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ECU Codes code 21 how to read.. Ignition Signal
I have a 92 D21 4x4 etra cab truck...I need help reading the ECU code..
What part to replace when you get the 21 code in mode 111 on the ecu..
My truck has run horrible ever since I did a tune up and changed the fuel filter.
I did have to pry the rotor off, after the tune up complete I drove the truck 10 miles, well now the truck will not run. it will idle but runs real rough and misses.I checked the wires etc,, all correct.. the mechanic said the fuel is too rich and my ECU need replaced... the trouble code reads 21 in mode 111... I want to fix this truck myself.
Please help
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