Hunting

blockh3ad · Post by **blockh3ad** » Sat Jan 12, 2019 6:01 pm

Could anyone shed some light on this please, ticking over cold, hunting. Ticking over hot, hunting, but sometimes it stops hunting, but not very offten

Post by **si import** » Sat Jan 12, 2019 8:02 pm

Try cleaning idle control valve out first . Could also be an air leak .

Post by **vanzep** » Sat Jan 12, 2019 8:07 pm

check the FITV as well- once the car is up to temp then take off the air intake pipe and put your finger over the lower port inside the throttle body - if there is vaccum when up to temp then fitv is faulty/needs cleaned and then reseated(also worth checking the orings and cleaning up any corrosion between fitv and tb)- there should be vaccum there from cold but as the temp rises the valve closes and no vaccum should be present

if thats all ok then it could be iacv - again take it off and blast it clean with some carb cleaner. Also worth bleeding any air out of the coolant system.

Post by **Drax** » Sat Jan 12, 2019 8:10 pm

Yep those, plus could be a clogged/faulty fast idle valve or air trapped in the coolant system

blockh3ad · Post by **blockh3ad** » Mon Jan 14, 2019 7:41 am

Thanks for the response, is there any chance somebody could post some pictures to point me in the right area

89 UKDM BA4 4WS (resto job!) · Post by **wurlycorner** » Mon Jan 14, 2019 8:42 am

See this thread running at the same time

viewtopic.php?f=5&t=22495

Anzezaf · Post by **Anzezaf** » Mon Jan 14, 2019 10:35 pm

When my lude ran seriously low on cooling fluid, it started hunting.
But if you didn't have a huge gushing leak like me, or a persistent small one, then look elsewhere.

Post by **vanzep** » Wed Jan 16, 2019 6:15 pm

yeah ive just reset the fast idle thermo valve on my BB1 - hunting has totally gone and car feels so much better but must have screwed it down a bit too much as it doesnt operate from a cold start - overly fast idle has gone down from 2000rpm to about 1000rpm which is preferable imo- so i would say dont adjust the screw in cap down too tight although i did back it off a turn.