could be bad injectors
Symptoms of weak injectors in a 1997 Ford 7.3 diesel may include rough idling, decreased engine power, poor fuel economy, and increased exhaust smoke, particularly white or black smoke. Additionally, you might experience hard starting or misfires, especially when the engine is cold. If the injectors are significantly faulty, you could also notice a rattling noise from the engine as it struggles to maintain proper fuel delivery.
underneath fuel injectors small with nut and cable going to them
you take it out
32.75 qts.
injectors are a common problem
15 Qts
ask a engineer
To remove diesel injectors on a Ford Transit Connect, first, ensure the engine is cool and disconnect the battery. Then, remove the engine cover and any components obstructing access to the injectors, such as the intake manifold or fuel lines. Carefully detach the electrical connectors and fuel lines from each injector, and use a suitable tool to unbolt and extract the injectors from their seats. Be cautious to avoid damaging the injector seats or surrounding components during the process.
You could try a chemical cleaner available at auto parts
8.8 or 9.75 ?
Do not touch them if you do not even know where they are located.