When I press the accelerator, my car will lose power and die

1995 TOYOTA COROLLA
20,000 MILES • 4 CYL • FWD • AUTOMATIC
Avatar
TOYOTAGIRL79
  • MEMBER
  • 1 POST
When I press the accelerator, my car will lose power and die if I don't let off the gas. When it is idleing it will run smoothly, but as soon as i press the accelerator it will die. We have already changed the fuel filter, fuel pressure regulator and vaccum canister. Could it be the fuel pump or timing?
Jul 31, 2008 at 5:39 AM
Advertisement
Avatar
SQM
  • Experienced Mechanic
  • 6,383 POSTS
Hello,

It sounds like the issue is a faulty idle air control valve (IAC).
The IAC is located on the throttle body (see diagram below).
It controls the vehicle idle speed. Malfunctioning IAC can cause engine to stall at idle, sometimes when the throttle has been released.
A dirty IAC can also impact the way the engine idles.
A good first step would be to service the IAC by cleaning out all the dirt and debris buildup inside.

Here is a helpful guide:

https://www.2carpros.com/articles/idle-air-control-valve-service

I have attached diagrams including the testing procedures for the idle air control valve below.

Please let me know if you have any questions.
Thank you.
Nov 9, 2021 at 2:07 AM
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.