surging idle on '91 convertible

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10-09-10, 07:18 PM

RX7 RAGE

Bann3d. I got OWNED!!!

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surging idle on '91 convertible

The idle surges all the time from 1000 - 1500 rpms even when the engine is fully warmed up. What are some things I can check in numerical order? Thanks for the help.

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10-09-10, 07:26 PM

jjcobm

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Pull codes. A bad air temp sensor causes surging idle. Check/adjust tps to 1v and adjust idle down to 750rpm. Check bypass air control valve. If problem persist (hopefully not) check for vac leaks.