i have a strange hissing sound coming from my 1st gen 13b fuel injected rx 7 and im hopping one of you could help me shed some light on it, it was working fine up until two weeks ago then all of a sudden i significantly less power going to my wheels when i accelerate, the hissing only occurs as i accelerate

im relatively new to cars and Wankel engines so try to use lei-men terms
any help is appreciated

btw i live in the Canadian maritime so there not too many places i can take it too have some one really skilled in it, unless there is someone i don't know about

 

Maybe the cats are clogged/restricted causing a lot of backpressure on the engine to cause a powerloss and the hissing could be an exhaust leak making noise due to the pressure. I would start by either disconnecting the exhaust at the manifold to see if the power comes back or inspect EACH converter for blockage.

 

i spose it would have also helped if i said i had a gsl-se as well...

 

Hey man if the emmisions are still there i would check the hose that connects to the air pump my 85 gsl-se had a leak there and it would hiss horribly when i gave it gas i hope this helps and by the way if you ever have any gsl-se questions just shoot me a pm and ill be glad to help you to the best of my ability.

 

Sounds like a vac leak somewhere to me...I would start replacing all the vac lines. Even if some or most aren't leaking, it is an old car. Did this on my cars and even though I didn't have any leaks, it seemed to run better...maybe I had a plugged line or something....anyways, that's where I would start