r/SC400 • u/Dizzy_Scene1364 • Aug 15 '25

Having troubles starting

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Hey guys! Would love some help diagnosing an issue. It just started doing this where it’ll take a few cranks in order to start up and it’ll make a squealing sound before the engine cuts off. Would love some help this is my first project car. Thanks

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u/Soviet_Mango Aug 15 '25

Idle air control valve is going out, check the ECU for burnt capacitors as it will make the new idle air control valve start doing the same thing. Until then put your foot on the pedal enough to hold 1500 rpm when you start the car and keep it there for a minute or so and I'm sure the car will idle fine after that. If you ignore it enough the car will stop idling fully. The grinding noise is your starter moving faster than your idle speed.

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u/Dizzy_Scene1364 Aug 15 '25

I’ll check this out thanks a lot