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I have a 2003 mack MR truck. 2003 Mack Mr truck E-7 engine.
2003 Mack Mr truck E-7 engine. Problem with truck stumbling some. Inactive code keeps coming up no 3 eup. and data link. Active code is fan clutch output which I assume wouldn't cause truck not to take fuel at Times and then pkup again. I have replaced number 3 eup and injector nozzle. Also replaced transfer pump and cam sensor. Wiring seems good. 4 volts going to every eup and pulse is the same on every eup. Haven't programmed rip but was told rarely that is a problem and I have swapped eup before never a problem. I have. Good software that trouble shoots coded and solutions. At a loss. Have own macks. 30 yrs. … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
I have 2003 Mack Mr truck and truck missing randomly. I have
I have 2003 Mack Mr truck and truck missing randomly … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
Cooling fan wont disengage 2002 mack. 2002 mack rd688s e7
Cooling fan wont disengage 2002 mack JA: What's the make/model/year of your truck? Engine type? Customer: 2002 mack rd688s e7 inline 6 JA: Are you fixing your truck yourself? What have you tried so fa… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
Well its an 01 mack rd688s triaxle dump. sometimes make
well its an 01 mack rd688s triaxle dump. sometimes make 19psi sometimes makes 24psi. no rhyme or reason.has codes with a vague definition on the launch code reader. … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
2007 Mack vision. Mack 2007 vision fan clutch comes on for
Mack 2007 vision fan clutch comes on for one to five seconds along with lightning bolt light on dash.it also derate power. This problem comes and goes randomly. Any idea on how to fix. Thanks … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
We have a 1996 ch613 Mack that has had the motor change out
Hello we have a 1996 ch613 Mack that has had the motor change out it now has a 1993 model motor. They both had the EM7 V-MAC II Mack motor. It ran good for close to a year then it started missing then… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,738 satisfied customers
I have a 2012 388 Peterbilt. The fan stays on constantly.
I have a 2012 388 Peterbilt. The fan stays on constantly … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
06 Mack cv713... vin ***************** I HAD 2 INACTIVE
06 Mack cv713... vin ***************** I HAD 2 INACTIVE CODES... one was low coolant... filled cleared; ok My other tech said it had the lightening bolt light on... I started and ran, no light... I ha… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,431 satisfied customers
Have a 2007 Granite with AI427 keeps throwing 3-1 code
Have a 2007 Granite with AI427 keeps throwing 3-1 code replaced exhaust temperature sensor still throwing same code … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
X. 2003 mack RD688s e7 etech 350 engine. Will not start, it
2003 mack RD688s e7 etech 350 engine. Will not start, it only cranks. I have eliminated any problem from the fuel tanks. I have a line running from a separate fuel container. I've replaced the Crank sensor and the Engine speed sensor. still no luck … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,536 satisfied customers
I have 2001 Mack Cx613 1m1ae07y81w010002 cooling fan will
I have 2001 Mack Cx613 1m1ae07y81w010002 cooling fan will not turn on changed fan switch I can ground switch fan comes on. Has apads system on truck … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,431 satisfied customers
07 Mack MR688P trying to diagnose air operated radiator fan
07 Mack MR688P trying to diagnose air operated radiator fan clutch. Fan runs 100 % all the time, can ground solenoid and will shut off.… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,431 satisfied customers
I have a 2004 Mack vision cx613 with low power and a fault
I have a 2004 Mack vision cx613 with low power and a fault of spn85 fmi 4. Checked wire for rubs at module on passenger kick panel. I am having trouble finding the right schematic of the wires. My sch… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,431 satisfied customers
2002 freightliner with cummins ISB 245. have an active code
2002 freightliner with cummins ISB 245. have an active code for 5V supply voltage to ECM. all the sensors that run off of the 5 V supply are fine and throwing no codes for them. engine is derating and… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
2007 INTERNATIONAL 8600 WITH CUMMINS ISM, FAN CLUTCH STAYS
2007 INTERNATIONAL 8600 WITH CUMMINS ISM, FAN CLUTCH STAYS ENGAGED, NEED TO KNOW WHERE RELAYS TO FAN CLUTCH ARE. I ALSO WOULD LIKE TO KNOW WHAT TO TEST, AND WHAT CONTROLS THE ENGINE FAN CLUTCH, I KNOW… read more
Toby
Toby
Vocational, Technical or Trade Scho
107 satisfied customers
I have a 01 Mack CH613, it has the super ten electronic high/low
I have a 01 Mack CH613, it has the super ten electronic high/low range shift, the transmission computer went out or so the dealer we bought the truck from said so. the red light on the shift knob cont… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,738 satisfied customers
g,day .I have CHR MACK VMAC2 having trouble with the viscus
g,day .I have CHR MACK VMAC2 having trouble with the viscus fan hub the orignal one is in all the time brought a new one it wont engage at all only when you first start it i,ve flushed radiator etc re… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,431 satisfied customers
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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