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If you are talking about the EGR valve, then take a piece of rubber tubing and plug it onto the EGR valve vacuum port and using your mouth pull a suction on the tube. The valve should actuate (pull in) and if you hold it with your tongue by stopping up the end of the tubing, it should also hold it's vacuum. If it loses it's vacuum or doesn't actuate it is bad.
What else can I help you with?
How many miles to the gallon will you lose with a bad EGR?
There is no way to tell exactly how many miles to the gallon will you loose with a bad EGR. It depends on the car.
How do you tell if the egr valve on the 2001 ford escape is bad?
Diagnostics
What does a '32 EGR failure' mean on a 1988 Chevy Corsica?
the egr valve may be bad call a parts store they should be able to tell you
How do you tell if a 1993 chey p.u. egr valve is bad?
Start the engine, and spray a little carb cleaner around and on the EGR valve. If the engine changes sound are idles up are down then the valve is bad.
Can a bad EGR valve cause high hydrocarbons?
Yes, the EGR valve, or port EGR
How do you know if the EGR valve has gone bad?
hopw do I find the egr valve on a vauxhall signum
Egr valve goes bad?
Sometimes
Where is the egr valve on the 91 Pontiac Grand Am?
Would this cause the car not to start If the EGR VALVE is bad
What could be making the egr code come up on a Mitsubishi diamante besides a bad egr?
it could be the egr valve,or the egr solenoid,oregr sensor if equiped,check those items
Can i drive my car with a bad egr valve?
yes
How does a bad EGR pressure sending unit affect your 97 F250 7.3 diesel?
7.3L does not have EGR Valve.
If the diagnostic says the EGR valve is bad but the light still comes on after it is cleaned what do you do next?
Check the EGR solenoid or some sort of EGR sensor. Most cars have these nowadays. could be bad wiring, sensor holder or pick up.
