Mackpro
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Everything posted by Mackpro
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There are so many passage ways inside the filter stands on the MP engines, it would be hard to bypass the primary side of the fuel filter stand. We talked about changing a fuel filter stand on here yesterday and guess what I had to do today? Yep , filter stand. We have 2 CXN’s , 3 CXP’s and about 18 CXU’s and one Anthem. Had low fuel pressure in one of the CXU’s . There was something going on inside the filter stand. Start to finish a little over 3 hours. Including troubleshooting, r&r filter stand, pressure wash before and after repair and test drive with laptop plugged in .
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5 mph derate?
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Shouldn’t have anything to do with the Allison ecm. If the pto light in the dash cluster ( has to be the one in the cluster) is on , then the VECU should be getting the “ PTO on” signal and operate as per the Pto parameters that were programmed in the VECU ( Vechicle control unit) . Only thing I can think of is , some sensor has failed or sending incorrect into to the VECU. Make sure the parking brake and stop light switches are working correctly.
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On a Friday afternoon at 4:00 , yea I can do one in an hour! Lol. For a first timer , 2-3 hours. The skinner you are the easier it is.
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Gotta change the whole thing. No special tools really, stubby wrenches help. Just be sure to put the lines and fittings back in the same place. One fitting is actually a check valve and it will also fit in other places and cause problems. The primer pump is replaceable on the newer common rail engine
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REGEN with engine brake Fault????
Mackpro replied to fjh's topic in Modern Mack Truck General Discussion
Sure it’s not parking brake code? I’ve had a few cut out in the middle of a regen due to intermittent parking brake sensor issues -
Help with Ecm V Mac II ? E7 350
Mackpro replied to dexter860's topic in Modern Mack Truck General Discussion
In 1995 VMAC 1 ( 2 ECM) and VMAC 2 (1 ECM) as well as mechanical engines were available. Yours is a VMAC 2 . The ECM’s are no longer available new or Reman. The part numbers are still in the system but no stock anywhere. Your M5 ecm was the first version the it superseded to a 56M6 then 59M7 then M8 then on through 3 Volvo part numbers . A dealer should be able to reset the tire size and gear ratio to match your truck as the ecm is still going off programed data of the truck the ecm came out of. -
Can anyone decode this?
Mackpro replied to Vac-Daddy's topic in Modern Mack Truck General Discussion
Also this truck has both power divider lockout and interwheel diff locks. Should do good off road -
Can anyone decode this?
Mackpro replied to Vac-Daddy's topic in Modern Mack Truck General Discussion
The AI engines are not known for being powerful ( regardless of HP rating) . However they are pretty reliable. Compared to 2008 and up trucks, you won’t be stuck on the side of the road doing regens or in 5 mph derate due to emissions. So that’s a big plus. -
Does the PTO light in the dash cluster come on when the pto switch is engaged? Also is this a Allison trans?
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Can anyone decode this?
Mackpro replied to Vac-Daddy's topic in Modern Mack Truck General Discussion
It’s a AI460 engine with a Mack T318LR trans. Meritor rear axles with 4.56 gears. Some type of walking beam rear suspension. Powerleash engine brake. Has dual steering gears. Being built on 3/23/2006 it should have most all upgrades done at the factory. Only thing not possibly done is the rocker arm hold down bolts upgrade. Mack/Volvo purged all warranty data on anything with a grey motor in it a while back. Not able to view past warranty history. -
I’d say the pros for the VMAC electronic engine is better cruise control, PTO speed control, road speed limit for fleets, better cold start ability, less smoke, engine protection from low oil pressure/high coolant temperature , easier to calibrate speedometer for gear and tire size changes and the list goes on. On the negative side would be engine harness, sensors and ECMs that could randomly fail leaving you on the side of the road. Also then inability to easily turn the fuel and rpms up for more HP/speed.
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If MP7, the oil thermostat actuator on the oil filter stand is probably bad and possibly shorting out other sensors. We change a lot of them.
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Mack now uses the OBD connector starting sometime in 2013. I believe some engine makers still use the round 9 pin connector though (Cummins). I saw a 2019 Mack GR with a Cummings in it and it had a round 9 pin connector for the engine and also the rectangle OBD connector for the vehicle ECU.
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Some have a check ball in the elbow fitting at the sure tank . Usually the 2004 and up ASET engines have them . The problems occur when the check ball sticks
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Is your radiator cap on the radiator or do you have the expansion /surge tank on the firewall? If you have the expansion/surge take set up, I’d check/replace the small line from top radiator hose to the expansion/surge tank. We have seen these collapse inside and cause all kinds of weird problems.
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Make sure the heat shields over the EECU are intact and not missing. Yes, you have a ETECH VMAC 3 . Being a RD If you have frame mounted fuel filters near the EECU make sure your motor mounts are not bad/damaged. If so , under a hard pull or going off road can allow the engine to lean over and the fuel filter stand can hit the EECU and all it takes is a tiny dent and it’s toast.
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There about 4 different injector kits for the MP 8/ D13 excluding the common rail engines. It goes by emissions year. From what I remember there a kit for the 2007/08(DPF ) , 2010 emission (DEF) , 2013 OBD and one for the 2016 GHG engine. They will all physically fit and go in the engine but all have different part numbers.
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The VECU stores and computes lots of info. Mileage, tire size , rear axle gear ratio, transmission type, transmission top gear ratio, pto rpm settings, throttle position, cruise control speed , road speed limits, and sends data to the dash if you have a electronic dash and also stores the VIN number . Most VECUs have the same part number except for the last couple of numbers. They end in M-1 through M -22, some cross and some dont. They can be reflashed to the correct Vin if the part number crosses to the original part number
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You need the VECU . Those also failed like crazy due to the leaking windshields of the R series and the way they are mounted from the factory
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Is it in a RD? If so, early RD’s with ETECHs were know to fry engine ECM’s a lot . The engine ECM’s were bolted to the RH side of the block , when the front and rear motor mounts would wear out the engine could lean enough when going off road or in a hard pull and the frame mounted fuel filter stand would hit the engines ecm and barely dent it and it would fry. Seen it a bunch. If this is the case , check or replace the front and rear motor mount rubbers and bolts
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From what I remember the Original style ETECH engines came with 60 psi overflow valve, there latter came a 100 psi valve that solved some rough idle issues in a few UPS trucks we saw. The ETECH overflow valve has a barb on it for the plastic fuel return lines from the head/injectors. This is a easy way to tell a ETECH engine from a CCRS/ASET engines. Plastic line= ETECH. No plastic line =CCRS/ASET. Starting in 2002 with the CCRS on through the to end of the ASET engines the the fuel valve opened at 60 psi. So fuel psi should be at 60 + at idle and go up as rpms increase. If psi goes down as rpms go up you got a problem.
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12MS517BM is usually current part number for a 99-01 ETECH engine ecm. We used to reflash used ones and put the correct data in then to match the truck/engine. As long as it was a ecm part number that interchanged with the original it would work. Mack still has plenty of Reman ECM’s for the ETECH (VMAC 3) style engines . However VMAC 1&2 are not looking good. A Reman ecm also comes only with a basic data in it for the engine to run, usually about 250 HP. You gotta get it flashed to match your original engine.
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It does nothing but turn the light on in your case. However. On a 2010 and up with DEF system, it’s a big deal if there is a issue.
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We have a local guy doing deletes here with good results. At least 15 Macks that I can count. The trucks all stay local or within 150 miles of here. There are no DOT emissions testing requirements around here so it’s kinda “Don’t Ask /Don’t Tell”. Only problem we had was when changing over the Borg Warner Cool logic fan clutch to the new style fan clutch, you have to reflash the engine ECM for it to work correctly. This wipes out the delete program so the customer has to go back and get it re-tuned. The corporate fleet I work for now is all Mack so no deletes but they buy the maximum extended warranty and it sure pays for itself.
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