help with jakebreak

Jun 3, 2011 #1

i have an 06 500 hp isx.the jake only works on 2 and 4 not 6 anything i can check ??????

driver1189, Jun 3, 2011

#1

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Jun 3, 2011 #2

start with fault codes, then go on with ECM input signals... what a truck? if Volvo, check VECU for codes too.

Pablo-UA, Jun 3, 2011

#2