Can a bad oil pressure switch cause the transmission to not shift?
Can a bad oil pressure switch cause the transmission to not shift?
Just like the above situation where the transmission has difficulty shifting due to a faulty oil pressure switch, this same problem can cause the transmission to not shift when it should. In this situation the engine RPM will be much higher than it should when it triggers the transmission to shift into a higher gear.
Can a transmission be set to shift at a certain RPM?
The transmission may be set to shift at a certain RPM/throttle position and will continue to do so even if the engine doesn’t have enough power to be in the normally appropriate gear. I saw a truck with a failing ignition coil pack that had a several stored codes relating to various misfire conditions and a check engine light.
What happens if your fuel pressure is too high?
The regulator may be faulty if the fuel pressure does not increase by about 5-10 psi. Too high of pressure may result in over fueling of the engine. As a result, This can lead to a rough running engine; poor fuel mileage, and black smoke coming from the exhaust. If your regulator is going bad, your car could display several different symptoms.
Why does my car run at 1200 rpm?
Some cars, especially older cars with carburetors are designed to run at 1200 rpm or so until they are warmed up. And in modern cars, if you are running several accessories, such as the air conditioner or heater, the engine’s onboard computer may be telling it to run at a higher RPM to provide the necessary power.
What should the lift pressure be on a Cummins Engine?
These engines should have between 18-30 psi or more of lift pump fuel pressure. If you have fuel at the injector, good fuel supply pressure, and you are fairly certain you have no more air in the system, you may have a weak injector pump or incorrect injector pump timing.
What are the most common problems with a Cummins transmission?
Some of the most common problems with this transmission involve being stuck in a gear, failure of the torque converter to lock, or hard shifts. These problems are known to make successful mods to this transmission nearly impossible. That is largely due to the small size of the transmission’s shafts, clutches,…
What are the problems with a Cummins 5.9 engine?
Despite the reliability of the Cummins 5.9, its fuel system is its Achilles heel. As discussed above, the fuel injectors are responsible for spraying highly pressurized fuel into the engines cylinders. With the 5.9’s fuel pumps flowing north of 25,000psi, the injectors face a significant amount of stress.
Why is the Cummins 47RE transmission so small?
That is largely due to the small size of the transmission’s shafts, clutches, and converter; they’re all considerably smaller than those on the competing GM (Allison) and Ford Super Duty transmissions. The 47RE also uses an older design on its components that existed before the transmission was introduced.
