I have a ht570. It cranks good in the morning and after it gets warm it’s hard to start. I have teed into the oil line

Hi there . My name is ***** ***** Have you checked the IPR valve connector for damage ? Also , have you pull the ipr valve out and check the screen on the end of it for signs of damage ?

Ok ... thanks for the info . What year and model of truck is this in ?

Ok thanks for the info . Can you tell me which faults are in memory after clearing the faults and duplicating the problem ? Here is the procedure :

https://www.dropbox.com/s/f526i7b69ifw887/How%20to%20check%20codes%20three%20digit.txt?dl=0

These are spn numbers ... I also need the FMI numbers please

164 is for injection control pressure . Without the FMI number , I cannot tell you more .

Thanks for the info . 164-3 and 164-4 are related to the ICP sensor . I recommend replacing the sensor and reseal the high pressure oil rail . If the valve cover pass through harness looks ok , it can be re-used . Also check the connection at the pass through for the icp sensor . It is the three wire connector between the number 5 and 6 injectors . Make sure it is in good condition as well .

Checking on 171-3 now

171-3 is a sensor or circuit fault for the inlet air temperature sensor . This sensor is mounted on the air filter housing . It is a 2 wire sensor . I would check the connection to this sensor . If connection and wiring looks fine , then I would replace sensor .

They are supposed to leak a little at each injector . This is normal as it is bleeding off excess at the injector port .

If they are leaking huge at 2 injectors , then I would remove and inspect the top of the injectors at the ports . Blow them clean and inspect for excessive grooving going on in the port where the seal would sit . If heavily grooved out , you may need to replace those injectors. Compare all ports on all six injectors

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I will be in an out today but will check in from time to time .

Thank you

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