I have a missfire all the way through the rev range and when you hit 3500r.p.m onwards on full throttle it throws out loads of blue smoke finishing at 6500 r.p.m with a backfire and a big cloud of white smoke. I have changed the turbos,plugs,leads and oil pressure steppermotor in the last few weeks to try and cure it but i think it's the engine.Can anyone tell me if i'm right before i go and get one.And how hard are they to rebuild? and is it just easier at this point to get a 20b engine?

cheers for any replies, Paul.

 

Have you had a compression test done on the engine yet?

As far as a 20B, you should read this thread:
https://www.rx7club.com/20b-forum-95/where-does-all-costs-come-59544/

As far as rebuilding the engine, it's not difficult to do; but it's difficult to do it right. You can purchase a video which can aid in stepping you through the process here:

http://www.rotaryaviation.com/overhaul_video.htm

 

How do you carry out a compression test on these engines? do you only remove the top plug or both, etc etc...??

 

http://www.scuderiaciriani.com/rx7/c...sion_test.html

 

I just went out for another blat in the car and i think it's truly stuffed now,i'm loosing water and oil but i have no drips of any kind under the car, honestly it's like a red arrow when i boot it now,if i did some amazing turns in the road i could write my name with the smoke. Thats got to be the engine hasn't it??

 

Get a compression test done. That will let you know for sure. If you an't do the test yourself, it's usually only $50-65 to have a shop or a dealer do the test for you.

That $50-65 can save you a lot of headaches sometimes so it can be worth it.

 

cool i'll get it done.

cheers for helping me out, Paul

 

how does it run, is it at least driveable?? Does the popping sound like an exhaust leak?? I hear popping noise from a rotary is not good if you let it run like that. When you say misfire, do the rythms skip? Could possible be an oil leak on the turbos.