Theres like a million vacuum lines on my engine and alot of them seem pointless. Is there any that i can just remove?

 

The direct answer to your question is no. Obviously everything has its purpose. However, if you're willing to put in the time to delete most/all the emissions equipment then you can dramatically simplify the engine bay and be left with only a few lines. Search rats nest delete/removal. Even sites such as Rotary Resurrection will have detailed write ups specific to your engine.

 

Not certain on the FC, but to remove emissions and avoid CELs along with other issues on the FD requires, among other things, a standalone ECU. Bump for additional input...

 

They "seem" pointless?

OK, I may sound like a bit of a jerk here, but it's pretty funny that you think the lines seem pointless, then admit you don't know what they do in asking which ones you can remove.

The long and short of it is that all those lines are part of the fairly creative 80s emissions system, common to many cars of the era but a little more complicated on the rotary due to the way the air pump shuttles air around.

The good part is that aside from the lines becoming brittle, the system is fairly reliable and rarely fails. Just replace all the old rotted vacuum lines with modern silicone lines and you should be good to go.

What you don't want to do is start tearing stuff out or following one of those emissions removal write-ups without knowing what you are doing. Because I guarantee the car will never run right again.

The Factory Service Manuals for all years of RX-7 (and many other rotary cars) can be downloaded for free here: Foxed.ca - Mazda RX-7 Manuals . They contain all common service information and more, and are an essential tool for any sort of service work that needs to be performed on these cars.

Additionally, the Haynes service manual for the 1986 thru 1991 RX-7 (both turbo and NA) can be found at most local auto parts stores or purchased from any good bookstore (ISBN number 1 56392 007 7). It is only about $25 and is a great quick reference for things like this. Not only does it contain most of the information in the FSM condensed into an easy to read format, but it includes full wiring diagrams as well.

These manuals will answer 99% of service related questions for the car and if you intend to do your own repair work, you will need at least one of them. Preferably both, since the FSM is a free download. The Haynes is a good quick reference covering 99% of questions, while the FSMs show complete and detailed procedures.