Diyvehiclerepair
Possible Causes Defective one-way check valve. Defective pressure sensor. Broken, frayed or shorted pressure sensor wiring. Broken, frayed or shorted vacuum switching valve wiring.
- What happens when air injection fails?
- What causes a secondary air injection system malfunction?
- What would be the concern if the SAI one-way check valve was stuck open?
- What is a secondary air injection check valve?
- Can you drive a car with a bad air injection pump?
- How much does it cost to fix a secondary air injection?
- Can a bad secondary air pump cause a misfire?
- Can you drive without secondary air pump?
- Where is the secondary air pump relay located?
- Where is the secondary air injection pump located?
- What does a bad air pump sound like?
What happens when air injection fails?
A faulty secondary air injection pump will cause problems for the air-to-fuel ratio in your internal combustion engine. If this ratio is too lean (not enough fuel), then your engine will have trouble generating speed whenever you step on the gas pedal.
What causes a secondary air injection system malfunction?
CAUSES OF A FAILURE: CAUSE OF FAILURE
Faulty ground and voltage supply can also cause the pump to fail. Blocked or leaking lines can also cause the failure or malfunction of the control or combination valve, resulting in the failure of the secondary air system.
What would be the concern if the SAI one-way check valve was stuck open?
If a P2442 code comes up, a one-way check valve is stuck open in the secondary air injection system, causing too much airflow into the exhaust and allowing hot exhaust gas to travel back into the pump. If the PCM receives a voltage reading of more than 10% of the allowed amount the P2442 code will be stored.
What is a secondary air injection check valve?
Secondary air valves are an integral part of the secondary air system. They are fitted between the secondary air pump (1) and exhaust manifold. They prevent pressure peaks in the exhaust flow from damaging the secondary air system and exhaust gas or condensate from entering the secondary air pump.
Can you drive a car with a bad air injection pump?
While failing a smog test is a serious enough problem, the real danger from a bad air pump is the possibility that reduced engine performance and driveability could cause be hazardous to your driving safety.
How much does it cost to fix a secondary air injection?
All cars are required to have secondary air injection systems, which make exhaust emissions cleaner and help to combust more harmful gases. If your secondary air system fails, then replacing it will cost you between $270-$390. The labor should run you about $90, while parts cost, on average, about $250.
Can a bad secondary air pump cause a misfire?
A faulty MAF sensor will cause your secondary air pump not to switch on. this can cause a rich condition, which can cause misfires, etc...
Can you drive without secondary air pump?
The system is critical to help cars achieve government emissions standards. So, the law says you need a secondary air injection system. Which begs the question: Does a car need a secondary air injection system to run? Strictly speaking, no, it doesn't.
Where is the secondary air pump relay located?
Both are located in the engine compartment fuse box under driver side fender next to the battery. Both relays are 50 amp, bank one is located in slot 45 and bank 2 is located in slot 46. If the relay is bad, replace it with the same amperage rating relay as the original.
Where is the secondary air injection pump located?
The secondary air injection pump is usually located on the engine or at least in the engine bay. It can sometimes be hidden deep into the engine bay, but mostly you will find it installed pretty visible on the engine.
What does a bad air pump sound like?
A bad air pump can make a howling noise. ... You should hear a faint vacuum-cleaner sound for about 30 seconds as your air pump operates. The lack of this noise can indicate that the pump is not working.
