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2000 Frieghtliner FL80 3126 cat with 8YL prefix. Has a 6
2000 Frieghtliner FL80 3126 cat with 8YL prefix. Has a 6 speed Eaton, single rear axel. Under load in sixth engine misses and sputtered around 1300-1500 rpm. Engine light flashed on then off. Will hap… read more
Justin
Justin
Diesel Technician
Vocational, Technical or Trade School
9 satisfied customers
2002 Freightliner FL70 C7 3126 Cat Motor. First, over a year
2002 Freightliner FL70 C7 3126 Cat Motor . First, over a year ago, all dash lights and instrumentation including speedo just stopped working. Check engine light and fuel gauge do work. This truck has … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
I have a 2000 CAT 3126 that idles @ 70 psi fuel pressure but
I have a 2000 CAT 3126 that idles @ 70 psi fuel pressure but when you come off idle it begins to drop and it will actually go to 0 psi under a load and the engine still runs ok at psi till it eventual… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
No fuel coming out of fuel pump. 2001 c7500 3126 8yl. I ran
yes. i ran a fuel line from huie straight to the pick up tube in tank bypassing all filters. took exit line off of huie and cranked and got no fuel coming out. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Can't locate cam senor 2003 cat 3126. Cat 3126. 2003
Can't locate cam senor 2003 cat 3126 JA: What's the make/model/year of your truck? Engine type? Customer: Cat 3126 JA: Are you fixing your truck yourself? What have you tried so far? Customer: 2003 JA… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Cat 3126 have to crank forever to start, onece running skips
cat 3126 have to crank forever to start, onece running skips for a few minutes then is fine for rest of day. Can shut off and will fire right back up, replaced crank sensors, checked valve at back of … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Please only answer if you are an expert on the cat 3126
Hello Please only answer if you are an expert on the cat 3126 HEUI … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Lost prime in my 3126 and can't get it started. 8yL71363.
i filled the fuel filter, I removed the fuel regulator and bleeder the system with vacuum, I hooked up electric fuel pump and force feed fuel, … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
We have a C7 with intermitted power loss. sometimes we can
We have a C7 with intermitted power loss. sometimes we can shut it down and restart and it is fine again. Sometimes it will run bad for a day the fine the next day. When it losses power the truck runs… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
CAT C7 engine. Would like to get to Cat Man. Having issues
CAT C7 engine. Would like to get to Cat Man. Having issues with this engine. Suspect an intermittant speed sensor issue. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 2001 cat 3126 ser no. 8yl74019 Starts fine runs
I have a 2001 cat 3126 ser no. 8yl74019 Starts fine runs great until up to Temperature,then will stall in will not restart without ether Then when it does start You have to use You have to keep foot o… 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
I have a 1997 cat 3126 and the heui pump is making a high
I have a 1997 cat 3126 and the heui pump is making a high pitched squeal. also when this started I lost throttle control so all it will do now is idle for a short time then die. I replaced the heui pume and the injector pressure regulator but it didn' fix it … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
3126 Cat 1WM13404 # Not getting fuel from transfer pump.
3126 Cat 1WM13404 # Not getting fuel from transfer pump. Replaced transfer pump on back of huie. Still no fuel. Checked lines coming from tank OK. All filters changed. Put a pump on fuel system forcin… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
2006 Pete with CAT C7. Truck has a fresh rebuild less than
2006 Pete with CAT C7. Truck has a fresh rebuild less than 200 hr ago. Truck was driving and had a sudden loss of power and they had trouble getting it up to 15 mph, (OF COURSE THAT IS WHAT MY DRIVER … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I hope you can help me out like you have so many others. I
I hope you can help me out like you have so many others. I have a 2001 ford f-650 with the 3126-B engine. It started to run ratty and missing when I was moving the truck around. I shut it off to check… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Have a 3126 cat ckm that will not start. Replaced heui after
Have a 3126 cat ckm that will not start. Replaced heui after local diesel shop plugged their computer into it. It started and ran for several minutes died and will not start. Have a gauge in oil line … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 3126 cat engine in a 1999 chev dump truck. The engine
I have a 3126 cat engine in a 1999 chev dump truck. The engine starts but shuts down in about a minute, then starts again about three or four times, then shuts down again. After restarting again it ru… 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

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Owner at DJ Wilson

Cat Man

Cat Man

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I am ASE Master Truck Certified.

Wayne

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

Jeremy

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cumminsdr

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Chris (aka-Moose)

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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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