maybe someone can help this crazyness my 89 rx7 verts ck engine light after start up comes on then goes off when i accelerate when i come to a stop or idle it comes back on. checking the codes it dosent flash any i dont get it

 

by the way its running perfect i just replaced the light swetch because the tailights and dash were blowing the fuse

 

having this same problem with my fd i just bought..

 

There is a Green Check Connector w/a single Orange wire located by the leading coil. Ground this wire to the negative battery terminal and then turn the key to on and if there are any error codes it will be displayed. Do this to see if you can get a better handle of what's going on. A guess would be it's TPS or Oxygen Sensor related, but it's just a guess.

 

ya it gave a code 12 tps does that mean its bad or just needs ajusting

 

Start by adjusting it.

If you have an analog meter or a scope, run the TPS through its entire range and check to make sure it's smooth.

If the reading jumps around or the problem continues after properly adjusting the TPS, replace the TPS.

 

And make sure the plug connector for the TPS is solid such that the connection between the two plugs are mated well, that none of the wire/pins are pulled back, and that there is no corrosion on the pins. The Green/Red wire should read 1 volt w/key to on after the engine is as warm as it can possibly get.

 

thanks is there a place that tell me how to do this cause it running so well

 

Do you know where the TPS is located? Is your car a turbo or non turbo?

 

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.

 

its a non turbo and i do know where its at

 

the FSM says do not ajust the throttle sensor unless u r replacing it because theres a auto-ajust system in the ECU why is that

 

Post #7 tells you what you need to know related to setting the TPS. It's easy for the TPS to be out of spec thus it would need to be readjusted. The TPS has two ranges you're just trying to set one of them and not both.

 

when i look at the 89 fsm the only place i find any thing on the tps is on pagef1-83 of the fuel section which only tells how to check if its bad not how to ajust it

 

You check the voltage on the G/R wire w/key to on after the engine is as warm as possble. The adjustment screw is in front of the throttle body and part of the throttle linkage. The screw is about an inch long encased in a spring. You adjust the screw to bring the TPS within spec.