Engine becomes unstablem rpm falls and engine stops when A/C works for a while, why?

Asked by b_ghalichi Jul 26, 2014 at 03:29 AM about the 1992 Toyota Corona

Question type: Maintenance & Repair

Hi
I have a 1992 Corona (ST171). When I trun on the A/C, after working for a while (say 20
minutes), engine becomes unstable. Its repm starts fluctuating, it gradually falls and if not
assisted through accelerator pedal, it stops. What's the problem?

200,895

dandyoun answered 10 years ago

Sounds like either dirty/faulty idle air control valve or dirty throttle plate.

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115

Jeannette answered 9 years ago

Too much draw on the battery/alternator. If way old, replace.

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