Medium and Heavy Trucks
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Thanks for asking your question. I can help you with this.
Was it does not this before replacing the injectors?
Thanks for the information.
There are two things I have seen cause this.
The first is the flyweights in the timing advance are hanging.
Second is the flyweights in the fuel system governor are hanging.
When this happens, the engine will run like this. To confirm the timing advance and the governor would need to be removed and inspected. If they are worn, it will be easy to see.
Please reply back if you need more help or have more questions. I am happy to assist.
No the pump does not have to come off. Both the timing advance on the front can come off as well as the rear governor assembly. If on is worn, both most likely need rebuilt.
Yes you can take the timing advance cover off. If you have a C pointed advance you can see flyweights. If you have a true B the advance will need to be disassembled.
If the flyweights are worn. The contacts points of the flyweight will have worn a groove or hole in the race it rides on. If there is a groove or race, it will hang
No it will not move freely. You may need to remove and disassemble to see the wear.
Normally between 1000 and 1600.
Thanks for the information. That sounds like the advance is slipping. When this happens, the carrier assembly in the advance needs to be replaced. When they go bad. They slip.
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.