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Old 03-26-2013, 11:22 AM   #1
Drives: 02 Echo
Join Date: Mar 2013
Location: Chicago
Posts: 5
Needs some help with a very random random misfire

Hello everyone,
I have an 02 Echo ATX with 180k miles on it and thought I would join this forum because it is alot more active than some of the general toyota forums.

The car will drive completely fine with no issues, smooth shifts, pulls till shiftpoint or cutoff. Will drive fine for days and then all of a sudden it will randomly start misfiring. It only starts when the car is thoroughly warmed up, and always appears immediately upon startup if you shut if off. Unless you let a few hours pass. For example last night it was acting up. So for fun I swapped plugs and a used but tested set of coils I have. No change. Left those parts in, started it this morning. It ran and drove fine

If the car sits for a few hours or overnight the issue goes away till it starts again. I pull the plugs each time I try and diagnose it. None are ever fouled or covered in moisture, oil, etc.

I have kind of ruled out a major engine component issue because I would think if it was then it would be a constant thing.

Hoping someone else has had these symptoms and resolved them and can help me. I will pull codes next time it does it. Usually its a random misfire and maybe a specific misfire code.
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