need help today i went to the work shop that have equipmenst that read the exaust emission test and the techninican say the mixture is too lean and need to remove the carbruter to clean the "idle path and another jets"

i refused as it was so expensive also afraid that my carbruter become worst.

noticed the vaccum gauge reading about 21 inhg so no vacuum leaks + i clogged the pull down unit vaccum mecanism as it was not working to prevent any vaccum leaks

any advices that help to solve this problem  ?

thanks

13 hours ago, captain_crunch said:

any advices that help to solve this problem  ?

How about telling us the whole story from A to Z instead of asking partial questions in various topics?

15 hours ago, RicardoM said:

How about telling us the whole story from A to Z instead of asking partial questions in various topics?

yes you are right as i first asking about mixture screw and idle screw in first topic after that in this topic i complian because too lean mixture

The issue is that form a short time i bring a vaccum gauge and start to tune the mixture screw to give higest  vaccum reading the fuel consumption become very good but felt little bit of lack in performance and exhaust detonations during deceleration

i first want to compare my carbruter screws with the original ones and thanks to your reply to  the first topic the result that they was the same

after a couple of days i went to workshop have equipment that read exaust emission and confirm that my mixture is too lean but the problem that technican want to remove the  carbruter and check it + expinsive service so i refused (what is the point of remove it)

finally i found this troubleshooting table

and compare my case with the table Exhaust detonations during deceleration and found some causes in points 10 , 11 , 17 , 20

finally the problem solved as i start with number 10 ((Idle setting incorrect)  i rotate mixtre screw about 1 turn anticlock wise and the problem solved

i will continue tracking fuel consumption after this settings and check spark plugs colour .

 

 

Yeah, I know that table since it is a part of the manual written by me about tuning the carburetor on Felicia/Favorit.

Tips:

1. after you'll find the highest vacuum using the mixture screw, unscrew it 1/2 turn more. That will help getting fast throttle response.
2. engine tuning is a bit of an art. It is a combination of finding the right mixture, the right idle speed, and the right ignition advance.