fjh
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Everything posted by fjh
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Pressure in expansion tank
fjh replied to wiserfrombud's topic in Modern Mack Truck General Discussion
The cup Failure thing is usually ( usually ) accompanied by HARD STARTING BUT not always . your symptom and how it is manifesting is why i am suggesting cups the under hard pull it gets worse! head gasket failures compressor failures I Am sure can happen aren't common, cup failure is better than it was .but still prevalent NOT FIXED just patched! egr cooler is still on the table as a suspect! pull the front hose and look but usually you would be throwing efficiency codes or egr related codes of some sort! -
Pressure in expansion tank
fjh replied to wiserfrombud's topic in Modern Mack Truck General Discussion
More than likly Cups! Stainless cup Did not totally solve this issue! Another bandaid attempt! At a fix! To get them thru the warranty period! -
Pressure in expansion tank
fjh replied to wiserfrombud's topic in Modern Mack Truck General Discussion
If your not having starting issues EGR Cooler is a more common issue than compressor ! cups can still be an issue if your not paying attention! Is it doing this after a hard pull or all the time? -
Nothing it’s normal ! if it’s starting fine then leave it alone!
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Maybe / maybe not http://www.truckinginfo.com/channel/fuel-smarts/news/story/2018/04/mack-plans-for-electric-refuse-truck-in-nyc-by-2019.aspx?ref=rel-recommended
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Check your fuel preasure!
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Could be the hose between the coolant manifold peices ! Very Common on a cold engine !A little more info would help! note that if the coolant has black oil in it it could have a failed engine oil cooler If it has yellowish look to it it can be a failed trans or fuel cooler If so equipped!
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Definition of crazy ! Doing the same thing over and over and getting the same result! 😠
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98 Etech E7 starts, runs for 3 seconds, then shuts off
fjh replied to Bradford's topic in Engine and Transmission
/be sure to check it the accesory relay is not dropping out when it quits check to see if the heater fan / and wipers still operate -
Vibration that 2 mechanics and Mack dealer can’t figure out
fjh replied to RobM626's topic in Engine and Transmission
Good to hear of the progress finally, definately keep us posted for the end result ! -
There torquing method is out to lunch in my mind tightening and loosening makes little sense in my mind how ever with such a wimpy bolt this method may be needed!we did some the other day we used oil! WHAT ever! any assembly procedure alterations will not totally correct a poor hold down design!
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Yup oilly! also fairly common as strange as it may seem is injector orings fuel can leak up by the injector hold down threads ! and the fuel transfer pump shaft seal can leak another semi common issue!
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Well your dealer did well turning it around quickly anyway! hopefully Mack don't wash their hands here keep making noise ! in their defense These power issues can be a bear to chase down! But if It aint right it aint right!
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Mackpro have you had any cup / injector failures on the common rail units in you area yet? Not a one here yet !
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Yes most common failure is injector cup injector seat failure
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Berry I miss the drop downs but YUP your right its a bit faster!
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How many days down ? I can see a weeks work going away here! keep the updates coming
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Bro I got to ask has this truck been having any starting issues? We have had it where the cups are starting to loose seal and it causes the unit to never finish a regen for what ever reason ! once the cups were repaired life was good! just an observation!
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Maxidye has a huge pull range to enable the use of a 6 speed trans operating range from 1150 to 1700 not uncommon econodyne needs a multi speed trans to live!
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If it were mine for the cost of a set of rings some bearings and a pan gasket while the heads were off, I would run a hone down the jugs and install new rings just sayin! Never saw pressure blowing out of a front Teflon crank seal. ( me neather) Also if the bloby is worse under power it can be a turbo seal issue also very common with the AI and some AC turbos! We also have several trucks running around with the cooler blocked off totally no coolant running thru or egr they perform OK ! sumthing to think on! be sure to replace the rocker bolts in any case
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the most hp E7 mechnical engine you will find is 400 , real small window 3 years maybe! after that mostly electric 427 454 electronic only
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The sex slave valve was mounted on the fuel rail incoming line on the older first gen engines yours may not have it' it was done away with after a few years! In my opinion as long as your ecu fuses are good and the connections at the firewall pass thru are good no worn thru wires ect: you need to pull the pump and have it repaired! the rack controller is likely toast!
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The elab valve engages with the turn of the switch the engine should run with out the rpm sensor it will not run without the timing event marker on the pump but will throw a code and the check engine light will be on for both i believe ! Most often By what your describing the rack control has gone west in these cases the pump has to come of and sent to a Bosch Fuel pump shop and parts replaced!
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I would be squealing pretty loud about that! If they plan on doing R AND D on your head and valves the truck could be down for two weeks or more ! they need to supply the dealer with a new head out of the box MIN and just put it on there Ive seen this shit happen before ! I would recommend you make lots of noise!!
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Yes Injector harness issues have happened the harness is all one piece!
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