forgive my ignorance here - I'm a pre-60's kind of mechanic - the kind where you could climb right in the engine compartment and get to know your motor. My son just transplanted a motor from an 82 to an 81 RX7. It was minimal disconnects, r and r'd as an eng/gearbox assembly. I drove the donor car home, so I know it ran like a champ. Everything seemed to come across fine, but the secondary ports on the carb don't seem to be opening, resulting in pretty sluggish performance, as you can guess. Any clues on what I might look at? I'm assuming the butterflys open with a vacuum of some type - they turn free and the son says at about 6000 rpm it lights right up. Thanks!!

 

did you replace all the vacuum lines?

 

Didn't replace any - don't hear any leaks and it seemed to be fine 2 weeks go when it was in the donor car. thanks

 

did you move anything on top of the motor during the swap. if so, it's possible that one or more of the lines may have cracked. it's always a good idea to replace vacuum lines when you get the chance.

 

use peice of wire to make them mechanical
search for mechanical secondaries to get a how to if you need it

 

At the back of the carb (toward the passenger cabin), there's a cable with a "T" shaped end. This end is supposed to fit into its 2-prong holder. If this "T" end is not in its holder, i believe the secondaries will not open.

 

something like this hapened to me when i first got the car. there is a litle metal swing looking piece conneted to a spring, mine was flipped over to far, i flipped back to the right place a bam i had a new car, and didnt have to floor it everywhere i went.better gas milage too! the pedal felt really firm when this peice was sitting wrong and as soon as a filpped it the pedal was much "free" feeling ...(thanks to FB II)