Your turbo very well could be on the way out. It does happen, unfortunately. Sometimes, the initial assessment may make you think it's a turbo issue, but it can actually turn out to be an injector issue, as well. And the Detroits prior to the DD13/15/16 are, unfortunately, the ones least familiar to me, but if it's using a variable geometry turbo or a wastegate system, your issue may lie there, as well. The simple fact is that you really can't be given an accurate diagnosis on this remotely... it has to be hands on. If you don't know how to troubleshoot and repair it, a shop will be your only option. If you're in the Denver area, I can take my ProLink and pull DTCs to see if there's any codes related to it, but I can't tell you for certain what the problem is - especially not knowing what year and what emissions standards that engine was built to - from afar.
On the left side of the engine.
Need to know what engine you have in order to answer this. In 2003, Freightliner had the option of Detroit, Cummins, Caterpillar, and Mercedes-Benz diesel engines.
Need an engine make and model to answer this. You either have a Detroit Diesel, Mercedes Benz, Cummins, or Caterpillar engine.
Intake valve sensors.128 385 03
About 10 1/2 gals. If it's a Detroit engine. I'd start with 10 gals. Catapillar engine about 12 Gals.
RTC or batery backup low ..thank
You left the important piece of information out - the engine make and model. The FLD120 was available with a number of engine options from Detroit Diesel, Caterpillar, and Cummins.
You should get these codes flashed at you when you sit with the motor off, and the key in the 'ACC' position. You hold up the cruise control button until the codes start flashing at you - yellow for minor faults, red for major faults. Call any Freightliner/Sterling/Western Star dealership, or any diesel repair shop certified to work on Detroit Diesel motors, and they can tell you exactly what your fault codes mean.
I believe it wasn't until 2001 or 2002 that the engine fans on the Detroit diesels came on automatically when the temperature rose. You're probably required to flip the engine fan switch on manually.
I'm assuming you mean 12.7 Detroit Diesel 60 Series engine? IIRC, it's 11 gallons.
Adjust the parameters in the engine ECM. This will require the engine ECM software (DDEC for Detroit or Insite for Cummins) and a Diagnostic Link Connector (such as Cummins Inline 6 or NexIQ).
It would help to know which motor you had. Detroit Diesel, Caterpillar, and Cummins motors were all available options during that model year. Which engine options specifically were available depends on exactly what model Freightliner you have. It could be either an 11.1 or 12.7 60 Series Detroit, it could be a 3206, 3306, or 3406E Caterpillar, it could be the L10, M11, or N14 Cummins, etc.