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*** L76 intake serious casting issues found - intake is JUNK
We were fighting a problem with a hanging idle on a car we just built. No matter how much we changed the tune the idle would still hang @ 2000rpms. We tried EVERYTHING! Well today I decided to cap off EVERY port on the intake and throw it back on hoping that something was leaking. Before I threw it back on I got a hair up my *** to pressurize it and guess what we found.... All of the 3 support structures in the center of the intake manifold were cracked and had 1/4" holes in them. All you guys that purchased off Ebay better check because the chances are pretty high that everyone got GMs trash because they failed a pressure test.
Sorry to hear that . but on the same note thanks I was going to buy one there too. but I guess I will go to the dealer insted now. sorry to hear about the problem and thanks for sharing the info. hope you get passed this bump in the road soon.