Sudden acceleration

1994 MERCURY COUGAR
32,000 MILES
Avatar
LIZ VIDRIO RIOS-BRETZ
  • MEMBER
  • 1 POST
My car will suddenly rev up while I am driving about 40 to 60 MPH. It will go to about 4-5 rpm's. It will go in for a few seconds can and can not be at same time as when the car down shifts, it will then go back to normal. The first time it happened was on a record heat day. I was running the air conditioner, but temperature gauge was normal. I may add that I live in the desert and it gets about 115 degrees.
Jul 3, 2016 at 3:22 PM
Advertisement
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
check transmission fluid it may be a transmission problem. if fluid is dark brown or black or discolored have a transmission professional look at it.
Jul 3, 2016 at 4:16 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.