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98 Fl80 Freightliner. I replaced a cummins with a 3126 cat
98 Fl80 Freightliner. I replaced a cummins with a 3126 cat engine and harness. Cat engine is from a 2000 fl80. I have no power at pins 52 and 53. These two wires become one in the harness. wire number… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,017 satisfied customers
1998 Freightliner series 60 Detroit multiple fuel related
1998 Freightliner series 60 Detroit multiple fuel related problems after sitting for periods of time when engine is first started sounds like it's running on one cylinder very very rough until it warm… read more
Roy
Roy
shop foreman
Associate Degree
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I'am working on a 1999 CAT 3406E in a freightliner truck,
Hi, I'am working on a 1999 CAT 3406E in a freightliner truck, the truck has been sitting for 4 months and now it will not start. I scanned the engine there are no active fault codes, I'm almost certai… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,017 satisfied customers
3126 with wild fuel pressure readings. Needle on pressure
3126 with wild fuel pressure readings. Needle on pressure gauge fluctuates from 40 to 90?psi so fast its a blur. Can feel return line at tank pulsating can feel line from filter to head pulsating. Cha… read more
Cat Man
Cat Man
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I have a 99 Freightliner FL 80 with a cat 3126. It is acting
Hi, I have a 99 Freightliner FL 80 with a cat 3126. It is acting like it is running out of fuel. I have replaced the filter, and have checked it several times. One time, the filter was only half full.… read more
FIX-IT
FIX-IT
Comercial transport technician
Vocational, Technical or Trade Scho
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After changing two fuel lines my cat 3126 is experiencing
Hello, after changing two fuel lines my cat 3126 is experiencing some issues; such as the low oil light. The low oil comes on when applying the service brake. Also, the temp gauge goes up. We put the … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,017 satisfied customers
Fl 80 freightliner wont idle up with cruise ecm says brake
Fl 80 freightliner wont idle up with cruise ecm says brake switch is on … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
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I have a 2000 Freightliner with a 3126 Cat motor in it. I
I have a 2000 Freightliner with a 3126 Cat motor in it. I think we had a freeze up about a week ago and then started the truck. The heater was not putting out warm air so I know there was a problem. i… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
Cat Man. I corresponded with you last night concerning our
Hi Cat Man. I corresponded with you last night concerning our 2005 Freightliner CAT 350 whose check engine light and stop engine lights were coming on intermittently.We had a mechanic out today and it… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
1998 cat 3126 in a freightliner bucket truck has a missfire
1998 cat 3126 in a freightliner bucket truck has a missfire at idle smooths out with throttle. lacks power has 70 psi fuel pressure at the upper filter housing 1600 psi of oil pressure at the actuatio… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
My cat 3126 engine knocks under heavy load we have checked
My cat 3126 engine knocks under heavy load we have checked it is getting air bubbles in the return fuel line from back of head that can be seen through a glass tube in the line this causes a loss of p… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
I have a 99 Freightliner FL 70 with a 3126 Cat. The engine
I have a 99 Freightliner FL 70 with a 3126 Cat. The engine cooling fan stays on all the time. Took it off and tested the air clutch as borking fine. Any ideas what to look at next? Thanks… read more
Cat Man
Cat Man
Cat Engine Expert
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I have a cat 3126 8yl45592 in a freightliner fl80. Truck was
I have a cat 3126 8yl45592 in a freightliner fl80. Truck was running fine-parked it and two weeks later cranks but no start. Serviced engine oil and fuel filter. Put it on a scan tool and got no ecm c… read more
Cat Man
Cat Man
Cat Engine Expert
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Allison 2000: ,I have a 2007 FL-M2 W/ C7 cat with two
Hello,I have a 2007 FL-M2 W/ C7 cat with two issues. (1).We momentary lose of acceleration, comes back in 5-6 seconds,(2)the range inhibit light & check eng. come on. The shop I use is sorta stumped.A… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,017 satisfied customers
have a 2000 freightliner fl 70 3126 engine loss of power after
have a 2000 freightliner fl 70 3126 engine loss of power after 160 degrees have replaced huei injecters all filters with no success… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
First time starting my truck in the morning it blows clouds
First time starting my truck in the morning it blows clouds of white smoke. After it warms to almost the halfway mark smoke turns to blue. If I turn the truck off and reset the ecu by switching from t… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
We have a 2003 Freightliner FL80 w/ CAT 3126. It has been
We have a 2003 Freightliner FL80 w/ CAT 3126. It has been having an intermittent sputtering or cutting out problem when seeing a load. It doesn't throw any codes for this. Dealer changed fuel pressure… read more
Cat Man
Cat Man
Cat Engine Expert
9,562 satisfied customers
Hi, my name isXXXXX own Freightliner Century 2004 Detroit
Hi, my name isXXXXX own Freightliner Century 2004 Detroit 60 engine last 6 vin M12223. Have a loss of power issue with my truck . And this killing me. When I driving without trailer everything is fine… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
3,017 satisfied customers
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Daniel Wilson

Daniel Wilson

3,017 satisfied customers

Owner at DJ Wilson

Cat Man

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I am ASE Master Truck Certified.

Wayne

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Curtis B.

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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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