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snowrunner

05-27-2021 08:37 AM

500 EFI High Idle?

Just started my motor coming from winter hibernation. Idled normal for a few mins, increase the throttle and wouldn't return to 800 RPM - sits up at 1500. TB is closed, all vacuum lines are connected. Timing confirmed - same goes for all sensors. Temp sensor reading correctly, No codes

Any thoughts?

SB	05-27-2021 08:57 AM

If convinced not vacuum leak or tbody blades hung open s tad, could be stuck IAC (idle air control valve.)

snowrunner

05-27-2021 06:13 PM

Seems to be the problem, replaced an IAC with a new one last season chasing an issue that turned pout to be the distributor. Swapped the original back and it idles at 800 again!

TY

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