i have a 2001 peterbilt with an cat MBN bridge engine in it, cat say that this is the engine that come with the truck, how is that possible? from my understanding, they did not make this engine until 2003.
i don't have any pulling power, i have changed the turbo, the boost sensor, tuned it up,
Hi. Thanks for using JA! I will try and help you out.The MBN was first released in 2001. It was installed until December of 2003. Please reply back if you need Moore help. My goal is to give great service so please let me know.
i am having power problems and pulling power. any suggestions on how i can get power
There are several things that can cause low power on these engines.
What all has been checked?
Has it always had low power, or did it just start all of a sudden?
it has alway been like this since i have had the truck,
I see. Thanks for the information.
There are several things that can cause low power. The first two that come to mind is low fuel pressure and low boost caused by a leak in the air to air cooler.
Your engine should maintain a pressure between 75 and 90 psi at all times. If it drops below 75, the engine will have low power. There is a plug on the fuel filter housing you can use to check pressure. If it is low, I would suspect a failed fuel pressure regulator. I see this a lot. The regulator is located underneath the filter housing. IT is about a 1 inch looking plug. If the regulator is OK. I would next suspect a weak transfer pump.
If the fuel pressure is OK. I would next suspect there is a leak in the air cooler of the engine. I see this a lot as well. To verify, you will need to pressure test it. You can cap off one side and put 30 psi on the cooler and then spray with soapy water. If there is a leak, you will see it.
Please reply back if you need more help.
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