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2009 Chevrolet Silverado 1500 LS, Engine/Propulsion Waveform
Posted to the Waveform Library on 11/3/2015

this truck has 34K on the odometer, Truck came in with misfire code cylinder #2 only, misfire counts high but not much felt while idle or driving, misfire count subsided at 1000 rpm or higher, swapped coil, plug, wire, and injector no change performed cranking compression test using Pico Scope, as you can see a small dip in cylinder 2 marked by the spark line, in the other picture this is the lifter roller bearing from that cylinder, I also used a stethoscope on the 4 bolts holding down the passenger side valve cover, 4-6 and 8 sounder exactly the same but cylinder 2 had a definite sound change. hope this helps if you run into a similar situation

Greg from Delaware


car Vehicle Data

2009 Chevrolet Silverado 1500 LS 4.8L

Engine4.8 L / 8 cyl / GAS
Trans4-speed AutomaticTransmission (Electronic)
DeliveryFuel Injection
ConditionKnown Bad