When im in traffic, foot on break pedal and air is going(not ac, just the fan) usually on 2 or 3, it sucks a lot of power from the engine and my rpms drop down. Battery is somewhat new and alternator is brand new. Is there any way to change that? I think I had this same problem with my ST back in the day.
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Put the a/c on so your rpms drop for a good reason...
Your ac compressor clutch could be stuck
Your ac compressor clutch could be stuck
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Questionable grounds?
'97 ST\ Eibach \ KYB \ Kenwood \ Alpine \ Cusco \ OEM+[sold 10/18]'93 MX-5LE
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It's not a huge drop, just a little, same thing at night when headlights are on, foot on break, or when I turn on my fog lights, which are 100 volts, so that's understable.
QUOTE (njccmd2002 @ Apr 26, 2018 - 11:20 AM) 
>Put the a/c on so your rpms drop for a good reason...
Your ac compressor clutch could be stuck
Your ac compressor clutch could be stuck
It's not a huge drop, just a little, same thing at night when headlights are on, foot on break, or when I turn on my fog lights, which are 100 volts, so that's understable.
Have you had both the new battery and alternator tested? There could be a slight defect in either one, otherwise Id agree that its likely a ground issue.
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Thanks guys.
My idle is fine with the blower on, but does dip somewhat when the amp is running and I hold the brake. It does have a new alt and battery, to add to the discussion like Dan said, so I suspect grounds for myself as well.
'97 ST\ Eibach \ KYB \ Kenwood \ Alpine \ Cusco \ OEM+[sold 10/18]'93 MX-5LE