Trailblazer Pinging
#1
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I Have A 99 TB And The Only Mods I Have Done To It Are A K&N Filter And Clutch Kit. My Question Is That When I Go Ridding Around Slow For About And Hour Quater To Half Throttle It Starts To Make A Pinging Noise In The Engine What Would Be Causing This Or Is It Normal. It Dosent Do It If I Go Ridding Real Hard.
#2
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Pinging usually comes from a lean mixture. Since it's at 1/4 to half throttle you could try raising the needle a step (lower clip) and maybe richen the air mixture.
Check you plug, if it's on the light side this is probably it. Put a new plug in, run up to half throttle and kill the engine and coast to a stop before you check.
Check you plug, if it's on the light side this is probably it. Put a new plug in, run up to half throttle and kill the engine and coast to a stop before you check.
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