What would cause a naturally asperated 3208 cat to start over fueling? Oh my, it's in a ford L8000. Need more I'll have

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Customer: What would cause a naturally asperated 3208 cat to start over fueling?
JA: What is the complete model and serial number of your machine?
Customer: Oh my, it's in a ford L8000. Need more I'll have to look tomorrow.
JA: Are you fixing this yourself? What have you tried so far?
Customer: Nothing yet, I've been told it injectors or injector pump. Trying to do the right thing, and I don't want to get one and it turns out to be the other. Yes, I'm the one that's going to be doing the work myself.
JA: Anything else you want the equipment mechanic to know before I connect you?
Customer: Just if this is enough info.
Answered by yellowman99 in 2 mins 4 years ago
Auto Mechanic

16,260 satisfied customers

Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs

Thanks for asking you question. I will try and help you out.
Can you elaborate on your question please? By over fueling, do you mean it’s smoking out the exhaust?
If there is over fueling by an injector. There will be black smoke and normally an engine knock. To find the injector that’s causing this. Just break the lines loose one at a time. When the knock or smoke go away. That’s the bad one.
If there is no knock and the engine runs smooth. The fuel system is the cause.
Please reply back if you need more help. I am happy to assist.
smoking out of the exhuast, one day worked fine. Started the black smoke the next. Still starts just fine.
Tomorrow, I'm watching Texas game, that fine?
Thanks for the information.
Black smoke can also be caused by a plugged air filter. I would check it first.
If it’s ok. I would have the injectors removed and pop tested. If they are ok. I would suspect the fuel system.
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