How do I adjust idle speed?
Discussion
Taken from G.Varleys website:
Engine Idle; This is not a fix for a lack of a service. It is just an interim measure , and is no substitute for a diagnostic reset. If the car has just been serviced it should always idle from cold no problem, but can reduce after 1000 miles. Best thing is get the diagnostics reset between services.
Adjust at centre between 3 & 4 under the fuel rail the lower grub screw of the two is the idle screw with a locknut on it, gently push against the spring to see the increase in idle revs and see the correct one for adjustment. Firstly clean the airbox, pipes and throttle bodies as this can effect cold idle; With engine stopped and cold loosen 8mm locknut and start engine and check idle rpm, set by adjusting grub screw to 750-800 cold, this should be about 850-950rpm when hot, tighten locknut. The idle can become lower between service intervals as the tappets clearance reduces
Engine Idle; This is not a fix for a lack of a service. It is just an interim measure , and is no substitute for a diagnostic reset. If the car has just been serviced it should always idle from cold no problem, but can reduce after 1000 miles. Best thing is get the diagnostics reset between services.
Adjust at centre between 3 & 4 under the fuel rail the lower grub screw of the two is the idle screw with a locknut on it, gently push against the spring to see the increase in idle revs and see the correct one for adjustment. Firstly clean the airbox, pipes and throttle bodies as this can effect cold idle; With engine stopped and cold loosen 8mm locknut and start engine and check idle rpm, set by adjusting grub screw to 750-800 cold, this should be about 850-950rpm when hot, tighten locknut. The idle can become lower between service intervals as the tappets clearance reduces
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