|
Post by saqib777 on Oct 1, 2013 5:21:43 GMT -5
|
|
|
Post by saqib777 on Oct 5, 2013 9:37:44 GMT -5
No Luv for EF10???
|
|
|
Post by santaclaw on Oct 14, 2013 1:08:40 GMT -5
I can tell you that from memory, the carb looks identical to mine. I can take pics of it, today.
|
|
|
Post by santaclaw on Oct 14, 2013 9:44:35 GMT -5
Bad pics, but I was in a hurry... I will take more pics tomorrow when it's daylight. Hopefully the last pic will help you some.
|
|
|
Post by hashim5003 on Oct 15, 2013 13:55:32 GMT -5
I cannot see anything missing in your carb. it's in a pretty good condition than me. it would be more helpful if you can identify on picture that which thing are you asking.
|
|
|
Post by saqib777 on Oct 16, 2013 2:59:31 GMT -5
@hashim, Here's little comparison for the power valve / duty solenoid. I just want to confirm if the model on my justy even had this thing in the first place. Plus, if there isn't any jet missing...
|
|
|
Post by saqib777 on Oct 16, 2013 3:03:48 GMT -5
Note: All 3 are different hitachi models. A = EF10 B = EA82 C = EF12
|
|
|
Post by hashim5003 on Oct 16, 2013 10:15:44 GMT -5
There is no duty solenoid in EF10 carb. All jets present in your carb. Do you have little ball in carburetor accelerator pump?
|
|
|
Post by saqib777 on Oct 17, 2013 1:55:38 GMT -5
Yes, the ball is present and fuel pump works normally. It's just the idle... Car dies if venturi is fully closed. There's still too much fuel going in the engine with no throttle. So the car dies unless there's a bit of throttle. Also, the black smoke and fuel smell, both are significantly high at idle. The air fuel mixture is also having no effect with this condition. All the way out or all the way in... Same result! Need to identify the reason, why is there so much fuel going in. The float level is absolutely fine. Plus the car runs good otherwise. Just the idle driving me crazy...
|
|
|
Post by madmatt on Oct 17, 2013 8:58:17 GMT -5
Bad pics, but I was in a hurry... .... THAT is the CLEANEST Justy engine bay I have ever seen! SAWEET!
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 17, 2013 15:18:45 GMT -5
Yes, the ball is present and fuel pump works normally. It's just the idle... Car dies if venturi is fully closed. There's still too much fuel going in the engine with no throttle. So the car dies unless there's a bit of throttle. Also, the black smoke and fuel smell, both are significantly high at idle. The air fuel mixture is also having no effect with this condition. All the way out or all the way in... Same result! Need to identify the reason, why is there so much fuel going in. The float level is absolutely fine. Plus the car runs good otherwise. Just the idle driving me crazy... It sounds like you are by-passing the idle circuit and running on the secondary or the idle circuit is clogged, so it only runs using the secondary. You may have to back-off the air-fuel mixture screw, but it's more likely that the idle circuit is clogged so the A-F mixture screw is turned in too far just to get it to run.
|
|
|
Post by saqib777 on Oct 18, 2013 2:18:53 GMT -5
Yes, the ball is present and fuel pump works normally. It's just the idle... Car dies if venturi is fully closed. There's still too much fuel going in the engine with no throttle. So the car dies unless there's a bit of throttle. Also, the black smoke and fuel smell, both are significantly high at idle. The air fuel mixture is also having no effect with this condition. All the way out or all the way in... Same result! Need to identify the reason, why is there so much fuel going in. The float level is absolutely fine. Plus the car runs good otherwise. Just the idle driving me crazy... It sounds like you are by-passing the idle circuit and running on the secondary or the idle circuit is clogged, so it only runs using the secondary. You may have to back-off the air-fuel mixture screw, but it's more likely that the idle circuit is clogged so the A-F mixture screw is turned in too far just to get it to run. Thanks ferox: From what I've seen, fuel is creeping in the primary. I'm not sure if secondary has any involvement. Earlier, I did perform a cleaning of all jets. Carb is pretty clean now. It was all black inside when I opened it the first time Air-fuel mixture has no effect whether all in or all out. Currently it's barely hanging in with a couple of threads. Considering that we have a clogged idle circuit, what could be the reason of excess fuel in the primary? I mean, if we're forcing the car to stay alive on the primary with a bit of throttle, then still excess black smoking fuel shouldn't be there. Seeking your words of advice. Thanks.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Oct 19, 2013 15:01:31 GMT -5
It sounds like you are by-passing the idle circuit and running on the secondary or the idle circuit is clogged, so it only runs using the secondary. You may have to back-off the air-fuel mixture screw, but it's more likely that the idle circuit is clogged so the A-F mixture screw is turned in too far just to get it to run. Thanks ferox: From what I've seen, fuel is creeping in the primary. I'm not sure if secondary has any involvement. Earlier, I did perform a cleaning of all jets. Carb is pretty clean now. It was all black inside when I opened it the first time Air-fuel mixture has no effect whether all in or all out. Currently it's barely hanging in with a couple of threads. Considering that we have a clogged idle circuit, what could be the reason of excess fuel in the primary? I mean, if we're forcing the car to stay alive on the primary with a bit of throttle, then still excess black smoking fuel shouldn't be there. Seeking your words of advice. Thanks. So does the idle mixture screw have no effect or the air-fuel mixture screw have no effect? Typically, it's the idle mixture screw that has no effect because the idle circuit is the main circuit that is used so it gets clogged preferentially. Cleaning the jets in this situation is just window dressing. The clogs are in the passageways of the circuit. You need solvent and compressed air to really clean them. If you are forcing the car to stay running by opening the throttle, then it does not seem like the A-F screw is the one that is not responsive. If it really is the A-F screw that has no effect, then you aren't getting any venturi effect. That could be clogging or a lack of a good seal in various parts of the carb. But if this were the case then giving it throttle would not do much either unless it was using the secondary. Often when the idle circuit gets clogged on a carb, instead of cleaning it like they should, people start fiddling with it a eventually get it to run by turning screws until it is running without the idle circuit. Typically this results in a rich running condition such as you have described. When you see fuel trickling in, is it coming from the venturi in the top of the bell or from the base of the carb where the idle mixture screw is? Regardless of where the problem is, you need to clean and reseal the entire carb and return the settings back to spec. The power valve can also leak fuel into the manifold if it's not sealed well[if you have one]. You've either got a clogging problem or o-ring problem or both. Remember, the jets are really just orifice restrictors to meter fuel. The passageways they connect to are not much larger than the jet opening by necessity to move fuel through the carb at the proper velocity, but they are a lot longer and have bends in them. Make sure you remove the idle mixture screw completely while you are cleaning. Edit: Looking back through your pictures I see two vacuum ports under the idle mixture screw, but only one has a nipple and it looks like you only have one vacuum hose going there, but I can't tell for sure. If that second port is open then it would partially short-circuit your vacuum signal and could cause similar issues to what you are experiencing. It also looks like there isn't a power valve or plunger. I can't see the bowl well enough, but for some reason your carb is made to take a power valve system, but doesn't have one (?). The plunger is usually staked in. Did your carb show any signs of having these? Is the power valve area also blocked off? Also make sure your idle cut off solenoid is functioning.
|
|
|
Post by omandi4 on Oct 20, 2013 5:45:37 GMT -5
need to know that number has the main jet that is in the photo is dated 29/09/2013 14: 24 (red square)
|
|
|
Post by omandi4 on Oct 20, 2013 6:01:48 GMT -5
anyone know that this device meets function and where I can find information about it?
|
|
|
Post by saqib777 on Oct 20, 2013 7:56:42 GMT -5
@ferox: Thanks for the detailed reply. Let me state the responses in sequence. 1. Now I'm really confused between the terms "Idle Mixture Screw" & "Air-Fuel Mixture Screw". Just for the clarification, I have been referring to the screw at the back of the carb, I think angled at 45 degrees With a bit of throttle, the engine smooths out but still has black smoke. 2. I did try my best to clear all passages but didn't have any air compressor so skipped that. Maybe the carb needs another round of cleaning. It's just that the gaskets are a tedious work. I had made them out of thick paper sheet 3. It's not very clear, where exactly is fuel coming in to the barrel. I'll need to take a closer look again and will let you know on this. 4. About the power valve, well it didn't have any such valve or solenoid valve. That was my prime query whether it's missing the valve of this particular model didn't come with any valves. hashim5003 has confirmed that this model doesn't have any power valve, and I'm not missing any jets as well. 5. About the nipple at the back of the carb, yes there's only one vacuum line. I thought the other might have been broken, but it doesn't have any vacuum to it. I did plug it with a screw anyway 6. There's just 1 electrical connection on the carb, and that is the anti-dieseling switch. Other than that, no solenoids, valves or plungers. I'm worried now. santaclaw has the exact same carb model but opening up a working carb is definitely but risky.
|
|
|
Post by saqib777 on Oct 20, 2013 7:58:02 GMT -5
need to know that number has the main jet that is in the photo is dated 29/09/2013 14: 24 (red square) View AttachmentSorry, I didn't take note of the numbers but will do if/when I reopen the carb.
|
|
|
Post by saqib777 on Oct 20, 2013 8:15:04 GMT -5
anyone know that this device meets function and where I can find information about it? Here're a few pix I took when I also tried to understand it's exact functionality but ended up cleaning, painting & fitting it back with not much of understanding It makes a weird wining sound if the line to the little dashpot at carb's front is removed with the intake manifold line still intact.
|
|
|
Post by saqib777 on Oct 20, 2013 8:22:02 GMT -5
@ferox: Another find is that if I block the air from the top using my hands, the engine struggles and dies immediately.
|
|
|
Post by omandi4 on Oct 20, 2013 13:37:07 GMT -5
anyone know that this device meets function and where I can find information about it? Here're a few pix I took when I also tried to understand it's exact functionality but ended up cleaning, painting & fitting it back with not much of understanding It makes a weird wining sound if the line to the little dashpot at carb's front is removed with the intake manifold line still intact.
|
|