What can go wrong with a Cummins diesel engine?
What Can Go Wrong With Cummins Diesel Engines? 1 1. Engine Not Starting or Hard to Start. In some cases, diesel engines will flat-out refuse to start. When an engine experiences difficulties starting 2 2. Running Rough at a Lower RPM. 3 3. Lack of Power. 4 4. Black Smoke. 5 5. White Smoke.
What do I need to know about my Cummins Engine?
You’ll need to check for: Low fuel pressure: Fuel pressure is a frequently cited catalyst for engine starting and running issues. The best way to rule it out is to check if the fuel tank is sufficiently filled, then make sure the pump is delivering fuel and run diagnostics on the actual pressure.
What does black smoke mean on a Cummins Engine?
Black smoke means you need to check for: Faulty fuel injectors: If your engine has faulty injectors, they can cause a return flow or drop in fuel pressure, which alters the amount of fuel reaching the engine. Faulty injector pump: Pumps affect the fuel pressure and injectors directly, and a faulty pump can do a lot of expensive damage.
What to do if your Cummins ECM fails?
Diesel ECM engineers are skilled and trained to remedy the failure of electronic components with your Cummins ECM. We have a 1-2 day turnaround to get you back on the road quickly and efficiently.
Why does a 3.73 gear burn more fuel?
For example with a 3.41 gear you maybe be at 1800 rpm in 6th gear on the highway at 80 miles per hour but with a 3.73 gear you would be at say 2100 rpm at the same speed 80 miles per hour in 6th gear. So you will be burning more fuel at the same highway speed because you are at a higher rpm.
Why is there white smoke coming from my Cummins Engine?
Water or oil in the fuel: Clean fuel will burn properly, but if there is anything added in, it can prevent the fuel from burning as it should. If water or oil is in the mix, it may be the cause of white smoke coming from the engine. Water can cause major disruption, so it needs to be taken care of promptly.
Why does my Cummins Engine have low cranking speed?
Low cranking speed: The engine needs to turn over quickly for the fuel pump to generate pressure. The fuel pressure is what activates the injection, and without the proper processes, the engine will have hard starting issues. Low cranking speed is more common during colder seasons.
What should I do if my Cummins engine overheats?
None of that would have caused your problem. A simple thermostat may be more likely, or a fan clutch. They wasted your money and time. I would try to find a Cummins repair shop, usually at or near truck stops. They know what to do and have everything there.
What happens when the sensor fails on a Cummins?
When the sensor fails it usually sends no signal to the ECM. However, it can occasionally flash back on and send a signal to the computer which can cause the engine to surge or lunge forwards. Driving with a failed APPS will be nearly impossible and certainly dangerous.