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S Chassis Technical discussion related to the S Chassis such as the S12, S13, S14, and S15.


 
 
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Old 03-02-2021, 09:57 PM   #1
shoottothrill
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s14 Engine RPM falls switching into neutral

Hey guys, I've got a KA S14, stock ECU, stock engine, stock most things. It is a factory auto, manual swapped, still using the stock 3D auto ecu.

What I'm finding is that when I have the clutch in 1st gear, it'll idle where I would expect, 800-900 rpm. Without moving anything else (clutch still in), and switching into neutral, the idle will fall to 500-600 rpm.

If the idle fell the opposite way, neutral to 1st, that would make a fair bit more sense to me. Is this a byproduct of having the auto ecu still in? Would swapping in a 3c manual ecu fix the issue? Anybody ever run into this issue?

Thanks for the info!
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engine idle, idle, ka24de, manual swap, s14


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