Doffer Posted March 17, 2013 Share Posted March 17, 2013 Every once in a while my 2003 Mack MR688S cabover truck takes about 10 seconds to start up of continuous cranking. Other times it just starts right up.Is there any way to test certain things on the engine to determine what is bad without Special Service Tools, or hooking the truck up to a computer ?What would be some good things to check out ?Thanks! Quote Link to comment Share on other sites More sharing options...
staxx Posted March 17, 2013 Share Posted March 17, 2013 Engine position sensor and cam sensor mainly the one in the flywheel housing the end of it could be covered with clutch dust and debris remove clean reinstall . Also if you have a fuel water separator make sure the check valve is ok on inlet side . Quote Link to comment Share on other sites More sharing options...
rsb502 Posted March 18, 2013 Share Posted March 18, 2013 Yeah Staxx is the man my mind went straight to the check valve on the water separator too. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
Doffer Posted March 26, 2013 Author Share Posted March 26, 2013 thanks guys, I haven't got a chance to check anything out yet. Im trading the truck in for another one tomorrow, so hopefully the mechanic will get a chance to check it over before he trades it off. Sometimes it sucks because it feels like its not going to start Quote Link to comment Share on other sites More sharing options...
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