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Related Medium and Heavy Trucks Questions
I have a 3126 cat. Code 164-11. I've replaced 6 pack
I have a 3126 cat. Code 164-11. I've replaced 6 pack injectors, oil pump, ipr, injection pressure sensor. Still no start. Spray a very little starting fluid. Start up good. Only. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
99 3126 cat no start. Have 2 identical trucks, been swapping
have 2 identical trucks, been swapping parts, swapped ecm, injectors, has new high pressure pump, 950 psi oil pressure while cranking, new sensor harness, new rpm sensors in front cover, no start … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2000 Sterling with a 3126 cat/ ser. No.- 8YL07930,
I have a 2000 Sterling with a 3126 cat/ ser. No.- 8YL07930 , sitting inside non heated building for 3 years, have no voltage to IPR valve when cranking over, ? Where does the power signal come from? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
99 3126 cat no start. 99 Harney RV 3126 Cat. I am fixing
I am fixing myself. Ran fine month ago, no start changed fuel filters, no start. Got flash codes 15 and 17 changed out iprv now will hit but not start. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1998 Gmc 6500 with a 3126 cat cranks over fine but
I have a 1998 Gmc 6500 with a 3126 cat cranks over fine but will not run without a helper shot of ether. Once it starts it runs fine no codes once you shut it off it will start back up but only immedi… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Got a 2001 gmc topkick with 3126 in it. Was running fine.
Got a 2001 gmc topkick with 3126 in it. Was running fine. Went to start long cranking. Had already run into bad inj actuation sensor couple weeks back. Fixed that. I unplugged the sensor again to test… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
1998 GMC C 7500, altec ap45, ALLison push button, CAT 3126
1998 GMC C 7500, altec ap45, ALLison push button, CAT 3126 (7as 12451). No start. Will not crank from Key. I can only get it to crank via push button that i Installed. Already changed Starter, timing … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
We have a 3126 sn CKM34634 it came into the shop running but
we have a 3126 sn CKM34634 it came into the shop running but smoking bad. We found coolant temp sensor was bad , that took some of the smoke away, we thought possible injector seals. We removed the in… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
My cat 3126 won't start. It's a 2001 gmc t series truck with
It's a 2001 gmc t series truck with a cat 3126 engine … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Cat 3126 sluggish when cold running fine as soon as t
cat 3126 sluggish when cold running fine as soon as t reaches 150 temp it wakes up any clues no codes… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
How is your service priced? Cat 3126 in '99, Trying to! New
Trying to! New speed/timing sensor, new fuel transfer pump, checked power to ecm (from harness side), pin 70 has 9.8 to 10 volts when cranking, Fuel restrictor at back of head works, with no sign of metal fragments. Also, sprayed contact cleaner on both ECM pins and sockets. This cat 3126 is in '99 GMC. Engine serial #7AS79444. Oh, cannot check flash codes as vehicle does not have cruise control. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2008 Kenworth T680 with C15 engine with dpf
Hello I have a 2008 Kenworth T680 with C15 engine with dpf truck was sitting for a while battery's aren't great so I turned it on about 5 times and let it idle to charge battery's but it seem like the… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
Have a 2005 freightliner with a 3126 cat motor, cranks but
Have a 2005 freightliner with a 3126 cat motor, cranks but wo't start ihave 2 active codes pid 164 fmi3 injection actuater pressure and pid110 fmi 3 coolant temp voltage high. I am not even showing th… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1996 Safari Sahara Motor Home with a 3126 Cat. The
I have a 1996 Safari Sahara Motor Home with a 3126 Cat. The engine would not turn enough RPM to shift out of 4th gear. Fuel filter and water separator filter change . Small amount of black slime found… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 1996 Safari Sahara Motor Home with a 3126 Cat. The
I have a 1996 Safari Sahara Motor Home with a 3126 Cat. The engine would not turn enough RPM to shift out of 4th gear. Fuel filter and water separator filter change . Small amount of black slime found… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a f 750 with a cat 3126 motor. I replaced the
I have a f 750 with a cat 3126 motor. I replaced the heuipump and the sensor. Still can't get it to crank.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a Cat C7 in which the Turbo bearings just blew into
I have a Cat C7 in which the Turbo bearings just blew into the intercooler. Replaced the turbo cleaned out everything as best as we could. Kept getting code with error from Barametric Pressure Sensor.… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Hi im daniel i have a freight liner with a 2002 3126 cat engine
Hi im daniel i have a freight liner with a 2002 3126 cat engine vin of Ckm64456 My problem is it will crank over but not start if you push it with a fork lift she fires right up and will continue star… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
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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

Journeyman

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

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

Mechanic

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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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