bigmike9368 Posted January 2, 2017 Share Posted January 2, 2017 Hello all and Happy New year! My mechanics did an in frame on one of my Macks and now she wont start. Two days of cranking and priming and even some ether( I hate using ether) It will crank fine but no signs of even trying to start. We primed it multiple time to make sure. cracked the injector lines while cranking and we have fuel. Any ideas would be greatly appreciated! Quote Link to comment Share on other sites More sharing options...
41chevy Posted January 2, 2017 Share Posted January 2, 2017 (edited) Check the sensor on the side of the front cover for the cam. Also the ECU is very sensitive to voltage drop. Anything below 11.5 volts and it gets the lack of the will to work in some cases. Edited January 2, 2017 by 41chevy Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
fjh Posted January 2, 2017 Share Posted January 2, 2017 Check the ecu fuse ! Did it light the either off? If not Did they have the front cover off!? Is it in time? Quote Link to comment Share on other sites More sharing options...
bigmike9368 Posted January 2, 2017 Author Share Posted January 2, 2017 it did not start on either. not even a difference. we had front cover off today timing is correct where is the ecu fuse your referring to? Quote Link to comment Share on other sites More sharing options...
fjh Posted January 2, 2017 Share Posted January 2, 2017 If I remember corectly its in the little fuse box under the hood Drivers side! 1 Quote Link to comment Share on other sites More sharing options...
bigmike9368 Posted January 4, 2017 Author Share Posted January 4, 2017 So the answer to the Mystery is.......the jake brake was out of adjustment!!! Quote Link to comment Share on other sites More sharing options...
Keffer inc Posted January 4, 2017 Share Posted January 4, 2017 glad you got it fixed! 1 Quote Link to comment Share on other sites More sharing options...
gumbiegumbie Posted January 26, 2017 Share Posted January 26, 2017 the valves probably aren't set right and you are not getting compression. I would think if you gave it either all that other stuff wouldn't matter like fuses and sensors it would at least burn whatever either it sucked in as long as it has compression. Seen a lot of overheads get done incorrectly even more so when the truck has an engine brake. 1 Quote Link to comment Share on other sites More sharing options...
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