What causes a diesel engine to idle rough?
This is caused by excess lubricating oil within the engine cylinders during combustion. This is a mechanical problem because engine oil should not be getting into places where it can be burned. In this case, the engine will usually experience a rough start-up, with the idle smoothing out after about 30 seconds.
Why is my diesel engine misfiring?
There are actually three categories of misfires: fuel, ignition and engine mechanical. In diesel engines, a misfire is caused when the ignition is bad. Faulty electronics for a fuel system can hamper the flow to the engine, hampering the reactions necessary for combustion. Fouled injectors can lead to poor atomization.
Can a diesel have a misfire?
Engine misfires are a common occurrence with diesel engines but the good news is that they are typically an easy issue to diagnosis.
What kind of diesel does a Kenworth W900 have?
The truck is a 1999 Kenworth W900 that has been repowered with a DDEC III Series 60. Neither the dealer nor the local Detroit Diesel shop could figure this one out, and after plenty of parts (and money) were thrown at this truck, nothing was solved.
Are there any problems with the series 60 Detroit engine?
Coolant Leakage Older Detroit engines are prone to coolant leakage in the EGR (exhaust gas recirculation) system. Though the problem is not necessarily severe, it can lead to white tail pipe smoke, mild overheating and coolant loss over time. The Series 60 was one of the first in the industry to be offered with a drive-by-wire system.
Why is my Series 60 diesel engine not running?
However, it took Detroit about 10 years to realize that the engine’s idle speed was not fast enough to operate the oil pump. As such, many older (pre-1997) engines have had lower engine bearings replaced more than once due to oil starvation. When it comes to power, the Series 60 tends to favor the higher end of the RPM band.
Is there a problem with the Jake engine?
One down, two to go. If the problem was only an intermittent Jake issue, we would be taking a hard look at the sensor and injector harnesses, but as it is directly related to the engine fan, we can eliminate those as potential problem areas at this point.