Medium and Heavy Trucks

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I have a 2007 Kenworth T800. The secondary air pressure
Hi. I have a 2007 Kenworth T800. The secondary air pressure gauge sweeps with the primary gauge when you turn the key on as they should. The primary gauge then reads whatever is in the system, but the… read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
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2007 Kenworth W900. New style dash. Cruise doesn't work.
2007 Kenworth W900. New style dash. Cruise doesn't work. Replaced both cruise switches and parking brake switch on air block on firewall. Computer is showing service brake on. What's causing this?… read more
Nich1019
Nich1019
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Speedometer not working. 07 387 peterbilt. Last 6 of vin is
Well brought it into butler cat and they put in a new ecm and programed it to the truck. New speed sensor, wires, speedometer head. Cat et reads the speedometer is working but the speedometer doesn't move and sometimes bouces around. I haven't found any schematics that show the wires coming out of the ecm for the speedometer. Schematics for the electrical on this truck are horrible. … read more
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2005 cat c13 kcb36279 crank no start. inframe was just done
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TomcM28
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The speedometer was bouncing around then quit check engine
the speedometer was bouncing around then quit check engine light cane on not sure were to start any help would be appreciated … read more
Daniel Wilson
Daniel Wilson
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Western star 4900 2004 EGT gauge not working brand new wired
Western star 4900 2004 EGT gauge not working brand new wired under the cab and gauge connected. Will not work.… read more
timdieseltech
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lead diesel tech, shop owner
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I have a heavy equipment shop. And i got a 2014 freightliner
Hi there my name is***** have a heavy equipment shop. And i got a 2014 freightliner M2106 VIN #EHFP7942 It came in my shop because the speedometer said it was going 75 MPH but was actually going 35 MP… read more
Wayne
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I have a cat 262C skidsteer that the park brake won't
I have a cat 262C skidsteer that the park brake won't release on... … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
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I have a 2000 western star with a n14 it started missing
hello I have a 2000 western star with a n14 it started missing then smooth out after speeding up I took it and had a laptop ck it out and #3 was not hitting I replaced it with a reman cummins injector… read more
cumminsdr
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I have a 4900 vin is LH225600 4x2 with a two speed rear.
I have a 4900 vin is LH225600 4x2 with a two speed rear. Does anyone know what to set the dip switches to in the dash ciuster? It has 22.5 tires - 5 speed trans - DT466 eng. The tag is missing on the … read more
Wayne
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I m having problem with speedo meter on freightliner
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Cat Man
Cat Man
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I have an 03 KW T600 with a Cat engine. Our ELD recently
I have an 03 KW T600 with a Cat engine. Our ELD recently stopped reporting the odometer on this truck right at exactly 2,000,000.0 miles. I checked with the ELD provider and they do not stop at 2 mill… read more
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Very low engine power, low turbo boost, no codes present after changing two injectors and
Very low engine power, low turbo boost, no codes present after changing two injectors and the intake actuator harness. Removed the four injectors and installed new o-rings. Replaced turbo boost sensor… read more
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Cat Man
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i am working on a cat 3176 in a 1996 pete 357. i replaced a
i am working on a cat 3176 in a 1996 pete 357. i replaced a cracked timing housing and now engine wont start... I checked the voltage of three fuses inside dash (i'm assuming they are the ecm fuses) i… read more
Daniel Wilson
Daniel Wilson
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is their anyway to test the timing transducer? its an mxs cat,
is their anyway to test the timing transducer? its an mxs cat, pin#36 is yellow and #26 is the white wire in the p2 connector. probe is in drivers side of block, 1100rpm, cat et keeps telling me unsuc… read more
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Cat Man
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I have a 98 kw w900 with 3406 e it missed a little then ran
I have a 98 kw w900 with 3406 e it missed a little then ran horrible now wont start at all took ecm to cat tested fine they said one fault was intermittent power but it has proper voltage to ecm from … read more
Daniel Wilson
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dddl6.45 I had 11r24.5 tires and now it has lp 22.5 tires how
dddl6.45 I had 11r24.5 tires and now it has lp 22.5 tires how do I set this in the computer so everything will read correctly?… read more
Cat Man
Cat Man
Cat Engine Expert
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2005 Peterbilt 335 with a C7 Caterpillar 250hp. Low power
2005 Peterbilt 335 with a C7 Caterpillar 250hp. Low power afer about 5 minutes of running unloaded. First 5 minutes it has plenty of power, starts to sputter a bit and then has very low power. In the … read more
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Cat Man
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

10,344 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

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Technician turned service manager on multiple lines of trucks and engines, used in industry.

cumminsdr

cumminsdr

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All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 satisfied customers

24 years of experience diagnosing & repairing

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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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