Ok. I bought my car a week ago and it used to just stop at 4k rpm. after a few days it went above 4k but had no power. Now it gets to 4k but after that if i give it more then 1/4 throttle is spits and sputters. I'm new to rotary engines and this thing has me stumped. the 5th and 6th aux actuators work. the one on top of the intake works. Ive put about half a tank of 93 octane through it. I'm changing the fuel filter and checking the ignition system today. Any suggestions are greatly appreciated. I do have a now coolant temp sensor but I am not looking forward to putting that in so probably wont get done yet. Thanks

 

Check your grounds: Proper RX-7 Grounding Procedures

Adjust your TPS as per the FSM instructions.

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 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.

 

And fixed. fuel filter was clogged letting barely enough fuel through to power up to 4k. The car did sit for 2 years so I'm ordering 2 more filters to change out. first one (depending on how much i drive it) in 3-4 weeks. the second putting on in the spring. thanks to aaron cake for the links as well. will come in handy in the future I'm sure.

 

If it's sat for two years, then you need to clean out the entire fuel system including having the injectors cleaned/tested by a professional injection shop. Trust me on this. Failed injectors are the #1 cause of issues after a car has sat and a quick way to blow an engine.

Removing An RX-7 From Storage, Dealing With Improper Storage