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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
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 cat d5n with a 3126 Huey system. Ran fine
I have a cat d5n with a 3126 Huey system. Ran fine yesterday. It will only turn over today. If you spray a little either to it it will crank but not run good… read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,327 satisfied customers
Cat 3126b 450hp 3gs02038 in my boat. Loud knock out of the
Cat 3126b 450hp 3gs02038 in my boat. Loud knock out of the air intake at low rpms. I un-plugged each injector one at a time and it stopped when #6 was in-plugged. I replaced #6 injector and there was … read more
catmastertech
catmastertech
Field service technician
Vocational, Technical or Trade Scho
1,327 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
Have a 3126. Code 24 and 39. Military truck, mtv. 1083A1.
Yes I'm fixing myself Truck died on the road some time back soldier reported … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Here I have a 3126 that developed a small oil leak on high
hello Jeff here I have a 3126 that developed a small oil leak on high pressue line from HEUI pump to head engine was lopping at idle changed line and injection control valve because it was very rusty … 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
I need to talk with the cat man got a c7 with running
I need to talk with the cat man got a c7 with running problems … 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 2000 C6500 with a CAT 3126 engine serial #8YL51753,
I have a 2000 C6500 with a CAT 3126 engine serial #8YL51753, customer called truck died after hot run, went up to check truck will start with either, wont idle, changed fuel filter, same thing added f… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I have a 3126 cat, truck would start and idle fine, but under
I have a 3126 cat, truck would start and idle fine, but under load the cel would come on, I checked the codes and got icp valve sensor I put a new one and now the truck will not start unless I unplug … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Another question Man if I could please. A smaller 2001 3126
Another question for Cat Man if I could please. A smaller 2001 3126 Serial#7AS71738. When the engine is cold it usually starts, sometimes it just cranks and you have to give it a little shot of starti… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Sir we have a 3126 (8YL74450) that a customer decided to
Sir we have a 3126 (8YL74450) that a customer decided to change two injectors in. After doing so the truck will not start. We can communicate with ECM with ET and have done the following, changed oil … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
I am working on a 02 FL60 with a 3126 Cat that will not start..
I am working on a 02 FL60 with a 3126 Cat that will not start.. wil run on starting fluid..any help… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
Working on a Caterpillar 3126 (eng# *****). Getting a code
Working on a Caterpillar 3126 (eng# *****). Getting a code 164-2 (Injection actuation pressure signal erratic). New actuation pressure sensor and new engine harness from ecm to sensors. Can you point … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 satisfied customers
hey Cat Man. In regards XXXXX XXXXX 04 C7. Switched out the HEUI
hey Cat Man. In regards XXXXX XXXXX 04 C7. Switched out the HEUI pump. Better idle but wont go over 5mph or so. Smoking like a freight train. Ran cylinder cutout test. Def has some bad injectors which… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,344 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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