How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Daniel Wilson Your Own Question
Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 5188
Experience:  Owner at DJ Wilson
Type Your Medium and Heavy Trucks Question Here...
Daniel Wilson is online now
A new question is answered every 9 seconds

I have DTC code number 211 EOP, thats is a 2000 Navistar 7.3

Customer Question

I have DTC code number 211 EOP, thats is a 2000 Navistar 7.3 diesel 444 engine. engine only crank with start fluid.
Submitted: 1 year ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 1 year ago.

Hi my name is***** will be glad to try to help.



Engine Oil Pressure Signal out of range LOW

What are you getting for actual ICP pressure? You should see around 550-800 PSI depending on the old or new cranking to start. Disconnet the ICP sensor to see if it will start in default mode. Also a faulty cam/crank sensor can cause a no start/hard start which is common. Watch the tach signal while cranking. Let me know. Another thing to check is the IDM relay for problems and corrosion in the harness

Customer: replied 1 year ago.
What and where is the idm relay
Expert:  Daniel Wilson replied 1 year ago.

On the step vans I am not sure on the top of my head because some are custom built but on the standard trucks they are on the passenger side in the fuse panel. The IDM is the Injector driver module that supplies the voltage for the injectors. Click the two links below.



Customer: replied 1 year ago.
Hello Dan! I m not close the truck right now, butyesterday night will pu scanner again and they still not start, I will spray start fluid for engine start and go normal temperature for check again and before start the code is 211, but after start they go to other diferent code active now is 525 iInjector Circuit falt *M*. after turn off engine and try to start again they show a DTC 335, Injector Control Unable to Buid press. at engine crank. that's the situation at moment. Thanks again! Mauricio
Customer: replied 1 year ago.
coolant 189, engine speed + or - 700 Rpm , engine oil pressur 24", ICP desured 580psi, and injector control pressure 551 psi.
Expert:  Daniel Wilson replied 1 year ago.

525 is Injector Driver Module internal failure requiring replacement. Need to be programmed by the dealer before installation

Code 335 is for ICP unable to build during cranking

Customer: replied 1 year ago.
Code 525, I think is because will spray start fluid like to push engine to start wuthout electronic works. But, what about code 335? the ICP is brand new, high pressure pump too and also IPR. What's wrong that's only crank with start fluid?
Expert:  Daniel Wilson replied 1 year ago.

525 means your injector driver module is bad. It powers your injectors. 335 is low ICP pressure. Pressurize your high pressure rail with shop air and listen for leaks causing a loss of pressure.

Customer: replied 1 year ago.
This truck have a ECU, don't have module for injectors separately. Also will try put other one from other same year truck and issue still.
Expert:  Daniel Wilson replied 1 year ago.

Hi, All 7.3 that I have ever worked on had an IDM. yes some engine models will have the injector drivers internal with the ECM but I have not seen it on this model. Click on this link

Another cause is cam/crank sensor for hard starting but 525 code is for your injector drivers having an internal failure.

Expert:  Daniel Wilson replied 1 year ago.

Hi Mauricio, Did you get this resolved?

Related Medium and Heavy Trucks Questions