Medium and Heavy Trucks
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Thanks for asking your question. I will try and help you out.
If you are getting low fuel pressure warnings and you have changed the filters. There are three other things I would suspect is causing your low fuel pressure.
The first is a restricted fuel Inlet line.
Second is a faulty fuel pressure regulator. The regulator is located at the back of the head where the return fuel line connects.
And lastly is a weak fuel supply pump. It's located on the non turbo side of the engine. T bolts to the back of the heui pump.
Please reply back if you need more help or have more questions. I am happy to assist.
I admit it's odd that both gens have low fuel pressure. They should maintain a pressure between 65-85 psi at all times. If the pressure is low. I always find clogged filters, restricted fuel inlet line, faulty regulator, or a weak fuel pump.
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.