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1980 Test Procedure and specificatiuons for AFM

Engine

Vehicle Information: Year: 1980; Engine (size, modifications): Stock 4.5 liter; Total Mileage: 132000;

I have performance problems with my 1980 928 (Auto) I have replaced the fuel pump and filter, injectors, air filter, tested the catalytic converter for backpressure (OK). The exhaust from the cat back is a Borla system. I want to test the Air Flow Meter but need a test procedure with specifications for voltages, resistance, etc. The car cranks and idles flawlessly, runs fine at highway speed but is an absolute dog accelerating. The performance is profoundly poorer than what I am used to. Help with suggestions and a test procedure for the AFM would be greatly appreciated. Its so bad my 1985 944 will absolutely smoke it!

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