backfire then fast idle

scgnx

New Member
Joined
May 25, 2001
Driving home last night my GN had intake backfire during a mild acceleration. When I stopped at the light the idle was 1300 rpms.Prior to this it was like 750 rpm. The car was running absolutely perfect. None of scan numbers seem out of whack except idle. Car will still backfire when building boost. No MAL codes..Bad LT-1 MAFS ??? Any ideas

- Scott
 
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