How to adjust the carburetor in an it RX-7?

Everything else is a “replacement, rebuild or modification.” You’ll find a single, slotted brass screw on the side of the carburetor that controls the air/fuel mixture at idle. Idle should rest at 850 rpm. Turn the screw in one direction, slowly, and idle will accelerate; turn it the other direction and idle will slow. Adjust it to 850.

What should idle speed be on a Mazda RX-7?

Idle speed is the only real “adjustment” on the RX-7’s carburetor. Everything else is a “replacement, rebuild or modification.” You’ll find a single, slotted brass screw on the side of the carburetor that controls the air/fuel mixture at idle. Idle should rest at 850 rpm.

How to change the TPS on a RX-7?

If you don’t find 1K ohms between terminals A and B in the idle position, turn the flat-head screw found on the arm touching the TPS until you’re very close to or at 1,000 ohms. After doing so, it’s not a bad idea to open the throttle by hand and let it close by itself, then re-set the TPS resistance.

What to do when idle adjustment does not work?

Check the ISC solenoid (the manual has you pull the extension manifold, unbolt the solenoid, ohm it out [~11 ohms] and replace it if it fails. This is stupid. If it was failing the resistance test badly, it should be reported by the ECU, and if it’s stuck, it will ohm ok and just not work.

How to adjust the idle speed of a car?

Idle speed adjustment: bring engine up to normal operating temperature connect TEN and GND connect a tachometer to diagnosis connector pin IG- and a chassi ground make sure the wax rod operated lever completely separates from the fast idle cam

Where is the idle speed adjustment screw located?

adjust idle speed to approx. 725 rpm by turning the idle speed adjusting screw located UNDER the throttle body between the two 10mm cap nuts that attach the charge air pipe to the throttle body

How to adjust the carburetor in an it RX-7?