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I have a 1994 Mack CL713 dump truck with E7-400 engine. The truck has been some issues for the last 4 months or so. It will intermittantly start to miss, and sometime will be very low on power. I replaced the injectors, didn't help. Now I am thinking it is an electrical issue with the injection pump or control module. I am wondering if anyone can suggest a scan tool that would work on this old of a truck. I have not been getting any blink codes, but am wondering if there are codes stored in memory, that cannot be seen unless hooked to a scanner. Thanks for any help.


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