Operation CHARM: Car repair manuals for everyone.
Home >> Buick >> 1982 >> Skyhawk L4-112 1.8L VIN G 2-bbl >> Repair and Diagnosis >> Powertrain Management >> Emission Control Systems >> Exhaust Gas Recirculation >> EGR Control Solenoid >> Description and Operation
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

EGR Control Solenoid: Description and Operation

Some engines are equipped with an EGR bleed solenoid located in the EGR line.

Engine Cold
The bleed solenoid--energized when the engine is cold--bleeds off system vacuum so the EGR valve will operate at half normal vacuum.

Engine Warm
Solenoid is de-energized allowing full ported vacuum to be applied to the EGR valve.

[1][2]Torque Converter Clutch Engaged
Some bleed solenoids reduce vacuum to the EGR valve when the torque converter clutch is applied.
pro multis · About Operation CHARM