Signs of Needing a Carb Rebuild
10-21-03, 09:35 AM
#1
Save the TII from a V8
Thread Starter
Join Date: Nov 2001
Location: Ontario
Posts: 1,941
Likes: 0
Received 0 Likes
on
0 Posts
Signs of Needing a Carb Rebuild
Greetings,
I don't know much about carbs, did alot of reading and searching but I couldn't find any real applicable answers to the signs of when I would need a rebuild. I have a 45mm Weber DCOE 2-barrel sidedraft.
I'm thinking I need a rebuild because I'm getting these symptoms:
-popping noises (like popcorn popping) when I take my foot off of the throttle from high rpms (4-6000 rpms)
- a bit of a hesitation at low rpms (1-2000 rpms) when I accelerate (could be because of the physics of a 2 barrel?)
- with the choke engaged, I have to pump the gas 7-10 times, crank 2 or 3 times and the car starts
-extremely poor gas mileage, I'm talking about (if I'm lucky) getting barely 300 kms on a full tank of gas and I drive rather stingy daily
I'm looking to rebuild my weber carburetor, I have ZERO experience in rebuilding carbs but I do have the patience and did some tinkering with cars in the past. Anyone with experience recommend that I do this on my own? Thanks in advance for your opinions.
I don't know much about carbs, did alot of reading and searching but I couldn't find any real applicable answers to the signs of when I would need a rebuild. I have a 45mm Weber DCOE 2-barrel sidedraft.
I'm thinking I need a rebuild because I'm getting these symptoms:
-popping noises (like popcorn popping) when I take my foot off of the throttle from high rpms (4-6000 rpms)
- a bit of a hesitation at low rpms (1-2000 rpms) when I accelerate (could be because of the physics of a 2 barrel?)
- with the choke engaged, I have to pump the gas 7-10 times, crank 2 or 3 times and the car starts
-extremely poor gas mileage, I'm talking about (if I'm lucky) getting barely 300 kms on a full tank of gas and I drive rather stingy daily
I'm looking to rebuild my weber carburetor, I have ZERO experience in rebuilding carbs but I do have the patience and did some tinkering with cars in the past. Anyone with experience recommend that I do this on my own? Thanks in advance for your opinions.
10-21-03, 10:33 AM
#3
Save the TII from a V8
Thread Starter
Join Date: Nov 2001
Location: Ontario
Posts: 1,941
Likes: 0
Received 0 Likes
on
0 Posts
Found 3 different books.
http://www.webercarbsdirect.com/technical_manuals
I can't go wrong with the tech manual directly from weber right?
http://www.webercarbsdirect.com/technical_manuals
I can't go wrong with the tech manual directly from weber right?
10-21-03, 03:15 PM
#4
Nikki-Modder Rex-Rodder
Join Date: Feb 2001
Location: Trying to convince some clown not to put a Holley 600 on his 12a.
Posts: 2,890
Likes: 0
Received 13 Likes
on
6 Posts
Did this always happen? It sounds to me like it just needs to be properly tuned. Though you won't see much power that low in the RPMs from any rotary- especially with a two barrel, the hesitation you mention seems like an accelerator pump adjustment is needed.
Thumb through this for info.
Thumb through this for info.
10-23-03, 01:47 PM
#7
Save the TII from a V8
Thread Starter
Join Date: Nov 2001
Location: Ontario
Posts: 1,941
Likes: 0
Received 0 Likes
on
0 Posts
Tried tuning the car last night doing the 'best lean idle' procedure.
Its strange, after I think I got the right idle speed inside the garage, I go outside for a quick test drive and notice that my idle speed is higher than what I originally thought I set it at. Setted my idle speed outside and now the car runs pretty good. Solved my popping when I let off the throttle theres still there a bit of hesitation.
I'm thinking of changing the venturi, main fuel jet, air jet, idle jet sizes. Anyone know of a cool 45mm dcoe setup that worked for them?
Its strange, after I think I got the right idle speed inside the garage, I go outside for a quick test drive and notice that my idle speed is higher than what I originally thought I set it at. Setted my idle speed outside and now the car runs pretty good. Solved my popping when I let off the throttle theres still there a bit of hesitation.
I'm thinking of changing the venturi, main fuel jet, air jet, idle jet sizes. Anyone know of a cool 45mm dcoe setup that worked for them?
Thread
Thread Starter
Forum
Replies
Last Post
rx8volks
Canadian Forum
0
08-13-15 04:55 AM
