I have a 03 silverado with a v6 and when i accelerate to around 2500 rmp, the tach starts going crazy and i hear a clicking noise coming from underneath the vehicle. The thing only acts up after the engine warms up, it has no problems when its cold. I have replaced the cam sensor, the plugs and wires, the distributor, dist. cap, dist. rotor. What else could be causing this?
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