C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

69 Rochester 4MV float level question

Thread Tools
 
Search this Thread
 
Old 02-14-2003, 11:49 PM
  #1  
telk
Advanced
Thread Starter
 
telk's Avatar
 
Member Since: Oct 2000
Location: Louisiana
Posts: 96
Likes: 0
Received 0 Likes on 0 Posts
Default 69 Rochester 4MV float level question

Can the float level be adjusted on this model without taking the carb off? Any links on this subject? Float adjustment is 3/16" right? Any advice or pointers greately appreciated. Almost scared to do this because car runs great. Just very rich. Thanks in advance
Old 02-15-2003, 03:25 AM
  #2  
V8yunkie
Racer
 
V8yunkie's Avatar
 
Member Since: May 2000
Location: Niedernhausen, Germany
Posts: 386
Likes: 0
Received 0 Likes on 0 Posts

Default Re: 69 Rochester 4MV float level question (telk)

There is no need to pull the carb... have a look at http://www.corvettefaq.com - they have Lars' instructions along with great hints for trouble-shooting and tuning.

However I doubt the float level to be the reason for running rich.
If it runs rich in idle, it might be a bad adjustment of the idle mixture screws, bad power valve or bad choke mechanism.

If it runs rich in cruise or WOT, then the jet/metering-rod-combination is not right.

Have a look at Lars papers, they tell you about everything.

Thomas
Old 02-15-2003, 06:32 AM
  #3  
Larry B.
Le Mans Master
 
Larry B.'s Avatar
 
Member Since: Sep 2000
Location: Orlando Floriduh
Posts: 5,635
Likes: 0
Received 3 Likes on 3 Posts
Default Re: 69 Rochester 4MV float level question (V8yunkie)

GM had some problems with early nitril(foam) floats absorbing fuel. The ONLY customer complaint was bad gas milage, nobody had a running problem A heavy float will definatly cause a rich condition. There are many other thing that will cause a rich condition though. Choke sticking or mal-adjusted,With Q-jets, avacuum leak or low vacuum due to a cam change will do that too.


[Modified by silvervetteman, 6:34 AM 2/15/2003]

Get notified of new replies

To 69 Rochester 4MV float level question




Quick Reply: 69 Rochester 4MV float level question



All times are GMT -4. The time now is 10:16 PM.