Question about 1990 Toyota 4Runner
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Posted on Jan 02, 2017
SOURCE: 92 SR% Toyota
That's probably the problem the broken wires. The 02 sensors send a rich/lean signal to the ecm. If they aren't working right, a lean or rich situation will occur. Best to get the wires fixed. If the wires broke off at the sensor, need to replace it.
Posted on Jun 15, 2009
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