Chinese carburetors? Yet another 3Y thread
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Chinese carburetors? Yet another 3Y thread
Hi. Just wondering if many people have had success with a Chinese carburetor? Specifically for a 3Y petrol engine. I'm also having difficulties with my vacuum lines on the carburetor on my 3Y. All my altitude compensation, and emissions control has been removed over the years, now all I have is two lines from the block side of the carburetor, and one on a small diaphragm type looking thing (I read somewhere on this forum it's for a hot start and I'm not sure what that is).
If anybody has a good running 3Y engine with only a few vacuum lines and could post a few pictures of the lines I'd appreciate that heaps... Thanks
If anybody has a good running 3Y engine with only a few vacuum lines and could post a few pictures of the lines I'd appreciate that heaps... Thanks
I used to know everything. Now I know nothing
-
- LR 4WD Rear Locker
- Posts: 275
- Joined: Sat Jan 24, 2009 2:25 pm
- Town: Harkerville WC
- Vehicle: 1990 Hilux 4Y
- Real Name: Peter
Re: Chinese carburetors? Yet another 3Y thread
Hi Jez, got these from this forum some time ago. Can't recall who posted them, but credit goes to him. Don't know if they will help.
Cheers,
Peter
Cheers,
Peter
- Attachments
-
- 4Y Vacuum Hose Setup 1.pdf
- (22.46 KiB) Downloaded 320 times
- Mud Dog
- Moderator
- Posts: 29858
- Joined: Tue Apr 29, 2008 2:18 am
- Town: East London
- Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
- Real Name: Andy
- Club VHF Licence: HC103
Re: Chinese carburetors? Yet another 3Y thread
IIRC the 3Y used the same carb as the 4Y, just differently jetted. Same vacuum diagram should apply. The diagram above seems to be from a different spec vehicle than those we got here in RSA but not sure how yours compares.
Here is another one .....
Here is another one .....
When your road comes to an end ...... you need a HILUX!.
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
- Family_Dog
- Moderator
- Posts: 12698
- Joined: Tue May 22, 2007 10:09 am
- Town: Klerksdorp
- Vehicle: Hilux DC SFA, Hilux 2.7 DC, Hilux 2.7 SC, Prado 95 VX
- Real Name: Eric
- Club VHF Licence: HC101
- Location: Klerksdorp, NW
- Contact:
Re: Chinese carburetors? Yet another 3Y thread
Chinese jets tend to be very thirsty and require some modification (drilling and re-tapping) in order for the standard jets to be fitted. Any Carb specialist should be able to do this.
-F_D
-F_D
White Fang: 1999 2.7i DC Raider 4x4
Bull Dog: 1987 4Y-EFI 2.2 DC 4x4
Pra Dog: 1998 Prado VX 3.4
Hound Dog: 2000 2.7i SC 4x4
One Staffie, One Jack Russell, One Ring Neck Screecher, 17 Fish of questionable heritage
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Re: Chinese carburetors? Yet another 3Y thread
Thanks for the replies guys, very helpful!
That emissions control diagram is doing my head in! My truck's missing a lot of that stuff. It appears the the 4Y carb has a few more vacuum ports than the 3Y
Also, I've set my timing on the road (to detonate, then back a few degrees) When I put my timing light on it, it's showing up as 30 degrees BTDC, could this be because my harmonic balancer has shifted over the years? Surely it would detonate if it was 30 deg/BDTC.
Thanks all
That emissions control diagram is doing my head in! My truck's missing a lot of that stuff. It appears the the 4Y carb has a few more vacuum ports than the 3Y
Mud dog, where the hoses appear to join up and form one line, do they actually do that? I think I might try and hook everything up in that fashion. My distributors an arse and has two vacuum ports. I read somewhere on here that you can block the rear line off and it acts the same as a normal vac advance.Mud Dog wrote: ↑Mon Sep 25, 2017 3:22 pm IIRC the 3Y used the same carb as the 4Y, just differently jetted. Same vacuum diagram should apply. The diagram above seems to be from a different spec vehicle than those we got here in RSA but not sure how yours compares.
Here is another one .....
4Y VACUUM HOSE iNFO.jpg
Also, I've set my timing on the road (to detonate, then back a few degrees) When I put my timing light on it, it's showing up as 30 degrees BTDC, could this be because my harmonic balancer has shifted over the years? Surely it would detonate if it was 30 deg/BDTC.
Thanks all
I used to know everything. Now I know nothing
- Mud Dog
- Moderator
- Posts: 29858
- Joined: Tue Apr 29, 2008 2:18 am
- Town: East London
- Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
- Real Name: Andy
- Club VHF Licence: HC103
Re: Chinese carburetors? Yet another 3Y thread
The hoses don't form one line. There was a little branch manifold with three or four stacked tubes. IIRC my old 4Y dizzy had one port for the advance, but the 22R had two.
When your road comes to an end ...... you need a HILUX!.
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Re: Chinese carburetors? Yet another 3Y thread
Quick update; I got it running a lot better! I added an earth wire from the base of the carburetor to the head itself and she no longer dies when at idle under load (braking, with the lights on at night). I figured that the bolts through the manifold would be enough, but apparently not. May have something to do with my home made intake gasket!
I used to know everything. Now I know nothing
- Mud Dog
- Moderator
- Posts: 29858
- Joined: Tue Apr 29, 2008 2:18 am
- Town: East London
- Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
- Real Name: Andy
- Club VHF Licence: HC103
Re: Chinese carburetors? Yet another 3Y thread
Yep, that earth is important - the idle solenoid valve and the choke both depend on it, but one doesn't always think of it when troubleshooting. One tends to think that the bolts are adequate but with a little corrosion in the aluminium thread of the manifold can lead to problems as you have been experiencing. Glad to hear that it's running better.
When your road comes to an end ...... you need a HILUX!.
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
- pietpetoors
- Moderator
- Posts: 10650
- Joined: Thu May 17, 2007 9:12 pm
- Town: Langebaan
- Vehicle: 2.7 Hilux 4x4 DC
- Real Name: Pieter
- Club VHF Licence: X27
- Contact:
Re: Chinese carburetors? Yet another 3Y thread
Insn't it easier to braze the jet and redrill to smaller size? ie same size as OEM jet?Chinese jets tend to be very thirsty and require some modification (drilling and re-tapping) in order for the standard jets to be fitted. Any Carb specialist should be able to do this.
Only Dead Fish Go With The Flow!
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
1999 Hilux 2.7i 4x4 Raider DC with 3.4 Prado V6. Rear diff-lock, Bull Bar and rock sliders, 31" Cooper ST Maxx, Snorkel, Alu-Canopy, VHF Motorolla radio, West Coast Rust, Mikem Suspension, Ball Joint Spacers in front and Mikem extended shackles at the rear, 25watt LED Spots
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Re: Chinese carburetors? Yet another 3Y thread
Thanks Muddog, it's been quite a mission. New plugs, leads, rotor and cap. Reconditioned carb, intake gasket gooed up with RTV, new voltage regulator and battery. She should be good for another 100,000 clicks. Has a bit of a tap to her in the top end but I'm pretty confident the 3Ys are bulletproof. Now to do some saving up so I can buy myself a beach/bush hack. An old 3y surf, or even a 2.4 turbo is on the cards.. Never enough money around ! :-)
I used to know everything. Now I know nothing
- Family_Dog
- Moderator
- Posts: 12698
- Joined: Tue May 22, 2007 10:09 am
- Town: Klerksdorp
- Vehicle: Hilux DC SFA, Hilux 2.7 DC, Hilux 2.7 SC, Prado 95 VX
- Real Name: Eric
- Club VHF Licence: HC101
- Location: Klerksdorp, NW
- Contact:
Re: Chinese carburetors? Yet another 3Y thread
The carb boys do something like this, drill out or braze the old thread and tap a new thread. The Chinese threads do not match the threads on the locally available jets.pietpetoors wrote: ↑Thu Oct 05, 2017 8:33 amInsn't it easier to braze the jet and redrill to smaller size? ie same size as OEM jet?Chinese jets tend to be very thirsty and require some modification (drilling and re-tapping) in order for the standard jets to be fitted. Any Carb specialist should be able to do this.
-F_D
White Fang: 1999 2.7i DC Raider 4x4
Bull Dog: 1987 4Y-EFI 2.2 DC 4x4
Pra Dog: 1998 Prado VX 3.4
Hound Dog: 2000 2.7i SC 4x4
One Staffie, One Jack Russell, One Ring Neck Screecher, 17 Fish of questionable heritage
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Re: Chinese carburetors? Yet another 3Y thread
Looks like I might be trying that Chinese carburetor business out after all. I thought I'd located the idle issue by regrounding the carb for the (idle?) solenoid. It seemed to make a difference, now it's back to its same old tricks. Maybe the idle solenoids burnt out? I'll pop the solenoid out tomorrow & test the bastard thing.
Other than that I don't know where else to start/keep looking.
Other than that I don't know where else to start/keep looking.
I used to know everything. Now I know nothing
- Mud Dog
- Moderator
- Posts: 29858
- Joined: Tue Apr 29, 2008 2:18 am
- Town: East London
- Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
- Real Name: Andy
- Club VHF Licence: HC103
Re: Chinese carburetors? Yet another 3Y thread
I vaguely recall a thread from a good few years back where someone was having idle solenoid issues but the solenoid valve was working. Now if I recall correctly he traced it back to a relay behind the dash but I'm under the impression that the switching is triggered by a vacuum switch. Long time since I had my 4y, so it's all a bit fuzzy.
When your road comes to an end ...... you need a HILUX!.
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
Life is like a jar of Jalapeño peppers ... what you do today, might burn your ass tomorrow.
Don't take life too seriously ..... no-one gets out alive.
It's not about waiting for storms to pass. It's about learning to dance in the rain.
And be yourself ..... everyone else is taken!
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Re: Chinese carburetors? Yet another 3Y thread
I've found via my multimeter that the solenoid with the pin has power all the time. seems to be working okay on a bench test. A weber carburetor or an EFI setup is looking more & more tempting. I can get a 3Y-E motor complete running from a surf with the EFI computer. I'm not sure how the fuel pump's set up on those, would one have to change the lift pump inside the tank too? Just throwing ideas around at this stage..
I used to know everything. Now I know nothing
-
- LR4WD, Lockers, Crawler Gears
- Posts: 1484
- Joined: Mon May 07, 2012 12:33 pm
- Town: Pretoria
- Vehicle: Toyota Hilux Dakar 2.8 GD-6 DC 4X4
- Real Name: Marnus
- Location: Pretoria Oos
- Contact:
Re: Chinese carburetors? Yet another 3Y thread
It is very unlikely that you would need to replace the lift pump too. Just make sure that you have a fuel pump that delivers sufficient pressure for the injection rail.
- NZ_N57R
- High Range 2WD
- Posts: 19
- Joined: Mon Sep 25, 2017 7:51 am
- Town: Kerikeri New Zealand
- Vehicle: YN57R
- Real Name: Jez
- Location: New Zealand
Re: Chinese carburetors? Yet another 3Y thread
*Quick update*
After reading Muddogs comment about the solenoid relay playing up I decided to do more digging.. Turns out that little box was only sending out voltage when it was cold .. Or something.....
Anyway, I hardwired the anti-dieseling solenoid (the one on the rear of the carburetor, half way down, closest to the firewall) straight to ACC on the ignition, and to my ground I made up from the carburetor to the block.
Initial testing showing a drastic improvement of engine performance at idle. I have yet to take it for a long drive and tune her idle speed while warm (manual choke keeps the revs up when she's cold).
I hope this new information can help someone else, I assume this is a pretty common issue, not the first Y series motor that's done this to me... But it is the first one I've fixed! (maybe, sort of.. )
After reading Muddogs comment about the solenoid relay playing up I decided to do more digging.. Turns out that little box was only sending out voltage when it was cold .. Or something.....
Anyway, I hardwired the anti-dieseling solenoid (the one on the rear of the carburetor, half way down, closest to the firewall) straight to ACC on the ignition, and to my ground I made up from the carburetor to the block.
Initial testing showing a drastic improvement of engine performance at idle. I have yet to take it for a long drive and tune her idle speed while warm (manual choke keeps the revs up when she's cold).
I hope this new information can help someone else, I assume this is a pretty common issue, not the first Y series motor that's done this to me... But it is the first one I've fixed! (maybe, sort of.. )
I used to know everything. Now I know nothing