For the EGR you just un plug the blue plug from the solenoid, it's usually the solenoid which goes wrong.
On a 306 the values when the air flow meter is faulty (or disconnected) are lower than what you need for full power, hence if you pull it out and it gets slower, it's working, if you pull it out and there's no difference it's probably broken and running off of default values.
Can you read air flow under full load using your snap on kit?
On a 306 the values when the air flow meter is faulty (or disconnected) are lower than what you need for full power, hence if you pull it out and it gets slower, it's working, if you pull it out and there's no difference it's probably broken and running off of default values.
Can you read air flow under full load using your snap on kit?