?? Give me a call and we can organise a tune up day. Whats the timing like, have you checked it?? Have you drained the tank and fueled it up with new fuel of fuel. Call me if you got any questions dude.

Layto....

[stumped]

When are you next in Newy Steve?? Give me a call and we can organise a tune up day. Whats the timing like, have you checked it?? Have you drained the tank and fueled it up with new fuel of fuel. Call me if you got any questions dude.

Layto....

i'll be in newy this weekend, but the zook won't be - it's not really that drivable...
timing's good, did it with a gun and all. it was virtually empty and i filled it with good fuel, so that's all good i think - got the two filters too, and the one near the carby's clean as. had a mechanic mate working on it the last two saturdays... so it's not just me
lemme know if you've got any more ideas! might give ya a call on saturday when we're working on it....




thanks for all the help guys, that's awesome! if anyone's got any other ideas, bring them on! won't be on a computer til friday, but any help is good!

[CWBYUP]

What about water in the tank ?

Good luck with it champ

[JrZook]

nah, haven't replaced the fuel pump but have got a filter between it and the carby. it's old, maybe as old as the car, dunno. rebuild kit was the one from auto one, no idea of brand. the gasket seems alright, and we've got goo all around to get a good seal.

vac hoses were replaced yesterday, so they're all good. might pull the carby apart once more, but i'm pretty sure the jets are good... will see how we go

Oh what sort of goo did u use??? Slastics and sealers shouldnt be used in carbs where they are exposed to fuel. They always deteroite and the small particles find there way thru every little passage. I think you might have to strrip it down again. As said b4 try making a gasket for the e-tubes out of a corn flake box they work good as, no need for sealers in the carb they cause trouble.
Hope ya sort it out
Cheers Dan

[petah from oz]

Try bleeding out the air lock in the top water hose on the carby, the auto choke plays up if its not bled out. Had this same problem in my sons carby.

[christover1]

Try bleeding out the air lock in the top water hose on the carby, the auto choke plays up if its not bled out. Had this same problem in my sons carby.

I agree, sounds auto choke related.
Also.
The linkages and bits on the side that are a function of choke can seize up.

christover

[lay80n]

Steve, i have a day to kill in sydney this friday while i get some warranty work done on my bike. If you want to pick me up i can probably sort it for you.

Layto....

[CWBYUP]

What do you charge if I need if i need help ???

Nick

[stumped]

Try bleeding out the air lock in the top water hose on the carby, the auto choke plays up if its not bled out. Had this same problem in my sons carby.

I agree, sounds auto choke related.
Also.
The linkages and bits on the side that are a function of choke can seize up.

christover

playing with it atm, it actually idles when it's cold, but as soon as she's warmed up the missing/stalling happens again.... so we don't think it's choke related. correct?


CWBYUP - i don't think it's water, it had almost a full tank of new fuel, and two filters before the carby


layto - unfortunately i was on camp, so i only saw ur post today. would love to get ur help, but dunno when i'm gonna be anywhere near newy

[JrZook]

Try bleeding out the air lock in the top water hose on the carby, the auto choke plays up if its not bled out. Had this same problem in my sons carby.

I agree, sounds auto choke related.
Also.
The linkages and bits on the side that are a function of choke can seize up.

christover

playing with it atm, it actually idles when it's cold, but as soon as she's warmed up the missing/stalling happens again.... so we don't think it's choke related. correct?


CWBYUP - i don't think it's water, it had almost a full tank of new fuel, and two filters before the carby


layto - unfortunately i was on camp, so i only saw ur post today. would love to get ur help, but dunno when i'm gonna be anywhere near newy

Well when the engine is warm the choke flap should be totally open. To be sure that it is carby related take the hat off the carb when the engine is warm and manually close the choke flap slowly at the revs the engine is stumbling at. If the revs pick up when the choke flap is slightly close it indicates that the engine is running lean, thus a blockage in the carb.

[stumped]

Well when the engine is warm the choke flap should be totally open. To be sure that it is carby related take the hat off the carb when the engine is warm and manually close the choke flap slowly at the revs the engine is stumbling at. If the revs pick up when the choke flap is slightly close it indicates that the engine is running lean, thus a blockage in the carb.

yeah, it wasn't that, we'd been playing with the carby for aaaaaaages, definitely not a choke flap problem

think we've got a fix now, tho somewhat dodgy... got a cheap parts carby from suzisport to try swapping a few bits, ended up putting it on to see how it went. after swapping a few things in and out (like the fuel cut off solenoid) it's now idling and runs fine... only drama is that it sticks when my foot's to the floor for a while - only really a drama going up hills at this stage, cos i won't be doing much wheeling til i get a cage...

the donor carby is apparently off a 1L swift - the internals are identical and it bolts straight on, just has a few different doodads hanging off it.

i'm sure you'll hear from me if it plays up thanks for the help!

[lay80n]

Try bleeding out the air lock in the top water hose on the carby, the auto choke plays up if its not bled out. Had this same problem in my sons carby.

I agree, sounds auto choke related.
Also.
The linkages and bits on the side that are a function of choke can seize up.

christover

playing with it atm, it actually idles when it's cold, but as soon as she's warmed up the missing/stalling happens again.... so we don't think it's choke related. correct?


CWBYUP - i don't think it's water, it had almost a full tank of new fuel, and two filters before the carby


layto - unfortunately i was on camp, so i only saw ur post today. would love to get ur help, but dunno when i'm gonna be anywhere near newy

Bugger hey. I had a day to kill in Caringbah :(
When you are up this way again, give me a yell and i will sort you out.

Layto....

[Libber]

I had this exact problem this weekend.
Using the instructions on this post, I took the carby apart and cleaned it (several times).
On the last attempt I fould a LITTLE bit of crud stuck in the end of the idle jet. It had exactly the same symptoms, like idling when cold but stalling once warmed, regardless of choke position.
It works fine again, only I have to work out what I have done wrong - the revs pick up when I pump the brake. I must have put a vaccum hose on wrong? It does it regardless of vaccum advance being connected or not on the dizzy. Any ideas?

[lay80n]

I had this exact problem this weekend.
Using the instructions on this post, I took the carby apart and cleaned it (several times).
On the last attempt I fould a LITTLE bit of crud stuck in the end of the idle jet. It had exactly the same symptoms, like idling when cold but stalling once warmed, regardless of choke position.
It works fine again, only I have to work out what I have done wrong - the revs pick up when I pump the brake. I must have put a vaccum hose on wrong? It does it regardless of vaccum advance being connected or not on the dizzy. Any ideas?

Check your vacum booster and connections.

Layto....

[JrZook]

I had this exact problem this weekend.
Using the instructions on this post, I took the carby apart and cleaned it (several times).
On the last attempt I fould a LITTLE bit of crud stuck in the end of the idle jet. It had exactly the same symptoms, like idling when cold but stalling once warmed, regardless of choke position.
It works fine again, only I have to work out what I have done wrong - the revs pick up when I pump the brake. I must have put a vaccum hose on wrong? It does it regardless of vaccum advance being connected or not on the dizzy. Any ideas?

Check your vacum booster and connections.

Layto....

How fast are you pumping the brake?. Id say this is normal because if you pump the brake fast enough you are pumping air out of the booster bak into the intake manifold.

[lay80n]

I had this exact problem this weekend.
Using the instructions on this post, I took the carby apart and cleaned it (several times).
On the last attempt I fould a LITTLE bit of crud stuck in the end of the idle jet. It had exactly the same symptoms, like idling when cold but stalling once warmed, regardless of choke position.
It works fine again, only I have to work out what I have done wrong - the revs pick up when I pump the brake. I must have put a vaccum hose on wrong? It does it regardless of vaccum advance being connected or not on the dizzy. Any ideas?

Check your vacum booster and connections.

Layto....

How fast are you pumping the brake?. Id say this is normal because if you pump the brake fast enough you are pumping air out of the booster bak into the intake manifold.

My bad, i read it as when i put my foot on the brake . Yeah if you are pumping the pedal fairly fast then the revs will pick up. Cheers JrZook.

Layto....