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E4ME QUESTION

S

ss_slayer

Guest
ok, maybe this could sound like a dumb question but anyway here it goes, when should the secondary throttle should open completely? mine just opens a little bit at full throttle, is this normal?
 
Joined
Apr 29, 2001
Messages
2,141
Location
Rio Rancho, NM
Corvette
1981 HD Suspension; ZN1 Option
Slayer,

I hate to ask you a question in response, but is your electric choke working properly?

There is a secondary valve lock-out lever feature that is designed to work while the choke still warming the thermostatic spring. It prevents the secondary system from engaging while the choke still on.

This is just an educated guess, since I am more confident about Holley carburetors than Q-Jets (and I had E4ME overhauled for me,for I did not want to experiment with my original L81 carb).

Perhaps JohnZ, Jack, or Stingray6974 (Mike) can chime-in on the subject and volunteer possible explanations to your question.

GerryLP:cool
 

Sensei

Well-known member
Joined
Apr 5, 2004
Messages
393
Location
Jacksonville, Fl
Corvette
'81 dark blue
Your adjustment is wrong, the secondary throttle plates should start opening at about 40-60% throttle, and arrive at 100% open at the same time as the primaries. Now if you are talking about the secondary air valve (the butterfly on top of the secondaries), that should not open at all by opening the throttle, engine running or not. The air valve opens by engine demand (load) so you would never actually see it open unless you are running down the road with no hood or air cleaner. God bless, Sensei
 

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