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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

check engine light - random

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Old 09-06-2010, 08:35 AM
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check engine light - random

My check engine light will come on about once a week or two and stay on for about a mile or less or it will go right back off. Never long enough for me to get it to my mechanic friend or to check anything.

This happened after new plugs and wires (seems to be seated good), new LCE header and cat back, new electric fan (flex-a-lite).
Truck is running great, getting 20-22mpg around town.

I was thinking, something is lose, but can't find anything.
What do you think?

Last edited by coops2k; 09-06-2010 at 08:39 AM.
Old 09-06-2010, 10:20 AM
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Check the ECU for codes.

It could be a number of things that would cause that.

Last edited by MudHippy; 09-06-2010 at 10:22 AM.
Old 09-07-2010, 04:31 PM
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Originally Posted by MudHippy
Check the ECU for codes.

It could be a number of things that would cause that.

Thanks, fond and did the jumper thing.

Oxygen Sensor Signal / Oxygen Sensor Heater Signal

Open or Short in Oxygen Sensor or Oxygen Sensor Signal

most likely my connector for the LCE header
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