What does a intake valve actuator do?
The Intake Manifold Actuator is mounted on an Intake Manifold that acts as a passage of air that is sucked into the cylinder of the engine.
How do you fix code 94 on a Caterpillar c15?
Code 94 is IVA # 5 and 6 that is not responding, current is too high or low. Most of the time the plugs going to the solenoids get brittle and loose contact, or could be a broken wire. I would remove the rear valve cover and check the wiring harness or plugs going to the IVA’s.
What does IVA pressure sensor do?
The Intake Valve Actuation system (IVA) uses pressurized engine oil to delay the closing of the intake valves. The system is controlled by the Engine Control Module (ECM).
How does cat IVA work?
The variable valve actuators are used in order to control the closing of the inlet valves. The variable valve actuators do not operate until the engine oil has reached a desired temperature. The oil for the variable valve actuator flows from the oil filter base to an oil rail that is outside of the head.
Where is the oil pressure sensor on a C15 cat?
The oil pressure sensor is on the drivers side, behind the engine mounted fuel filter. There is 2 sensors together, one is marked ATMOS, and the other is OIL.
What is a VVA solenoid?
Abstract: Variable valve actuation (VVA) technologies are used to add flexibility to the engine’s valve train by enabling variable valve event timing, duration and/or lift. The main types of VVA technologies include valve timing control (VTC), variable valve lift (VVL) and camless valve trains.
What should the oil pressure be on a c15 cat?
The oil psi at idle is normal (30psi) and cruise speed is also normal (1250-1300rpm is 60psi).
Where are the actuators located on an intake valve?
Actuator (4) – The actuators are located under the valve covers. Pressurized engine oil flows from the rail to each actuator. The actuators use the pressurized engine oil and electrical commands from the ECM in order to delay the closing of the intake valves.
Where is the check valve on a C18 engine?
Right side view of the rear of a typical C18 engine. Check valve (3) may be located at the top of the oil supply tube or at the bottom of the oil supply tube. Top view of the right rear of a typical C18 engine. Two O-ring seals are installed at location (26) between quill tube (24) and jumper tube (25) .
Why is my intake valve not responding to my ECM?
Damaged O-ring seal or missing O-ring seal. The intake valve actuator is not responding correctly to the commands from the ECM. This can be caused by the following conditions: There is an oil leak in the system. There is a problem with an actuator.
What causes intake valve to be partially open?
This condition can be caused by debris or by abuse. These conditions hinder the movement of the valve’s internal components. If the control valve is partially open, a 283-7 code is usually activated in addition to the 385-1 code. Follow the troubleshooting procedure in order to identify the root cause of the problem.