Question about 1990 Toyota 4Runner

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92 SR% Toyota

1992 SR5 Toyota 22RE fuel injected with manuel transmission. My problem is when truck is cold it seems to run good but once when it warms up I lose power. The engine will hesitate and will not go over 40 miles an hour. And exhaust smell really rich. I already checked for a plug cat. convertor. Had a resent tune up. The problem started after getting stuck in mud and broke some wires to the O2 sencor.

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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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