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James, Ford Technician
Category: Ford
Satisfied Customers: 3624
Experience:  Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
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My diesel engine rotates, but won't start. No corrosion at

Customer Question

My diesel engine rotates, but won't start.
JA: Have you checked the battery, particularly the terminal connections? Are they corroded?
Customer: No corrosion at all.
JA: What is the model/year of your Ford?
Customer: 2004
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: perhaps we can continue with our 2004 Super Duty Ford E350 Diesel van. We are working on it ourselves. We have replaced a faulty Egr valve and have no issues with the battery nor cables. Now, our van will rotate or crank but will not start.
JA: Anything else you want the mechanic to know before I connect you?
Customer: We have had a diagnostic test run on the van. Negative for any problems.
Submitted: 8 months ago.
Category: Ford
Expert:  James replied 8 months ago.

Hello, do you have a way to watch data with a scan tool?

Customer: replied 8 months ago.
Customer: replied 8 months ago.
Rotates but won't start. Diagnostic tests last week indicated faulty erg valve- we replaced. After that, we were going to go to the store... we attempted to start the van... it will rotate, but will not start.
Customer: replied 8 months ago.
By the way, we had a diagnostic test after replacing the erg valve and it was diagnosed as having no issues.
Expert:  James replied 8 months ago.

That sounds like a high pressure oil concern or possibly a fuel pump concern. A scan tool to monitor live data is the best way to diagnose this. otherwise it is a guessing game. Once the engine cools down see if the vehicle will start.