Medium and Heavy Trucks
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Thanks for asking your question. I will try and help you out.
Has the fuel pressure been checked? Does the yellow or red engine warning light come on when it's running?
Thanks for the information.
I would first want to check the fuel pressure. It should remain between 65-85 psi at all times. If it's low. You have either a faulty fuel pressure regulator on the back of the head. Or a weak fuel pump. I see this a lot.
If the fuel pressure turns out to be OK. I would next want to read the ECM for codes. Since the light does not work, it may have codes in the ECM. I would suspect a high oil pressure problem. I see this a lot on these theses. Or you may have a faulty ECM. When this happens there will be codes for all the injector circuits. This does not indicate bad injectors. It indicates a failed injector driver module in the ECM.
Please reply back if you need more help or have more questions. I am happy to assist.
The pressure can vary depending on load and rpm. Yeah it's tough when it's an ECM issue. The only way to verify is to install a known good ECM. If the engine has good fuel pressure, good actuation pressure. I must suspect the ECM if there are no codes.
In rare situations I have seen plugged mufflers do this because of a failed turbo. It may be worth checking the turbo and muffler.
Yes it will need to be programmed with Cat ET software to match the programming of the original ECM. Should only take an hour for a dealer to program.
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.