IronEagle Posted September 27, 2018 Report Posted September 27, 2018 Is there a special sequence to remove/install the intake plenum. I have a 92 Lumina 3.1L V6 with 3 speed auto. Quote
Pontiac6KSTEAWD Posted September 27, 2018 Report Posted September 27, 2018 If you have the smooth top (Gen 1 3.1), the throttle unbolted (2 13mm bolts), and the EGR valve unbolted (2 13mm nuts), once you have those off, all that remains in the vacuum port on the rear of the of the plenum. Then you unplug the sensor on the left side of the plenum. Unbolt the 9 (10mm) bolts on top of the plenum. Carefully lifting it up, there is still one more vacuum line under the plenum that cant be reached until the plenum is lifted off. I think thats it, been a couple years since I pulled a plenum off one of these. Quote
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