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Related Medium and Heavy Trucks Questions
Engine knock, no smoke at all. It's in #2 didnt start until
Engine knock, no smoke at all. It's in #2 didnt start until after i changed fuel lines … read more
Bradey V
Bradey V
Certificate
I have a 3406b engine. It misses n has smoke. Warm n cold.
I have a 3406b engine. It misses n has white smoke. Warm n cold. Just had injection pump rebuilt n timed. Still misses. Changed injectors around n still misses in the same hole. Didn't burn excessive … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
I have to remove and place plunger on 3406B CAT fuel pump.
I have to remove and place plunger on 3406B CAT fuel pump. What's the best way to tell if the plunger travel at bottom and keep in timing.… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a 2016 Peterbilt 389 with a 2015 Cummins ISX 550 and
Hello I have a 2016 Peterbilt 389 with a 2015 Cummins ISX 550 and I have 389434 miles do u know if I am in danger of the ceramic fuel pump plungers failing? And do I even have the ceramic fuel plunger… read more
Mike
Mike
Triage Tech/Shop Foreman
Associates
217 satisfied customers
Have 3406b mechanical pump I have fuel to the pump but none
have 3406b mechanical pump I have fuel to the pump but none at injecter lines when cranking ? … read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have 1996 TopKick gmc. Can u tell me where the fuel pump
I have 1996 TopKick gmc. Can u tell me where the fuel pump is located. Looks to be in fuel tank but I not a mechanic … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
I've got a 3126E that I'm having some issues with. No check
I've got a 3126E that I'm having some issues with. No check engine light and no stored codes. The engine will usually start and run smooth for about 15 seconds, start knocking, blow white smoke, and s… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
I put in a set of used injectors and used fuel pump. Now I
I put in a set of used injectors and used fuel pump. Now I get diesel fuel into motor. It is a 3406B CAT. I already checked the fuel line to the injectors. How can I find out how the diesel fuel keep … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
3,693 satisfied customers
3406b 1993 CAT INJECTION PUMP REPLACE, NEW PUMP INSTALL
3406b 1993 CAT INJECTION PUMP REPLACE, NEW PUMP INSTALL SMOKING BLUE AND WHITE ,REPLACED OLD PUMP SMOKING. TRUCK WAS NOT SMOKING UNTIL I CHANGED THE PUMP. I DID CHANGE THE REAR HOUSING UNIT FROM OLD T… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
It won't shut off. 1993 International 4700. I try to turn
I try to turn the key and it stays on. Haven't got any further … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
205 satisfied customers
Have a 89Ford LTL9000 with 3406B motor replaced 6 fuel
Have a 89Ford LTL9000 with 3406B motor replaced 6 fuel injectors but now have a miss. Dont know where to go next? … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
I removed number 6 fuel plunger now when i re-installed
i removed number 6 fuel plunger now when i re-installed engine not running right . HELP! … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
Working on a 3406B CAT today. ESN is 7XC12055. Customer
Working on a 3406B CAT today. ESN is 7XC12055. Customer concern is excessive smoke and missing. With the temp gun found #1 & #2 holes cold. Cracked the fuel lines off of the pump with no change. Pulle… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
I have a 1991 mack truck with a mack pedigree motor beleave
I have a 1991 mack truck with a mack pedigree motor beleave its a 400. part# ***** 3514 and s/n # ***** the vin reads 12mp270c3mmo10947. … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,735 satisfied customers
I have a 1984 peterbilt 379 with a cat 3406b we just replaced
i have a 1984 peterbilt 379 with a cat 3406b we just replaced the engine when we started it ribs it self wide open and wont shut off unless u block the turbo off… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
My names JJ. I have a 3406b that has a knocking noise from
My names JJ. I have a 3406b that has a knocking noise from front or bottom. I got the truck in pieces. Customer had the head removed before I got it. Reassembled with exchange head and had a knocking … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,098 satisfied customers
2003 Freightliner century with egr series 60 Detroit,engine
2003 Freightliner century with egr series 60 Detroit,engine starts right up and misses really bad,NO CHECK ENGINE LIGHT,truck pours out smoke,smoke smells like diesel,exhaust pipe is wet around the to… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
i ihave a 89 peterbilt with a 3406B cat engine overhauled 95k
i ihave a 89 peterbilt with a 3406B cat engine overhauled 95k ago. Before the rebuild the truck had a slight vibration at idle but went away when i would bump the idle up around 900rpm. the truck idle… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

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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

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Curtis B.

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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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