Hy, I've bougth recently a 93 FD3s that was disassembled for over 7 years, and for my surprise, it started nice and easily after 4 or 5 seconds of starter, but then, after being working at idle for about an hour, a friend of mine went for a ride and pushed hard (high revs, burnouts) and when he arrived, the engine was running bad, with a boucing idle and a little vibration when the rpm drops. I've changed the throttle position sensor and now the idle it's better (It doesn't bounce anymore, but sometimes it's at 950rpms, others at 600rpms). The issue now it's mantaining a certain speed/rpm, keeping the accelerator in the same position (for example at 3000rpms) , the engine bounces between 3000rpmsand 3600rpms, +-.
I didn't find any vacuum leaks and the only odd thing notice is that it gains much pressure on the cooling sistem and if I try to open the coolant cap, it throws out the coolant( I really don't know if its normal) and also an oil pressure drop, after being working for a while(I believe it's an oil leak near the turbochargers).
Sorry about the long text, but I tried to be the most accurate as I can.
Here in Portugal there's no one who understands these engines,or this car particularly...
Hope you can help me... thanks

 

Ola.

Here is a link to the FAQ thread with a collection of useful info and how-to threads:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/faq-3rd-gen-other-useful-links-68640/

Check out these threads under T for TPS:
https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fixed-my-idle-problems-backfiring-bucking-more-170731/
https://www.rx7club.com/showthread.p...&highlight=tps

Do you know how much boost the car was running when your friend drove it? The fuel system only has enough fuel for about 10-11 PSI. If something is not working in the boost control system, he could have run higher than that and blown the motor. That would result in a really bad idle. If you are concerned about that, try a compression test. There is a how to in the FAQ for that also.

Boa sorte.

PM if you need direct help.

 

closing since this was a dupe thread