besgreen Posted December 18, 2010 Share Posted December 18, 2010 my engine brake works intermittently whether the engine is cold or at operating temp., sometimes does not work at all. then all of a sudden it will start working. there is power at the solenoids......??? anyone have any thoughts on this? Quote Link to comment https://www.bigmacktrucks.com/topic/16904-e9-engine-brake/ Share on other sites More sharing options...
spud Posted December 18, 2010 Share Posted December 18, 2010 my engine brake works intermittently whether the engine is cold or at operating temp., sometimes does not work at all. then all of a sudden it will start working. there is power at the solenoids......??? anyone have any thoughts on this?got a v pump? if so back of the pump in the bowl their is a copper contact probably stuffed. Quote Link to comment https://www.bigmacktrucks.com/topic/16904-e9-engine-brake/#findComment-68694 Share on other sites More sharing options...
fjh Posted December 18, 2010 Share Posted December 18, 2010 got a v pump? if so back of the pump in the bowl their is a copper contact probably stuffed.The most common failure on these is the fuel pump switch or the above mentioned tab on older models! On The switch style one the cable is ussually what causes the problemYou may have to add and extra spring to the lever. Quote Link to comment https://www.bigmacktrucks.com/topic/16904-e9-engine-brake/#findComment-68698 Share on other sites More sharing options...
mackcl96 Posted December 19, 2010 Share Posted December 19, 2010 my engine brake works intermittently whether the engine is cold or at operating temp., sometimes does not work at all. then all of a sudden it will start working. there is power at the solenoids......??? anyone have any thoughts on this?I had one that did the same as you,,,,But mine was a short at the head (that brass rubber terminal that sends power to the rocker) Was shorting and popping the relay going down the road,,,,but never when your at the shop with a test light. Quote Thanks for hearing me out.You can have the soap box now---------JIM Link to comment https://www.bigmacktrucks.com/topic/16904-e9-engine-brake/#findComment-68762 Share on other sites More sharing options...
besgreen Posted December 23, 2010 Author Share Posted December 23, 2010 Thanks everyone for the replies. I believe I have figured it out, thanks to your input. It seems to have been the switch on the throttle linkage, cuts in & out when I tap on it. I'm replacing it & hopefully that will be the end of it. Thanks again & MERRY CHRISTMAS everyone!!!Red Dog Quote Link to comment https://www.bigmacktrucks.com/topic/16904-e9-engine-brake/#findComment-69058 Share on other sites More sharing options...
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