Ursprungligen postat av
baggen1970
Efter lite googlande så kommer några tips :
From the chacal file, reasons for high idle:
- A lean air-fuel mixture condition, which can be caused by a variety of problems......vacuum leaks, plugged or too-small fuel jets, etc. Old or "stale" gas may also cause a lean fuel-air mixture to occur temporarily (until the fuel is used up!).
- A vacuum leak somewhere in the intake system.....intake boots, internal o-ring seals, etc.
- Mixture screws not properly set or adjusted.
- Vacuum piston sticking or stuck in a partially raised position.
- Idle speed screw set too high, or set to create a "proper" idle speed when the engine was cold (and thus results in a "high idle" once the engine reaches operating temps). The idle speed when the engine is cold should be modulated via the use of the choke (enrichment) control system.
- Butterfly valves opened too far; synch screws out of adjustment.
- Throttle cable wear, adjustment, or throttle lever brackets installed incorrectly or interfering with other nearby objects (cylinder head fins, etc.).
- Choke (enrichment) circuit is stock "open"....this can occur even if the choke lever is rotated to the fully closed position, if for some reasons the choke plungers are not fully closing (cable wear, cable adjustment, bent finger brackets, or installation problems).