Question about 1995 Saab 900
v6 2.5 Calibra pinging on part throttle during acceleration. Car is run on 98 octane fuel. Use additional octane boost and it still pings. The vehicle has done 145,000 kmh.
Using that high of octane fuel can cause the problems you might be having. using a higher octane is great but higher octane means higher cylinder pressures which pulls a very high demand on th ignition system, you need the ignition system to overcome aif/fuel and compression/cylinder pressures. try lowering the octane of upgrading your ignition system. the kocking/pinging you are hearing is incomplete combustion sounds. hope this helps
Posted on Aug 14, 2008
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Posted on Jan 02, 2017
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