ok so i bought a 2000 impala 3800 v6 a couple months ago it is a use police car it seems to be running ok i just have a couple questions. i have a clicking noise by my alternator and it gets louder the more i accelerate is this a major problem? any thing i can do for it? or should do for it? im also wondering if a chip has been installed on it so i can only hit 140 i was told this by a mechanic he said that used cop cars have a chip installed so you can only hit 140 is this true? thanks for your help cheers.:smile::smile::smile:
The clicking noise could be signs of either a pending alternator failure (bearing), or possibly the tensioner. But my money would be on the alternator.
As for a "chip" in the car. Our cars don't take "chips". The Powertrain Control Module (PCM) is the computer that essentially runs the engine within a set of tolerances. One of these is a speed limiter.
While it's possible that your car may still have a "cop car" set PCM, it's more than likely that it was reflashed with a standard LS PCM setup which has a 105-110 IIRC speed limiter.
Really the only way to tell is to run the car at full throttle until it hits a top speed barrier. I however, do not recommend this as it might get the attention of your local, county, and state law enforcement officials and motivate them to take certain actions against you.
thanks for the info man, i dont plane on taking the car out for a joy ride like that haha but it's nice to know. do you suggest geting this clicking noise checked or should i just hold of tell the alternator goes? once again thanks for the info
Your battery will die in pretty short order if the alternator craps out, and the Impala's electronics don't take kindly to getting boosted by another car. I would get it checked out sooner than later (I think you can check alternator output...).
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