stsdavew Posted February 2, 2015 Share Posted February 2, 2015 I and wondering if someone can tell me what fault code 8-5 is or is there a link where it can be looked up along with other relavent information. Thanks. Quote Link to comment https://www.bigmacktrucks.com/topic/38712-fault-code-8-5/ Share on other sites More sharing options...
j hancock Posted February 2, 2015 Share Posted February 2, 2015 For VMAC III, it indicates high voltage, low voltage, abnormal frequency or erratic data on injector #5.Could be bad connection, corrosion, etc in the wiring. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/38712-fault-code-8-5/#findComment-277112 Share on other sites More sharing options...
stsdavew Posted February 3, 2015 Author Share Posted February 3, 2015 Hmmmm is a 2003 cx613 with E7 460p a vmac III? Guess that would have helped. Sorry for being so vague! Quote Link to comment https://www.bigmacktrucks.com/topic/38712-fault-code-8-5/#findComment-277238 Share on other sites More sharing options...
stsdavew Posted February 3, 2015 Author Share Posted February 3, 2015 There is also code 3-5 that shows up intermitently under load. Quote Link to comment https://www.bigmacktrucks.com/topic/38712-fault-code-8-5/#findComment-277253 Share on other sites More sharing options...
turckster Posted February 5, 2015 Share Posted February 5, 2015 An 8-5 code is a fault with the #5 EUP, the actual problem depends on the fault FMI. It could be open circuit, short to ground or positive, abnormal frequency (most common), erratic data and so on. A 3-5 code is a fault with engine brake output #1 - the front head engine brake solenoid. Quote Link to comment https://www.bigmacktrucks.com/topic/38712-fault-code-8-5/#findComment-277505 Share on other sites More sharing options...
stsdavew Posted February 6, 2015 Author Share Posted February 6, 2015 Thanks for the replies guys! Any idea why fault code 3-5 would only show up intermitently when under load?? if im standing on the pedal there should be no reason for any current to the engine brake? Quote Link to comment https://www.bigmacktrucks.com/topic/38712-fault-code-8-5/#findComment-277672 Share on other sites More sharing options...
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