Idle Speed Control

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05-10-03, 02:25 PM

jdtanksley

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Idle Speed Control

I have been trying for weeks trying to get my car started again after doing several upgrades. Now I have several problems I am trying to resolve. The one I want to ask about here is the Idle Speed Control.

When I crank the engine a couple of times, the ISC starts buzzing loudly. Most of the time, it will continue until I kill the power. Other times, it eventually stops. Is it toasted, or is the ECU (Power FC) trying franticly to adjust the idle?

Thanks…

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05-10-03, 02:31 PM

SilverRX7

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Im not an expert on the rx-7 ecu.... but usually the idle speed controller is open loop... so it has a certain set of parameters that it runs... so I don't believe the controller would be the root cause of your problem... it sounds like a hardware issue(proly unrelated to the mods you did).

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05-10-03, 11:40 PM

Trout2

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I've encountered the buzzing noise from the Idle Speed Control Motor on a few FD's with PowerFC's including mine. ISC failure is not very common and even with Malloy Mazda's discount it is over $400 for a new one.

Jack

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05-10-03, 11:54 PM

Dont_Be_A_Rikki

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Well, I have never seen this @PFS but anyone who has a tec2 or 3 will have a spare ISC. Also I may have a spare at the shop call me and I will look. I may forget.

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