1987 droptop. Sometime when i can to a stop sign or light. when i press the clutch the car never goes below 1500 rpm. its like a hit and miss problem. sometimes it does it and sometimes it doesnt. how do i idle my 87??


1987 GT, 302, gt40 heads, longtube headers, sr intake,e303cam, hurst shifter, 70mm throttle not install yet.

 

Clean the Idle air control valve and then do a base idle reset.
1. Disconnect the battery's negative terminal to reset/clear the computer's memory. Leave it disconnected for 30 minutes. WARNING: Whenever removing your battery cables ALWAYS disconnect the negative battery cable first and reconnect it last. Otherwise you could destroy your computer or cause a battery explosion.

2. Disconnect the plug going to your IAC motor

3. Reconnect your battery's negative terminal.

4. Start the engine, and set the idle to the rpm you want with the stop screw on the bottom of the throttle body.

5. Turn off the engine.

6. Reconnect the plug on the IAC motor

7. Make sure all accesories (radio, blower motor, a/c, lights, etc) are off and start the engine.

8. Let engine run for two minutes.

9. Turn engine off and wait two minutes then restart engine and let idle for two minutes with all accesories on.

If that doesn't work , you may need a new VSS or the TPS is not set properly.