'89 3Y High Idle

Discuss modifications on your 1979 to late 1998 SFA 4x4 Hilux here.
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Posts: 9
Joined: Sun Apr 09, 2017 2:46 am
Town: Blacksburg
Vehicle: '89 Hilux DC Firetruck
Real Name: Simon

Thu Apr 13, 2017 7:09 pm

Hey all, my hilux has been idling rather high at startup - roughly at 2k rpm. I can rev the throttle for a quick second up to 3000ish rpm and it will drop back down to 1000. Is this the carbs or air control telling me something?
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Mud Dog
Posts: 29109
Joined: Tue Apr 29, 2008 2:18 am
Town: East London
Vehicle: '90 SFA Hilux DC 4X4, Full OME, 110mm lift. Brospeed branch, 50mm ss freeflow exhaust. 30 x 9.5 Discoverer S/T's on Viper mags. L/R tank. (AWOL) '98 LTD 2.4 SFA, dual battery system. Dobinson suspension, LR tanks, 31" BF mud's.
Real Name: Andy
Club VHF Licence: HC103

Fri Apr 14, 2017 8:36 am

I would say it's more like something sticking. Start by lubing all the linkages on the carb (cable too if you can manage it). Does your carb have an auto choke? (Mine is a manual choke on on the Hilux work bakkie). If it's an auto choke, that could also be sticking.

Although not the most likely probability, it's also possible that the butterflies are a bit sticky.

Don't try making adjustments at this point - if it returns to idle as you say after a blip of the throttle and if your fuel consumption is still the same, it's not an adjustment problem (although the 1000rpm idle is a bit high and should be in the region of 800rpm.
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