When i rev my engine in my 04 impala SS, the rpm's suddenly cut out at about 45k rpm's. Not like the engine wants to die out or anything it just seems as if it is limited to a certain rpm upon reving in park. Never seen this kind of activity with any of my cars as i can red line the rpm's if I wanted to but not in my impala. Not sure what can cause this except for something within the emission system. Does not occur while driving. Only in park or in neutral. Any suggestions as to what I should look at to solve this problem?
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That feature is there for engine and transmission protection. Free-spinning (revving with no load) is extremely hard on an engine. My high-school auto-shop teacher would say if you stole his car you can drag race it, but don't rev it at the light.
This feature also prevents you from revving it to 7k RPM and dropping it in drive to protect the transmission.
