Isuzu: egr problems, bg products, vacuum switch

Question
I HAVE A 1995 RODEO, THE PROBLEM I AM HAVING IS THAT EGR IS NOT OPENING.PUT VACCUM ON IT AND IT OPENS.ONE OF THE VACUUM SWITCH VALVES IS NOT WOKING.

Answer
My suggestion would be to clean the EGR first off.

Here is a guide to cleaning the EGR.

1 : Remove the EGR valve there are 2 holes the larger one is the one that supplies exhaust, flow don't worry about it. The other is a vacuum port this is where exhaust gases are directed when the EGR valve opens, carbon deposits stick to the walls of the vacuum port and in time will restrict flow normally about 30,000 miles.

2: Check your local dealer for Intake cleaner ask about BG products all you will need is the intake cleaner (spray can), or head to your local parts place and pick up a can or carb cleaner that is safe for O2 sensors, find something to plug the larger hole make sure it will not vibrate and fall out there will be slight exhaust pressure on it but not much just be sure it is plugged real well because if not you may be surprised by a flame. Once plugged start the vehicle, spray intake cleaner into the vacuum port you may have to raise the idle to do or just open the throttle by hand spray until the can is empty.

If this doesn't work, email me again.

Thanks,
Adam