I just bought an 87 RX7 NA with around 120k miles on it, but I have a problem. It won't idle. It starts up fine revs to about 2000RPM and then stalls out. You can restart it and it will do the same. The car won't idel once it's warmed up either.

I have changed the tps, MAF and BAC from another RX I have and it still does the same. The car has plenty of power but you need three feet to drive it. I checked for vaccum leaks and could not find any.

The car runs geat above about 1700 RPM when you give it gas. But when you let off the gas it just falls on it's face. What do you think is wrong? I'd like to drive the car without having to restart it when I lift off the gas.

TIA,
IndyRX7

 

Have you checked the primary throttle plate opening for correct gap & crud buildup? Tweaked on the idle adjust screw? Checked to see if the BAC system was working at all after you swapped in another one? The injectors due for a cleaning? Plugs?

 

There's no crud in the throttle body and it is openig right. I have also adjusted the idel screw along with making sure both BAC's were working. Plus I put new NGK plugs in as well. I guess the injectors might need a cleaning, I don't know the history of the car.