EGR Light on Dash 86 B2000

[rollin17s]

I have a 1986 Mazda B2000, and there is a light on the dash that stays on it says EGR. Wondering if maybe the EGR Valve was bad, or hooked up incorrectly.

[mazdubracing]

chek the vacuum source for the egr valve, if it has vacuum at idle and if it runs rough at idle then its hooked up incorrectly and also it may have some carbon build up holding open the valve, i just disconnected my egr valve and i noticed no differance in the way it runs

[far2sly4u]

Mazda turns on the EGR light at 60,000 miles and again at 80,000 miles as a way to force you into a dealership service shop.

Under the dash on the far left you will find a two wires (one green and one brown) one of them will be plugged into a white plastic wire connector. Unplug it and plug in the other wire. Start your engine, the light will go out. Estimated test time = 30 seconds

If you need to test the EGR:

1. With a cold engine to prevent burning yourself, feel inside the EGR valve and crank the throttle for a quick rev once or twice (you should feel the plunger lift up then drop again).
2. Turn off the engine. If the plunger didn't move try to move it by hand, if it is stuck, remove and clean or replace the EGR valve. If it isn't stuck, pull the vacuum line and push the plunger up. Put your finger over the vacuum tube and release the plunger. You should feel a small vacuum and the plunger should drop when you remove your finger.
3. With the engine at idle, push the plunger up. The engine should run rough or die.
Estimated test time = 1 minute