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Cat Man
Cat Man, Cat Engine Expert
Category: Medium and Heavy Trucks
Satisfied Customers: 8411
Experience:  I am ASE Master Truck Certified.
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Replaced Huey pump and truck smokes excessively, 3126 cat,

Customer Question

Replaced Huey pump and truck white smokes excessively
JA: What is the complete model and serial number of your machine?
Customer: 3126 cat
JA: Are you fixing this yourself? What have you tried so far?
Customer: Yes I replaced the huei pump and truck rough idles and white smokes excessively
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: No
Submitted: 1 month ago.
Category: Medium and Heavy Trucks
Expert:  Cat Man replied 1 month ago.
Thanks for asking your question. I will try and help you out.
Was the truck doing this before replacing the heui?
Can you tell me if there are any codes?
Customer: replied 1 month ago.
No truck wasn't doing this before and I don't know if it has a xode
Expert:  Cat Man replied 1 month ago.
Thanks for the information.
May I ask why the heui was replaced?
Customer: replied 1 month ago.
Engine light is on but don't know about code
Customer: replied 1 month ago.
It had a bad oil leak
Expert:  Cat Man replied 1 month ago.
Thanks for the information.
If it's smoking white and was not before. You may have gotten a bad heui pump.
Is the yellow engine light on now?
Customer: replied 1 month ago.
engine light is on now
Expert:  Cat Man replied 1 month ago.
Since the light is on. I would like to try and pull codes by using the cruise control switches. If you have never done this. Here is how.Use the following procedure to retrieve the flash codes from the check engine light:
Turn the ignition key switch to the On position/ Engine OFF.
Turn the cruise control ON/OFF switch to the OFF position.
Move the SET/RESUME switch to either position. Hold that position until the yellow lamp begins to flash.
The yellow lamp will flash in order to indicate a two digit flash code and the SET/RESUME switch may be released. The sequence of flashes represents the system diagnostic message. Count the first sequence of flashes in order to determine the first digit of the flash code. After a two second pause, the second sequence of flashes will identify the second digit of the flash code.
Any additional flash codes will follow after a pause. These codes will be displayed in the same manner. Flash Code 55 indicates that No Detected Faults have occurred since the ignition key switch has been turned to the ON position.Let me know what two digit code you get and I can tell you what the problem is.
Customer: replied 1 month ago.
It looks like the code is 11
Expert:  Cat Man replied 1 month ago.
Thanks for the information.
Sorry. There is no code 11 on the list.
If the engine was running fine before replacing the heui. I would suspect the new heui is faulty.
They are not timed to the engine and they do not need any special priming or anything.
Expert:  Cat Man replied 1 month ago.
What is the engine serial number?
Customer: replied 1 month ago.
100522GHEP28093
Expert:  Cat Man replied 1 month ago.
Thanks for the information.
Did you install the complete heui and fuel transfer pump? Or did you remove the fuel transfer pump from the heui?
Customer: replied 1 month ago.
Replaced complete with transfer pump
Expert:  Cat Man replied 1 month ago.
Thanks for the information.
Sounds like a bad out of the box heui. There is a special procedure to remove and install the fuel pump. But if you did not do That, it must have came bad from parts department. I've had this happen to me many times.
Please reply back if you need more help or have more questions. I am happy to assist.
Expert:  Cat Man replied 1 month ago.
Hey. I just wanted to see how things were going. Please let me know if you need more help. I am happy to assist. If my information was helpful, please leave a good or higher rating so that I receive credit. Thanks.
Customer: replied 1 month ago.
Replaced pump but truck still didn't run right so I took it to a shop.
Expert:  Cat Man replied 1 month ago.
Thanks for the information.
Keep me posted on the outcome. If you need more help. I'll be here to assist.
Customer: replied 1 month ago.
Thank you
Expert:  Cat Man replied 1 month ago.
You are very welcome my friend. I am happy I could help.

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