It was indeed helpful, I didn't conclude my apprenticeship though I studied mechanical engineering at university( automotive plant & maintenance option)
I know this isn't the best place to get advice but hopefully someone has an answer. I have a mack E7 Econovance with the electronic throttle/rack control. The crankshaft thrust washer broke and the crankshaft endplay was so great it wiped out the rpm/tdc sensor and damaged the block. I swapped the engine out for a used engine, replaced the TDC sensor and replaced timing event sensor. Now, I'm not getting fuel to the injectors. Primer will push fuel through the injection pump and back to tank, and cranking it will push fuel through pump and back to tank but it will not deliver fuel to the high pressure fuel lines. It won't start and I can't even bleed the high pressure lines. I have ~3v and good ground to the fuel rack actuator with the key on. I can hear the rack open when I put 12v and good ground to the rack actuator but still can't get fuel to the high pressure lines/injectors. Is there a separate fuel shut-off solenoid in the electronics assembly in the rack? As far as I can tell the only other electronics in there are rack position sensors. I'm baffled that even manually opening the rack with 12 volts won't let me bleed fuel to the injectors. I'm lost on this one.
@@JimMackHeavyEquipment I have a 2002 mack vision sleeper truck that won't build oil pressure I changed oil pump and oil pressure sensor truck well start run fine for 30 seconds shuts off due to reading no oil pressure well start right back up run fine shut off again. Thanks I appreciate your help.
@@keepontruckinoutlawlife1248 Have you hooked up a manual pressure gauge to confirm that it is really 0 psi oil pressure in the engine? That is usually the next step before we start tearing things apart. It makes me wonder since you say it runs fine. If the manual gauge has pressure then it is a problem with the sensor side. I know you replaced the sensor but it could even be the wiring or ECM. If the engine truly doesn't have oil pressure then that would be a different investigation.
Nice video,i have an rd688s mack 1995 with an e7 semi electronic,it used to work great but now it can't be starded if it finally start it won't stay working for a long period
Very interesting video. Exclusively for mechanical engineers.
It was indeed helpful, I didn't conclude my apprenticeship though
I studied mechanical engineering at university( automotive plant & maintenance option)
Muy original... Y claro
Excellent
I know this isn't the best place to get advice but hopefully someone has an answer.
I have a mack E7 Econovance with the electronic throttle/rack control. The crankshaft thrust washer broke and the crankshaft endplay was so great it wiped out the rpm/tdc sensor and damaged the block.
I swapped the engine out for a used engine, replaced the TDC sensor and replaced timing event sensor.
Now, I'm not getting fuel to the injectors. Primer will push fuel through the injection pump and back to tank, and cranking it will push fuel through pump and back to tank but it will not deliver fuel to the high pressure fuel lines. It won't start and I can't even bleed the high pressure lines. I have ~3v and good ground to the fuel rack actuator with the key on. I can hear the rack open when I put 12v and good ground to the rack actuator but still can't get fuel to the high pressure lines/injectors.
Is there a separate fuel shut-off solenoid in the electronics assembly in the rack? As far as I can tell the only other electronics in there are rack position sensors. I'm baffled that even manually opening the rack with 12 volts won't let me bleed fuel to the injectors. I'm lost on this one.
Think Mack!
I am getting fuel in the oil pan.
Would anyone know where I could find a video like this for the etech engine
why we should use handbrakes in tests or its for pressure? are the handbrakes influence pressure?
Parking brake air circuit controls air supply to the reversing relay.
You know anything about the mack E7 engines?
I know some and have some manuals, what are you looking to find out?
@@JimMackHeavyEquipment I have a 2002 mack vision sleeper truck that won't build oil pressure I changed oil pump and oil pressure sensor truck well start run fine for 30 seconds shuts off due to reading no oil pressure well start right back up run fine shut off again. Thanks I appreciate your help.
@@keepontruckinoutlawlife1248 Have you hooked up a manual pressure gauge to confirm that it is really 0 psi oil pressure in the engine? That is usually the next step before we start tearing things apart. It makes me wonder since you say it runs fine. If the manual gauge has pressure then it is a problem with the sensor side. I know you replaced the sensor but it could even be the wiring or ECM. If the engine truly doesn't have oil pressure then that would be a different investigation.
@@JimMackHeavyEquipment I haven't as of yet
Nice video,i have an rd688s mack 1995 with an e7 semi electronic,it used to work great but now it can't be starded if it finally start it won't stay working for a long period
Anyone what year this is from?
The best I can tell it is from somewhere around 1999.
These videos were pre 1995
@@Mrbbigrig How can you tell? I think Vmack came out in 1995, same with econovance
@@robwhite3241 Vmac came out in 1990. 1995 had changes made to the fuel system that are not in the video
@@robwhite3241 the engine and fuel system changed again in 1998 for vmac3
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My E7 in my old boat years ago: ruclips.net/video/exAbEkcAUMA/видео.html
My E9 in my new boat currently: ruclips.net/video/Bsh3qnupyv8/видео.html
Very cool, thanks for sharing.