mcratchet1
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Everything posted by mcratchet1
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Intermittent injector codes
mcratchet1 replied to mcratchet1's topic in Modern Mack Truck General Discussion
Ok thanks for the advice -
Intermittent injector codes
mcratchet1 replied to mcratchet1's topic in Modern Mack Truck General Discussion
Well I think I found the problem brittle wires and coating coming off in wiring harness right where it bends over air compressor. The harness is a complete engine harness. 1800. Anyone replaced one before? Just wondering if I should try to do it I called Mack they charge 12 hrs for it at 195.00/hr -
Intermittent injector codes
mcratchet1 replied to mcratchet1's topic in Modern Mack Truck General Discussion
I got cover pulled I do not see any damaged wires or looses plugs. What would be the next thing to check
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Intermittent injector codes
mcratchet1 replied to mcratchet1's topic in Modern Mack Truck General Discussion
Ok thanks, this is my first mp8 I have had all e7 past 20 years. The blowby tube that comes out of cover. Does that twist out or take the cover off with it
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Intermittent injector codes
mcratchet1 replied to mcratchet1's topic in Modern Mack Truck General Discussion
Doing that right now the guy a bought the truck from a year ago had all 6 injectors replaced beginning of 24. I don’t know if cups were changed. -
Hey everyone so I have another strange issue. 2013 mru 613 mp8 motor Driving truck back from job and felt it missing and losing power. At shop checked 2 active codes injector 1&3 open circuit. Shut truck off to cool ate lunch. Started truck up to move and it’s running perfect no more miss or active codes. Is this maybe a short or damaged wire to injector harness? Any help would be appreciated just don’t want to get stuck somewhere
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Ok plug at radiator and connect the lines together there right?
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Got a 13 mru t310 tranny cooler must have a small leak low on coolant and oil is turning milky after a months use. My question is can I cap of lines and not use cooler? I have same setup in a 07 no cooler on trans.
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Trying to find a salvage yard where I could buy a grille and headlight beasels for a mru 613
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Egt sensor location
mcratchet1 replied to mcratchet1's topic in Modern Mack Truck General Discussion
Code was sid 243 fmi 7 -
So I had a fuel leak today the hose coming off fuel rail to that little aux pump in pic. I’m assuming this is for scr system. The hose has been rubbing a long time it looks like. Could this been the cause of all my issues? I guess I can soak it down with hose and try.
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Hello can anyone point me in the right direction of egt sensor on a 2013 mru cab over. I’m getting a fault code one it. Are these sensor prone to failure or the connector? Thanks!!
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Thanks I’m going to check it out very thoroughly today
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Ok, I checked all the banjo bolts on fuel lines and found the ones on fuel pump loose. Idk if that has anything to do with it. If loose seems like they could suck air unless water changes this issue. But that’s above my paygrade. I’m new to these electronic emission trucks. Thanks!
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Hello, I have a strange issue with my 2013 Mack mru with mp7 engine. I was pumping in the rain and truck try to kill four different times. Rained stop no problems came back to shop. Getting a pid94 fmi 7 code. Pulled truck up and degreased around fuel filter area. Try to start truck it crank and ran about 1 minute and stalled. Would not start up. I took my blower and dried the whole drivers side engine and then it started right up. So is there a sensor issue or wiring intruding water that would stop truck from starting. Just trying to get an idea where to start looking. Thanks
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Ok thanks I’ll give them a shout
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I have a 2013 mru 613 the small radiator that sets behind driver side is leaking on the seams. Does anyone know a good aftermarket one or a good place to buy salvage? For a new one Mack wants $5500.00 this blows my mind. It’s 18”x36”part #21199385 thanks!
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I’m assuming this is probably an ecu issue ?
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So I changed that green ac switch the fan is now working properly. But now if you turn ac on the fan stays engaged all day
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No it’s not broke but yes seems to wobble when clutch is engaged. The problem I’m having is it stays engaged 75% of the time. As soon as I leave in the morning
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Ok finally checked it out blowing air does dis engage clutch. I have air going into that air switch but no air coming out. I have power but no ground. When I add a ground everything works. Checked wire to harness I do not see any issues. Does anyone know where the ground comes from? Also does that air switch disengage with ground or power? I also added a video does it look like clutch has to much wobble? IMG_8323.mov No when I shut off key fan stop almost immediately. That’s with clutch disengage. Also when I unplugged ac line switch the clutch engaged. The truck is cold so it should not engage.
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Ok finally checked it out blowing air does dis engage clutch. I have air going into that air switch but no air coming out. I have power but no ground. When I add a ground everything works. Checked wire to harness I do not see any issues. Does anyone know where the ground comes from? Also does that air switch disengage with ground or power? I also added a video does it look like clutch has to much wobble? IMG_8323.mov
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Sorry it is an mr688s it’s off in the morning for just a few mins then stays engaged the rest of day until just idling at shop but temp never goes over 180 if I remember correctly it only engages when temp hits 200
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I have an 07 mr688s with a Horton pneumatic fan clutch. Having issues with it constantly staying engaged. What’s the best way to diagnose if it’s a faulty sensor or bad clutch? Thanks in advance
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Ok got it I’ll clean it up and pull top cover of transmission thanks
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