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Related Medium and Heavy Trucks Questions
1996 379. Common problem i guess but I have no trailer brake
1996 379. Common problem i guess but I have no trailer brake lights but everything else is working even tractor brake lights. Ive checked the pressure switch. 1 wire going in with keyed power and 2 co… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I did a engine swap on a 1994 Peterbilt 379, original engine
I did a engine swap on a 1994 Peterbilt 379, original engine was a 3406b swapped to a 3406e. I'm trying to find out how to wire the engine brake and cruise control. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a 98 379 that the fan wont kick on after an inframe
I have a 98 379 that the fan wont kick on after an inframe new water pump, thermostats, new sensors. On the computer it says fan is constantly on … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
442 satisfied customers
I'm having electrical issue with my 96 Pete 379. I have
Hello. I'm having electrical issue with my 96 Pete 379. I have power to turn on the engine and run it. But all my gauges needles froze where last time they were running and no power to ac or heater. N… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I converted my c15 mxs to a single turbo. got the program to
I converted my c15 mxs to a single turbo. got the program to delete my IVA's. Everything worked well for months then out of nowhere the engine started to derate me whenever I use my eng brake. If I st… read more
Bradey V
Bradey V
Certificate
Have 3406e with serial number 5ek67120 truck was running
have 3406e with serial number 5ek67120 truck was running excellent and customer installed after market programmer and on intial power up and test drive check engine light came on I pulled codes and go… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Have a 3406e in a peterbilt, derating power, pretty sure its
have a 3406e in a peterbilt, derating power, pretty sure its the tps … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Having trouble with the Jake brake on my 5EK 1996 3406E
Hello. Having trouble with the Jake brake on my 5EK 1996 3406E engine. After it is activated it does not shut off with the accelerator or dash switch -just keeps going even if I accelerate. It finally… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a 3406e cat with about 60,000 on an inframe, new
I have a 3406e cat with about 60,000 on an inframe, new cylinder head, and new turbo. Yesterday it spun a rod and main bearing. So I am looking for a block and crank. I need to know which prefix block… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a 3406E cat serial number 5EK 550 HP I cannot get
I have a 3406E cat serial number 5EK 550 HP I cannot get more than 18 to 20 PSI of turbo boost before this started I would getting 32 PSI it started dropping gradually over a few weeks period I have c… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Working on a 3406e 5ek in 1996 379 pete, eng fan running all
working on a 3406e 5ek in 1996 379 pete, eng fan running all the time, check wiring and fuses and relays all seem to b ok, on the plug that goes on the manual o/r switch in cab all the wires are hot i… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Have a 3406e in my 2000 model 379 and my engine fan comes on
Have a 3406e in my 2000 model 379 and my engine fan comes on and off at highway speed. It's not running hot. I've replaced the fan sensor on fire wall and a/c sensor on side of the radiator. The fan a… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Catman, Have a problem with a 5EK not starting, not getting
Hey Catman,Have a problem with a 5EK not starting, not getting any engine speed, do not have any engine speed codes, just needing some advice Thanks… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
Lol m working on a 1998 peterbilt that the speedometer isn't
lol m working on a 1998 peterbilt that the speedometer isn't working. Replaced sensor already. Cat et is not registering any speed either. Possibly wiring between sensor and ecm?… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a 1999 Pete 379 with 3406e. Wiring for the two
I have a 1999 Pete 379 with 3406e. Wiring for the two coolant temp sensors was rigged by previous owners. Having problems trouble shooting to find which goes to which sensor. (i.e. gauge or ECM). Also… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
Cat man! I have a 1996 peterbilt 379 with a 3406E, serial#
hello cat man! I have a 1996 peterbilt 379 with a 3406E, serial# ***** i'm looking at a 1999 3406E serial# ***** in a Volvo, both are original to the trucks, my question is can the Volvo motor be put … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
10,252 satisfied customers
I have a 97 Pete with 3406e 5ek. The cruse control works
I have a 97 Pete with 3406e 5ek. The cruse control works until I turn on the air conditioner. It will hold for a few seconds and then quit. It will hold a fast idle with a/c on when sitting still. Any… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e
I'm switching a 99 peterbilt from Detroit ddec3 to cat 3406e 40 pin. What do I need for the cab. I have the harness from the ecm to the firewall from a donor truck. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
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Daniel Wilson

Daniel Wilson

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

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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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