(1994 toyota previa - 2.4L DOHC)
This toyota was sitting up for months after it overheated and blew the head gasket. The head was given a valve job and reinstalled.
The van idles/drives GOOD when warm, but idles very rough and dies when cold.
After it warms the engine light comes on. (OBD 1)
Spark plugs and wires have been replaced.
Would antifreeze in the exhaust ruin the O2 sensors and cause this problem?
I am afraid it is off timing.
Any suggestions?