2fast4u_rx7

My 93 FD for some reason is having the bouncing idle. It is bouncing between 1500rpm to 2100rpm. I started off by replacing the Vac lines with silocone ones and hoping that this was the problem and still same problem. So I figured maybe the Check valves were bad becuase one was cracked so I replaced all of them and still the same idle problem. I am not sure what to do. My only guess now is a TPS. So how would I know if I had a bad TPS? If I were to change it, do I need to adjust it or simply just bolt it in? Well a good friend of mine has a FD as well and he is nice enough to let me take his TPS out of his car and put it in mine to try but the only thing is that if it does require fine adjustment I wont take it out of his car becuase I dont want to make his idle all messed up. Let me know guys. Thanks in advance.

aaron1017

Check the voltages of the TPS and Idle Air controller to confirm... in section F of the shop manual.

Mahjik

iTrader: (1)

If you change it, you'll need to adjust it.

https://www.rx7club.com/3rd-generation-specific-1993-2002-16/fixed-my-idle-problems-backfiring-bucking-more-170731/

2fast4u_rx7

Ok, Now how do I get to the TPS screws, there are two screws on the TPS that are phillips head. I dont have a screw driver short enough to go in there. Any suggestions?

Mahjik

iTrader: (1)

Take the TB off and replace the screws with hex head bolts.

2fast4u_rx7

Ok, do you know the size of the bolts?

Mahjik

iTrader: (1)

Not off hand. Just take one screw out and take it to a hardware store to get a replacement.