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

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

Question type: Maintenance & Repair

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?

2 Answers


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


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

Your Answer:

Toyota Corona Experts

  • #1
  • #1
    Kim Ford
  • #1
View All

Related Models For Sale

Used Toyota Corolla
739 Great Deals out of 63,429 listings starting at $1,495
Used Toyota Camry
865 Great Deals out of 71,351 listings starting at $1,000
Used Honda Civic
469 Great Deals out of 44,227 listings starting at $1,150
Used Toyota Celica
3 Great Deals out of 258 listings starting at $1,300
Used Toyota 4Runner
251 Great Deals out of 33,600 listings starting at $1,995
Used Honda Accord
703 Great Deals out of 102,793 listings starting at $849
Used Subaru Legacy
144 Great Deals out of 9,564 listings starting at $1,600
Used Nissan Altima
866 Great Deals out of 61,323 listings starting at $1,000
Used Toyota Supra
48 listings
Used Toyota Soarer
2 listings
Used Volkswagen Golf
63 Great Deals out of 4,689 listings starting at $1,700

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.