so im going to buy an s5 1990 rx7 vert with 122xxx,for 500, no smoking alittle of blue smoke on start up witch is normal i believe, first question is, the cars starts great cold an idles, next is when i went to drive it it spuderd an back fired an was hesitant from 1000rpms to 4000, an got better after that, doesnt like to start warm i notice the previous owner gave it gas when cranking it, does that have something to do with it, flooded maybe ,an i have previously bought a 87 turbo 2 with no motor i want to make this vert a turbo car., whats an easy way 2 check the tps , an how do i know if its the cats or the injectors, or ground or the ecu, thanks for helping me out

 

blue smoke is never normal. blue smoke = burning oil from bad oil seals. doesn't matter if its a piston or rotary.

 

it smoke kinda blue ish at start up for 10 sec

 

It likely is a TPS related problem. You will find checking procedures in the Haynes or FSM.

The Factory Service Manual can be found in the FAQ For FC thread. It contains all this information and more, and is 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.

 

ok thanks guys, i got it home 2day. barely , the car had speratic idle, an didnt run at all, when every i gave it gas the rpms went up but the speed didnt it was poping an back firing like crazy, i couldnt put a load on the engine

 

an now the car just cranks over an will not fire , need help thank u,

 

compression came back at 90 n 90 on both rotors

 

Flooded?

Can you give a very clear description of the problem, point by point? What is the history of this car? Has it been sitting?

 

it has been sitting, ok the car starts ok cold but once warm doesnt start well at all, so i thought of a clogged cat, i took off the pipe where the egr is an it started better, ok now for when it drives, it back fires nonstop an is hesitant thru the rpms, an you cant accelorate the car with out major poping the rpms will go up but the speed will not

 

How long has the car been sitting?

Pipe where the EGR is? You mean the pipe that leads from the lower intake to the main cat? That is the split air pipe. If you just "take it off" there are other steps necessary to make the car run properly.