Won't Idle

Definition: Engine starts OK, but dies at idle. Will run if accelerator pedal is held at part throttle.


^ Perform "Diagnostic Circuit Check - Calif".


^ Perform "Systems Performance Check." if possible.

^ Visual (Physical) Check:


- Vacuum hoses for splits, kinks and proper connections as shown on Vehicle Emission Control Information label.


- Air leaks at carburetor mounting and intake manifold.

^ Check carburetor float level using external float gage.

^ Check for carburetor flooding.

^ Check EGR system, See Chart C-7. Check for a loose valve or sticking EGR plunger. If sticking operation is found, clean or replace valve. There should be no EGR at idle. It may be necessary to remove the valve to check for leaking.


^ Check engine idle speed. See Vehicle Emission Control Information label.


^ Check carburetor idle adjustment. If unable to adjust, check carburetor idle system.


^ Check spark plug condition and gap.


^ Check for exhaust system restriction.