EGR question

[BoxMan]

Ok I got an '89 s13 single slammer...
So yeah, just came back from a failed smog inspection. I'm running high on nox:
15 mph: 776 (max: 559)
25 mph: 656 (max: 516)

I've searched the thread and saw that people's HC run into the 1000s but after cleaning the egr valve, they got it below tolerance levels.

Then the inspector tells me he can have the valve cleaned out for 130 bucks..... fk that, people are doing this in their garage in minutes. Well I'd like to know where the hell this egr valve is and how would I go about cleaning it?

[stinky_180]

The EGR valve is easy to spot. On the back side of the motor (closest to firewall) there is a pipe that connects to the exhaust manifold and runs to the otherside of the motor (intake manifold). The other end of the pipe is the EGR valve.

Or simply, get a factory service manual. There was also a trick by pulling one of the vacuum hoses but I never used it, my car passes smog perfectly. Good luck