Hello, we have this '86 Buick (it's a Park Av-not a Lesabre like it says) that idles around 1800 rpms, and won't idle down. We can comand it to go to base idle no problem, the fuel trim is correct, no vaccuum leaks detected anywere. We tried a new Delco ECM. I...

FIX posted 12/14/2005

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