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

1995 TOYOTA COROLLA

20,000 MILES • 4 CYL • FWD • AUTOMATIC

TOYOTAGIRL79

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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 12:39 PM

SQM

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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.

Images (Click to enlarge)

Nov 9, 2021 at 10:07 AM