Medium and Heavy Trucks
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Thanks for asking your question and requesting me. I will try and help you out.
It's acceptable to have 4.5 to 5.6 supply voltage to the A wire on the IAP sensor.
Are you reading the 5000 psi on a manual gauge? Or on ET status screen?
Does the engine not start? Are there any codes?
Thanks for the information.
If the pump pressure is at 5000 psi at all times. The heui pump is bad and stuck high. I've seen this many times.
Many times when the heui pump fails it make low or no pressure. But sometimes it gets stuck at max pressure. There is nothing else that can cause the pressure to go to 5000 other than a bad heui pump.
Please reply back if you need more help or have more questions. I am happy to assist.
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.