Engine Dies at Idle with AC on.

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08-31-2014, 10:48 AM

my97miata

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Engine Dies at Idle with AC on.

Usually after the engine has been running for a while and its really hot out the engine dies when sitting at a traffic light with the AC on.
What's the most likely cause?
This problem just started on Friday.

08-31-2014, 11:57 AM

Onyxyth

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Is this the stock ECU?

I'd be looking for vacuum leaks.

08-31-2014, 12:19 PM

psyber_0ptix

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Hell I wish My A/C did anything when I turn it on.

If it's MS, maybe you have to adjust the idleup and duty cycle. If stock ECU, then the above as mentioned. Might be grabbing unmetered air from a leak and leaning out as it tries to compensate