1998 Toyota Celica You Advise On This That Suddenly Occured Two We

1998 TOYOTA CELICA
127,000 MILES
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ALISTAIR
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  • 1 POST
the celica is a 1.8 st. uneven and high idle speed, bad surging at low speeds. I had the diagnostic result saying "air bypass idle valve from ecu" this has been replaced but made no difference. is it possible it is the actual ecu or hopefully something simpler/cheaper? it's doing my head in as the car's been fine up to now.
Feb 25, 2012 at 1:36 PM
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DRCRANKNWRENCH
  • ✓ASE Certified Mechanic
  • 3,380 POSTS
  • ASE Certified Mechanic
I am giving you a walk through diagnsotic on the problem. It is a process of elimination step by step that goes into detail and will help you eliminate other possiblities.
Follow this link;

https://www.2carpros.com/articles/engine-surges
Feb 25, 2012 at 2:32 PM
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