Timemachines Posted December 28, 2015 Share Posted December 28, 2015 (edited) Hey guys looking for some advise. Working on a 2006 cv-713 that has a Aset engine. Truck was driving down the road and started this out of no where.Truck fires up normal runs good for 5-10sec, then you loose all throttle response and will idle very poorly around 300-400rpm and then sputter out like its out of fuel. Will then fire up and do the same symptoms each time. Truck has no codes, perfect fuel pressure (65-70psi, even by passed fuel system to eliminated a clog), new fuel filters, seven main engine mounted sensors all reading good. have swapped out ecm for known good one from Mack Dealer, Engine Position Sensors Ohm test good, tps reading smoothly. Edited December 28, 2015 by Timemachines Quote Link to comment Share on other sites More sharing options...
Challenger Posted December 29, 2015 Share Posted December 29, 2015 Maybe an engine brake solenoid sticking open or a cut oring for the solenoid. Start the truck and watch the oil pressure gauge. Does the truck start to shutdown when the oil pressure goes up? Since its shutting down with in a few seconds, this could be the amount of time it takes to build oil pressure. And with a bad engine brake solenoid or split solenoid oring, once the oil pressure builds up it could be bogging the engine down to shut down. In this case you would have no codes and good fuel pressure.If engine is shutting down when oil pressure is building-Remove both engine brake solenoids and check the orings on the solenoid and the one that sticks in the rocker shaft. If you find a cut oring, replace orings and recheck. If you dont find a bad oring it could be a bad solenoid. Only way to know is replace both solenoids with known good ones or gamble and replace them. Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 29, 2015 Author Share Posted December 29, 2015 sounds good, will look into it and let you know thank you Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 29, 2015 Author Share Posted December 29, 2015 (edited) removed both solenoids, orings look to be in good shape. It seems the check ball at the bottom isnt fully seated you can move it up and down slightly does not seem to be stuck etc, is that normal Edited December 29, 2015 by Timemachines Quote Link to comment Share on other sites More sharing options...
Challenger Posted December 30, 2015 Share Posted December 30, 2015 Did you run the truck to see if its shutting down with the oil pressure? If its shutting down with the oil pressure it could be a solenoid. I didnt expect you to find a bad oring, that would have made it to easy. And you know it cant be easy. Assuming it shutdown with the oil pressure going up, I would replace both solenoids. Im not sure about the check ball you are referring too, Im drawing a complete blank. Compare them together, are they both doing the samething?I should have already asked this, Is it a Jake brake or Power leash engine brake. Jake brakes have the jake housing, a valve cover and spacer that the the valve cover seats on. Kinda looks like 2 valve coversPower leash just has 1 valve cover per head and the just a rocker shaft with a solenoid. Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 30, 2015 Author Share Posted December 30, 2015 it seems like its shutting down like that yeah and its a Power Leash System. Although did get two new solenoids with orings and installed them. Still the same Quote Link to comment Share on other sites More sharing options...
Challenger Posted December 30, 2015 Share Posted December 30, 2015 Just to make sure. There are 2 orings for each solenoid. One on the solenoid and one fat oring that goes on the end of the solenoid and goes down into the rocker shaft. The fat oring is sold separate from the solenoid. Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 30, 2015 Author Share Posted December 30, 2015 yes got both Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 30, 2015 Author Share Posted December 30, 2015 i carefully installed the two new solenoids with new orings on each and seems to runs worse now. fires up and goes right to 200-300 rpm idle. no throttle response Quote Link to comment Share on other sites More sharing options...
Challenger Posted December 30, 2015 Share Posted December 30, 2015 Unplug the solenoids from the outside of the valve cover and run the truck. This will just make sure there isnt power going to the solenoids. Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 30, 2015 Author Share Posted December 30, 2015 checked for voltage and unplugged them. no change Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 30, 2015 Author Share Posted December 30, 2015 besides this I have been all over this truck checked everything. ecm powers and grounds, fuel pressure and volume, engine position sensor ohms and air gaps, swapped in 2 different ecms, replaced engine brake control solenoids and orings, parameters all reading good on prolink no codes. as it would run long enough before now I had cracked injection lines from EUPs to see if fuel was present while running and all six were even. Note also its not blowing any excessive smoke from the exhaust. Quote Link to comment Share on other sites More sharing options...
Challenger Posted December 30, 2015 Share Posted December 30, 2015 You gave a good description of the problem and already eliminated possible problems. Im stumped, lets see what others think. Quote Link to comment Share on other sites More sharing options...
Timemachines Posted December 30, 2015 Author Share Posted December 30, 2015 also replaced fuel supply pump, had removed and inspected it and found the rotor in the pump had play and was digging into the housing. i wouldnt say that that effected anything in terms of metal possibly making its way through the filter and into the EUPs. Quote Link to comment Share on other sites More sharing options...
staxx Posted December 30, 2015 Share Posted December 30, 2015 Is the turbo seized ? Or muffler blocked ? Intake piping getting sucked closed ? Quote Link to comment Share on other sites More sharing options...
Kansas farmer Posted December 30, 2015 Share Posted December 30, 2015 There was a guy around here that picked up filters for his truck and he opened the air filter box and threw some in there and forgot to get all of them out. Long story short he sucked the centrifuge filter into the intake tube. Just a thought might be something as dumb as that. Good luck. Quote Link to comment Share on other sites More sharing options...
Timemachines Posted January 5, 2016 Author Share Posted January 5, 2016 (edited) Intake is clear, hit a wall couldnt figure it out boss sent it away to the dealer. will let you know what they say Edited January 5, 2016 by Timemachines Quote Link to comment Share on other sites More sharing options...
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