Poor Idle
Varying engine speed with no change in throttle position
Overheating
Increased Oxides of Nitrogen NOx emissions
Failed vehicle emission test
Check all vacuum lines to make sure there are no leaks.
When the vehicle is idling, squeeze up on the bottom of the EGR valve diaphragm.
If your vehicle's engine idle speed slows, or the engine stalls, your EGR valve is OK.
If the engine speed does not change, or you can feel hitches in the movement of the valve, replace the valve.
Meters exhaust gas into the intake manifold. This exhaust gas reduces (EGR) combustion chamber temperature and as a result reduces N0X emissions.
This is a emission parts.Ensuring the utmost attention to detail every part number is inspected and cross-checked for quality control purposes throughout the entire manufacturing process. Standard is a leading independent manufacturer and distributor of replacement parts for motor vehicles in the automotive aftermarket industry.

This exhaust gas reduces combustion chamber temperatures and as a result reduces N0X emissions.
Ensuring the utmost attention to detail every part number is inspected and cross-checked for quality control purposes throughout the entire manufacturing process.
Standard is a leading independent manufacturer and distributor of replacement parts for motor vehicles in the automotive aftermarket industry. If your vehicle is running rough or has failed emissions due to a bad EGR valve then this is the part for you. The EGR valve in your vehicle is a critical part of the emission reduction system on your vehicle. At certain throttle levels the valve allows exhaust gasses to recirculate through the engine combustion process. This process is key in reducing Nitrogen Oxide emissions.
This Exhaust Gas Recirculation Valve, is an aftermarket replacement part that has the following specifications:
Direct Fit
Built to strict quality control standards
Includes EGR gasket
Replaces GM Part Number: 12578043
Fits Vin "W" engines - CPI (Central Port Injection)

The EGR valve or Exhaust Gas Recirculation Valve in your vehicle is a critical part of the emission reduction system. The EGR valve uses vacuum from the induction system or a signal from the computer to open a passage and allow exhaust to re-enter the incoming air-fuel mixture. The EGR valve is usually open when your engine is warm and maintaining a constant speed. The exhaust gasses re-enter the air-fuel mixture. Most of the fuel is burned out of the exhaust gas. The reintroduced mixture that comes from the EGR valve actually reduces the temperature of the combustion. This process results in both increased gas mileage and reduced Oxides of Nitrogen (NOx) emissions.
Meters exhaust gas into the intake manifold. This exhaust gas reduces (EGR) combustion chamber temperature and as a result reduces N0X emissions.
If your vehicle is running rough or has failed emissions due to a bad EGR valve then this is the part for you.
The EGR valve in your vehicle is a critical part of the emission reduction system on your vehicle. At certain throttle levels the valve allows exhaust gasses to recirculate through the engine combustion process. This process is key in reducing Nitrogen Oxide emissions.
If you need to match the 8th digit of your VIN (Vehicle Identification Number) to the 8th digit we may have listed in our short description, you can either find your VIN number in the lower driver side corner of the windshield or on your vehicle registration.