WikiWirral Wirral's Biggest Online Forum
Forum Statistics
Posts1,005,780
Topics74,424
Members12,674
Forums66
Posts in last 24hrs40
Most Online7,831
Apr 8th, 2013
Who's Online Now
53 registered members (4436789, 10 invisible), 977 guests, and279 spiders.
Key: Admin, Global Mod, Mod
Social Media : Follow Us


Popular Topics(Views 7days)
New General Forums
Hi
by The2Veggies. 12th Jul 2018 8:07pm
Men for all seasons
by casper. 11th Jul 2018 10:32am
Delta 15 Scholarship
by diggingdeeper. 2nd Jul 2018 6:23pm
Trump separating children from parents.
by venice. 20th Jun 2018 12:27pm
New Wirral History
Info on Pilgrim Street, Birkenhead
by Tom_Chisholm. 21st Jul 2018 4:02pm
A Fizz From The Past
by diggingdeeper. 30th Jun 2018 8:49pm
Ashville Road Sports Ground
by derekdwc. 26th May 2018 1:14pm
Any pics of Bentinck Street
by derekdwc. 17th Oct 2012 11:25am
276 Rock Villa Hotel Ltd 329 Old Chester Road
by derekdwc. 18th Aug 2011 11:13pm
Forum Tips
Photo Gallery Forums
Over Exposed Crash Site
Birkenhead Priory / Laird's crane today
Topic Replies
10 channels removed from virgin tv
by assassin. 21st Jul 2018 8:33pm
Info on Pilgrim Street, Birkenhead
by locomotive. 21st Jul 2018 8:27pm
New Novichok Saga
by fish5133. 21st Jul 2018 12:47pm
Kitchen Supplier & Fitter + other Recommendations
by muzzy2. 21st Jul 2018 8:38am
Newsflash - Wirral's newest Retail Park
by Excoriator. 20th Jul 2018 10:42am
Hose Pipe Ban
by diggingdeeper. 19th Jul 2018 9:42pm
Finds from 18/07/18 double silver!
by Detecting_wirral. 19th Jul 2018 9:30pm
Ashville Road Sports Ground
by jimmy3. 19th Jul 2018 2:06pm
124 North Western Hotel
by diggingdeeper. 19th Jul 2018 12:00pm
July
M T W T F S S
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30 31
Recent Posts : What's On ?
Giants to visit New Brighton Lighthouse
by granny. 24th Jun 2018 10:43pm
Previous Topic
Next Topic
Print Topic
Rate Topic
Carburettor rebuilds? #839913
27th Nov 2013 1:41pm
27th Nov 2013 1:41pm
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
D
DavidB Offline OP
Wiki Guide
DavidB  Offline OP
Wiki Guide
D
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
Does anyone know of any experts on the Wirral that can do decent rebuilds on carburettors?

I have an old Subaru which has a carb - the carbs on these are reknowned for their awfulness, and would like to get it rebuilt.
It has been rough and getting worse. It's completely drivable, but the revs are 2,000rpm - 3,000rpm, and I can't cure it, even after taking the carb to bits, cleaning it and putting it back together again. The jets look fine.
The car is taxed/MOT'd and can be driven to the garage etc.


"C20 LET bang"
Google Ads
Re: Carburettor rebuilds? [Re: DavidB] #840055
27th Nov 2013 10:54pm
27th Nov 2013 10:54pm
Joined: Jan 2013
Posts: 196
Wirral
S
s7uajones Offline
Enthusiast
s7uajones  Offline
Enthusiast
S
Joined: Jan 2013
Posts: 196
Wirral
Hi there carb experts are hard to find these days
However I have some experience from my vauxhalll nova days

A carb works on air and fuel, open the throttle and more air is pulled in and sucks fuel with it. ,,, so you could have an air leak on the base of the carb or on the inlet manifold.
Take some wd40 and spray it around those areas and if the engine note changes thefts the problem
Hope this helps
Stu
Let me know how you get on

Re: Carburettor rebuilds? [Re: DavidB] #840185
28th Nov 2013 6:50pm
28th Nov 2013 6:50pm
Joined: Dec 2011
Posts: 1,026
wirral
T
turnip Offline
Forum Guide
turnip  Offline
Forum Guide
T
Joined: Dec 2011
Posts: 1,026
wirral
Which model and engine code/size is it? Usually these are fitted with the Hitachi carbs.

All carburetors except the C-W are 2-barrel down-draft carburetors which supplies the best air/fuel mixture under any operating condition. this is effectively similar to the ubiquitous Weber design.

The C-W is a single barrel carburetor.

The two barrel carburettor uses a progressive linkage between the primary and secondary circuit. So ... first question ...Is the secondary side butterfly of the carb operating correctly? When you depress the accelerator pedal to the floor both the primary and secondary butterfly's should be fully open.

For optimum performance plus fuel economy, the secondary circuit of the carburetor is used only at high engine rpm. Normal low speed operation is handled by the primary circuit (from idle to approx 2500 - 3000 rpm).


Re: Carburettor rebuilds? [Re: DavidB] #840212
28th Nov 2013 8:19pm
28th Nov 2013 8:19pm
Joined: Dec 2011
Posts: 1,026
wirral
T
turnip Offline
Forum Guide
turnip  Offline
Forum Guide
T
Joined: Dec 2011
Posts: 1,026
wirral
sorry, just seen the bottom of your post "C20"

WHICH IF MY MEMORY SERVES ME CORRECTLY IS A FORESTER?

Re: Carburettor rebuilds? [Re: DavidB] #840225
28th Nov 2013 9:45pm
28th Nov 2013 9:45pm
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
D
DavidB Offline OP
Wiki Guide
DavidB  Offline OP
Wiki Guide
D
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
Lol, no the C20LET is a Vauxhall engine (from a Calibra/Cavalier turbo) smile.

The engine is a Subaru EF12! It has a Hitachi carb, which is two barrel. The primary opens on a lever from the pedal, but the second opens using a vacuum from a dashpot - I've tested the dashpot by blowing into it and the lever moves.
The car moves well, even on full open throttle - I believe it is running much better now than when I got it, but it just isn't idling correctly (which is now making me think there IS an airleak like su7ajones says), or something isn't working. I bought some easy start and will try it out tomorrow.

The carb has a duty solenoid which opens a valve in the carb which controls the fuelling/slow air bleed inside. These are known to be dodgy I think.

After running the engine for 20 minutes while I messed around, I revved the engine to 8,000rpm (it's a 3 pot 1.2), and it got there as normal ...
I can tolerate the naff starting (requiring depressing the pedal slightly), and the slight hesistation (esp around corners - fuel starvation?), but the rpm makes it silly to run.
Thanks for your help!


"C20 LET bang"
Re: Carburettor rebuilds? [Re: DavidB] #840226
28th Nov 2013 9:50pm
28th Nov 2013 9:50pm
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
D
DavidB Offline OP
Wiki Guide
DavidB  Offline OP
Wiki Guide
D
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
Just thinking, I'll have to check the ignition timing as well - you can only check this at 800rpm correctly, but will try it out as I did it a few weeks ago when it wasn't running well at all.


"C20 LET bang"
Re: Carburettor rebuilds? [Re: DavidB] #844994
21st Dec 2013 4:52pm
21st Dec 2013 4:52pm
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
D
DavidB Offline OP
Wiki Guide
DavidB  Offline OP
Wiki Guide
D
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
Still have this - converted to manual choke. Have removed the autochoke as it was making a bad situation much worse. It runs, drives, etc., but it's very lumpy. It's overfuelling a massive amount which is what I think is the only problem tbh. I've changed the mixture screw, but it makes no difference. Screwing it right in and it's still running?
I can't believe nobody services carbs anymore.


"C20 LET bang"
Re: Carburettor rebuilds? [Re: DavidB] #845357
23rd Dec 2013 12:08pm
23rd Dec 2013 12:08pm
Joined: Jun 2005
Posts: 541
prenton
sean Offline
Smartchild
sean  Offline
Smartchild
Joined: Jun 2005
Posts: 541
prenton
3 pot, 1.2? I take it that is a justy then? bin it a put an EJ20 in wink

Re: Carburettor rebuilds? [Re: DavidB] #845735
25th Dec 2013 1:00am
25th Dec 2013 1:00am
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
D
DavidB Offline OP
Wiki Guide
DavidB  Offline OP
Wiki Guide
D
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral


"C20 LET bang"
Re: Carburettor rebuilds? [Re: DavidB] #846730
31st Dec 2013 12:05am
31st Dec 2013 12:05am
Joined: Dec 2011
Posts: 1,026
wirral
T
turnip Offline
Forum Guide
turnip  Offline
Forum Guide
T
Joined: Dec 2011
Posts: 1,026
wirral
swap the stock Hitachi for a Keihin from an old Honda Civic 1.3, you have to widen 2 of the 4 mounting holes as the keihin has a slightly different base pattern but by all accounts it is an effective mod. found it on internet!

Re: Carburettor rebuilds? [Re: DavidB] #849526
11th Jan 2014 7:56pm
11th Jan 2014 7:56pm
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
D
DavidB Offline OP
Wiki Guide
DavidB  Offline OP
Wiki Guide
D
Joined: Dec 2003
Posts: 5,677
Bebington, Wirral
I heard the Keihin fitted as a few people have put the carb off a Honda 1.5 on. Also the Toyota Corolla 1.3 fits without much modification. I will buy one if I can find one! Thanks for the help!

I basically completely rebuilt the carb, made new gaskets, and flushed the whole thing through with a whole tin of carb cleaner and put it on (with the manual choke still on).
It started and ran, but the choke pull off obviously wasn't working as the autochoke controls it. I had to have the choke open all the time, and occasionally turning the car off, let it run on for about 3 seconds with a unbelievably loud bang from the exhaust.
Removed the silly manual choke conversion, and thinking it's kind've working OK, I put the autochoke back on, and finally got it running after about 10 minutes of setting up and new vacuum hoses. I've done about 30 miles in it today, which should say it's running good now. smile

Considering what it was like, with fire literally shooting out of the top of the carb, and black smoke from the exhaust (with the odd backfire). smile


"C20 LET bang"

Moderated by  StuyMac 

Random Wirral Images

Click to View Topic.
Newest Topics
10 channels removed from virgin tv
by assassin. 21st Jul 2018 8:33pm
Info on Pilgrim Street, Birkenhead
by Tom_Chisholm. 21st Jul 2018 4:02pm
Finds from 18/07/18 double silver!
by Detecting_wirral. 19th Jul 2018 5:32pm
Newsflash - Wirral's newest Retail Park
by Greenwood. 18th Jul 2018 1:12pm
Dog restrictions on beaches dropped
by Greenwood. 17th Jul 2018 1:41pm
For Sale & Free
BBQ Gas Bottle
by delta6. 16th Jul 2018 6:28pm
Gaz 907 bottle
by Snodvan. 12th Jul 2018 8:30pm
China Jardiniere
by The2Veggies. 12th Jul 2018 8:05pm
Freestanding Cooker Urgently Needed
by The2Veggies. 12th Jul 2018 7:58pm
Frame Tent
by Snodvan. 12th Jul 2018 1:30pm
Member Spotlight
madrob
madrob
birkenhead
Posts: 1,004
Joined: June 2010
Show All Member Profiles 
Newest Members
Mike_Garfield, Tom_Chisholm, MarSal, Mcavoy, FatGuyOnABike
12674 Registered Users
Today's Birthdays
No Birthdays
New Wirral Info
Kitchen Supplier & Fitter + other Recommendations
by Itsme. 16th Jul 2018 10:40pm
apprenticeship for electricians mate
by kazaroo. 12th Jul 2018 2:47pm
Qualified Electrician Needed
by spgb1a. 12th Jul 2018 11:08am
Unknown road name
by max232. 10th Jul 2018 10:41am
Taxi to Manchester airport - recommendations?
by CarterUSM. 9th Jul 2018 10:17am
News : New Topics
Newsflash - Wirral's newest Retail Park
by Greenwood. 18th Jul 2018 1:12pm
Dog restrictions on beaches dropped
by Greenwood. 17th Jul 2018 1:41pm
Hose Pipe Ban
by diggingdeeper. 17th Jul 2018 1:34am
Serious Accident Arrowe Park
by fish5133. 14th Jul 2018 5:10pm
More threats to Wirral's Green Belt
by Greenwood. 12th Jul 2018 1:55pm
New Enthusiast Forums
10 channels removed from virgin tv
by assassin. 21st Jul 2018 8:33pm
Finds from 18/07/18 double silver!
by Detecting_wirral. 19th Jul 2018 5:32pm
Renault Modus 2010
by chrislfc87. 16th Jul 2018 1:48pm
Finds from today 14/11/18 silver again!o
by Detecting_wirral. 14th Jul 2018 10:11pm
Selling Euro ace
by leelad03. 14th Jul 2018 5:32pm
Popular Topics(Views 24hrs)
Wirral Sunrise Sunset
Sunrise Sat 5:11am
Sunset Sat 9:25pm
Local Time Sat 8:35pm
Powered by UBB.threads™ PHP Forum Software 7.6.1.1