Bolt sizes for the EGR, are M8x125 and the lengths vary, should be a nut on stud for one of the three.
Code 6: for 87' is the igniter circuit. Double check connections from the ECU to igniter (3 wires going over valve cover). Also check the connection for the pickup coil going to the distributor. Went through this recently with a fella who had a 90's 22R-E...turned out his ECU-igniter wiring rested on the exhuast at some time and burned a wire.
-------------------- 88' 4x4 *22R-EB Gen II*
87' $Runner *22R-EB Gen I*
85' Sillyca 22R-Esq
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