No top end power, need help

EmersonC said

I took a quick look at the secondaries and they move freely. this doesnt tell me though if they moove while the engine is running. another thing I will check this weekend. Guessing I can just have the car in park witht the air cleaner off and open the throttle and I should see the secondaries open up (hopefully)?

Click to expand...

Well if you hold open the top plate on the secondaries, while a friend is flooring the pedal (with the engine and key OFF), you should be able to see the secondaries open down below. Ensure they open fully or readjust the pedal linkage so that they do. Then in the future, if you don't feel the secondaries kick-in, test the top plate to see if it is sticking closed.

The top plate is vacuum actuated, so when the secondaries are opened,the top plate ensures that only the amount of air the engine can use is actually released to the secondaries (in simplistic terms).